K F S E R I E S O W N E R S M A N U A L

Transcription

1 K F S E R I E S O W N E R S M A N U A L KF750 KF755 SB750

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3 KF700 Series Owner s Manual T A B L E O F C O N T E N T S Section 1 Section 2 Section 3 Read This First...ii 1.1 Safety Precautions...ii 1.2 General Precautions...ii 1.3 Important Information for Professional Riggers...ii Unpacking...iii 2.1 Shipping Damage...iii 2.2 Returning Products to EAW...iii Quick Start...iv 3.1 Important Safety and Rigging Information...iv 3.2 Audio Signal Connections...iv Section 4 Description Overview...1 Section 5 Operation KF700 Series Products Input Connections Mechanical Characteristics and Accessories Electrical Characteristics and Accessories Array Design System Truck-Pack...7 Section 6 Maintenance and Service Warranty How to Contact EAW System Maintenance and Repair Tips KF750F KF750P KF750P-WP KF755F KF755P KF755P-WP SB750F SB750P SB750P-WP...24 Section 7 Specifications...25 Congratulations on purchasing the latest sound reinforcement innovation from Eastern Acoustic Works. The KF700 Series is built upon the same fundamental design principles that EAW has upheld since the introduction of the KF850 Series of loudspeakers in the 1980 s. This new product line draws elements from Virtual Array Technology and PhasedPoint Source Technology, combining these with new patented advances in transducer design and system integration. The KF700 Series centers on a design approach that optimizes building arrays in the three dimensions of physical space while also addressing the key acoustical issues that reside in the fourth dimension of time. i

4 Section 1 Read this first The terms Caution, Warning and Danger are used throughout this manual to alert the reader to important safety considerations. If you have any questions about any aspects of these cautions, contact your local dealer, distributor or EAW. CAUTION: describes an operating condition or user action that may expose the equipment or user to potential damage or danger. WARNING: describes an operating condition or user action that will cause damage to the equipment or injure the user. DANGER: describes an operating condition or user action that will immediately damage the equipment or be extremely dangerous or possibly life-threatening to the user. 1.1 Safety Precautions Rigging (flying) must be performed only by a professional rigger. See Section 1.3 for information for professional riggers. 1.2 General Precautions WARNING: Some aspects of rigging and other related fields for which EAW manufactures, sells or distributes equipment are potentially hazardous. Any person using this equipment is personally responsible for his own safety. EAW transactions are made with the assumption that the purchaser is a qualified individual or will have only qualified individuals perform work with the equipment. EAW will not be liable for any damages arising from the use of equipment sold to purchaser. 1.3 Important Information about Rigging Prior to suspending any EAW loudspeaker enclosures overhead, it is essential that the user be familiar with the load ratings, rigging techniques and special safety considerations appropriate to suspending loudspeakers overhead. The user must determine the load requirements, dynamic loading and any other contributing factors affecting the flown loudspeakers. The user must determine the proper safety factor for specific applications and the required load rating of the connection points. EAW strongly recommends that all rigging be done in accordance with and in compliance with all federal, state and local regulations, relative to properly securing suspended loads prior to usage. The user assumes liability for proper design, installation and use of rigging systems. EAW strongly recommends the following rigging system practices: 1. Documentation: Thoroughly document the rigging design with detailed drawings and parts lists. 2. Analysis: Have a licensed structural engineer, registered architect or other qualified professional review and approve the rigging design before its implementation. 3. Installation: Have a qualified professional rigger install and inspect the rigging system. ii

5 DANGER: Loudspeakers should be suspended overhead only by persons with a knowledge of the proper hardware and rigging techniques. When stacking or pole-mounting loudspeakers, be sure they are stabilized and secured from falling over or being accidentally pushed over. Failure to follow these precautions may result in damage to the equipment, personal injury, or death. EAW strongly recommends the following rigging system practices: 1. DOCUMENTATION: Thoroughly document the rigging system design with drawings and detailed parts lists. 2. PROFESSIONAL REVIEW: Have a licensed structural engineer, registered architect or other qualified professional review and officially approve the rigging design before its implementation. 3. PROFESSIONAL INSTALLATION: Have the rigging system installed and inspected by a qualified professional rigger. Section 2 Unpacking 2.1 Shipping Damage You should have already visually inspected the outside of the shipping carton and noted any damage on the shipping bill you signed. After unpacking, if you find concealed damage to the loudspeaker, save the packing materials for the carrier s inspection, notify the carrier immediately and file a shipping damage claim. Although EAW will help in any way possible, it is always the responsibility of the receiving party to file any shipping damage claim. The carrier will help prepare and file this claim. 2.2 Returning Products to EAW If this loudspeaker must be returned to EAW, contact EAW for a Return Authorization. Use the original shipping carton and packing materials. If the shipping carton is damaged, contact EAW for a new carton. EAW will not be responsible for damage caused by inadequate packing. iii

6 Section 3 Quick Start NOTE: This section is intended only for qualified professional installers. 3.1 Important Safety and Rigging Information CAUTION: Read all of Section 1, "Read This First", for important general, safety and rigging precautions. 3.2 Audio Signal Connections The audio signal connections are via Neutrik NL8 connectors or barrier strips. The two NL8s are wired in parallel. KF750F - 2 x NL8 LF1: pins 1 (+/-) LF2: pins 2 (+/-) MF: pins 3 (+/-) HF: pins 4 (+/-) KF750P and KF750P-WP - 2 x 4-terminal Barrier Strips LF1: bottom strip terminals 1 (-) and 2 (+) LF2: bottom strip terminals 3 (-) and 4 (+) MF: top strip terminals 1 (-) and 2 (+) HF: top strip terminals 3 (-) and 4 (+) KF755F - 2 x NL8 Pins 1 (+/-) not used LF: pins 2 (+/-) MF: pins 3 (+/-) HF: pins 4 (+/-) KF755P and KF755P-WP - 1 x 2-terminal + 1 x 4-terminal Barrier Strips: LF: bottom strip terminals 1 (-) and 2 (+) MF: top strip terminals 1 (-) and 2 (+) HF top strip terminals 3 (-) and 4 (+) SB750-2 x NL8 Left driver*: pins 1 (+/1) Right driver*: pins 2 (+/-) Not used: pins 3 (+/-) Not used: pins 4 (+/-) *Note: Driver position is looking from front. iv

7 Section 4 Description 4.1 Overview Professional loudspeaker systems are designed to optimize spectral, spatial, temporal and usability performance attributes. Quite often optimization in one area compromises performance in another. Thus, loudspeaker design is the art of balancing these goals while minimizing compromise. In order to achieve these goals for the KF700 Series, key developments allowed for performance enhancement in each area without compromise in others SPECTRAL The KF700 Series are true three-way designs. The goal was to develop systems with greater low frequency extension and greater overall mid frequency bandwidth. Traditionally these goals required increased physical size. This was not an option. The KF700 Series loudspeakers were designed as uni-axial enclosures in which all the transducers (woofer, mid-range, and high frequency) share a common acoustic axis. This permitted using larger horns for a more consistent coverage pattern over a wider frequency range and provided more available enclosure volume for deeper bass response while actually reducing physical size. A new, patented mid frequency phase plug was also developed that allows for improved upper mid frequency response from a cone transducer through a large format horn SPATIAL The KF700 Series have 35 x 35 coverage patterns. This enhances building arrays and increases overall system output capability. Conventional phase plugs create beam-width narrowing in the upper portion of the mid-range. The patented KF700 Series mid frequency phase plug provides upper mid-range extension without creating this narrowing. The uni-axial approach minimizes the impact of apparent apex error. This occurs when the separation between physically misaligned transducers changes as the listening point changes. The KF750 horn designs draw heavily from the SimplePhase horns used in the KF900 Series in order to achieve more seamless coverage between arrayed enclosures. The low frequency section uses multiple woofers in a dipole configuration to reduce off axis low frequency energy and thus increase directivity. Research showed that the directivity of the low frequency section could be smoothly matched to that of the mid frequency section. This is done by optimizing the ratio between the woofer spacing within the mid frequency horn and the dimensions of the mid frequency horn mouth. This configuration with its dimensional ratio is patented TEMPORAL The temporal focus is once again on the mid-range section. A mid frequency cone transducer tends to provide better tonality and lower distortion than standard compression drivers, but can smear events in the time domain. This was resolved through a redesign of the mid-range transducer geometry. The multi-axis approach and its subsequent impact on apparent apex error also serves to minimize temporal inconsistencies from transducer to transducer within the enclosure USABILITY Usability goals were satisfied by making the enclosures small. The uni-axial approach met all the performance goals while allowing for a reduction in overall package size. For the most consistent coverage pattern through the low to mid frequency crossover region, the optimal spacing of woofers is smaller than the optimal height of the mid frequency horn. This allows the woofers to reside within the mid frequency horn, once again resulting in a small overall package size. In order to provide simple rigging, the standard KF850 flytrack was chosen. The KF750 utilizes these tracks on the front and back of the enclosure, eliminating the need for putting fingers between cabinets during array assembly or disassembly. Finally, some internal parts have been molded of lightweight materials in order to meet the desired enclosure weight of less than 200 pounds. 1

8 4.1.5 VA4 DEFINED The system overview illustrates that the KF700 Series development was driven by enhancing the acoustical performance of the loudspeaker systems as it relates to its arrayability. Each loudspeaker must therefore array effectively both horizontally and vertically. Consistent controlled coverage patterns in three dimensions guarantees predictable array results from venue to venue. The development goals also dictated that the KF700 Series improve upon the time domain behavior, particularly in the vocal region. The ability of a loudspeaker to maintain the temporal integrity of the original input signal is easily as important as the frequency response in determining the quality of the sound reproduction. Therefore, if harmonics lead or lag fundamentals in the reproduction, then the original signal, and perhaps even the intent of the performer, will be distorted. The ability to maintain the input signal s temporal integrity while delivering smooth frequency response to a well-defined coverage area is ultimately the goal of any loudspeaker. Consistently achieving the desired coverage from a loudspeaker array for a given venue is governed by performance in the three dimensions of space. Maintaining temporal coherence is governed by the fourth dimension of time. Meeting all of these criteria truly addresses system performance in four dimensions. This four-dimensional design approach is VA4 technology WEATHER-PROTECTED (WP MODELS) The KF700P-WP and SB750P-WP models are weather-protected for permanent installations. The exterior of the enclosure is laminated with a water-resistant fiberglass coating. A 2-layer grille is used to prevent water from entering the front of the enclosure. The outside layer is powder-coated perforated steel for physical protection. The rear layer is a 1/8 inch thick foam to break up driven water droplets. Behind the grille assembly, a layer of 100 x 100 wires per inch stainless steel mesh is affixed to the enclosure to prevent any water spray from entering the front of the enclosure. The input panel and back doghouse are weather-sealed with rubber strips to prevent water intrusion. Section 5 KF KF700 Series Products KF700 MODELS Model Name KF750F KF750P KF750P-WP KF755F KF755P KF755P-WP SB750F KF755 2 Operation Description Three-way Three-way Three-way Three-way Three-way Three-way Dual 18-in. Primary Application Concert touring Permanent installation Outdoor installation Concert touring downfill Permanent installation downfill Outdoor installation downfill Concert touring subwoofer KF700 SERIES PRODUCT WEIGHTS System KF750F KF750P KF750P-WP KF755F KF755P KF755P-WP SB750F Net (lb / kg) 198 / / / / / / / 87.7 Shipping (lb / kg) 230 / / / / / / / 91.8

9 5.1.3 EQUIPMENT SUPPLIED Each model is shipped individually boxed, two of which fit on one shipping pallet. Concert touring versions include four cable links, which comprise two fly clips and a load-rated cable whose length is optimized for creating flown arrays ARRAYS Flying one row of downfill is recommended when more than one row of KF750 loudspeakers is flown. At least one SB750F subwoofer is recommended for every two KF750s or KF755s. For more information on building arrays, please refer to the KF700 Touring Usage Guide available at ftp://ftp.eaw.com/productguides/kf700touringusageguide.pdf. Most of the basic array building concepts described in the Touring Usage Guide apply equally to permanent installations. 5.2 Input ConnectIons KF750F - 2 x NL8 LF1: pins 1 (+/-) LF2: pins 2 (+/-) MF: pins 3 (+/-) HF: pins 4 (+/-) KF750P and KF750P-WP - 2 x 4-terminal Barrier Strips LF1: bottom strip terminals 1 (-) and 2 (+) LF2: bottom strip terminals 3 (-) and 4 (+) MF: top strip terminals 1 (-) and 2 (+) HF: top strip terminals 3 (-) and 4 (+) KF755F - 2 x NL8 Pins 1 (+/-) not used LF: pins 2 (+/-) MF: pins 3 (+/-) HF: pins 4 (+/-) KF755P and KF755P-WP - 1 x 2-terminal + 1 x 4-terminal Barrier Strips: LF: bottom strip terminals 1 (-) and 2 (+) MF: top strip terminals 1 (-) and 2 (+) HF top strip terminals 3 (-) and 4 (+) SB750-2 x NL8 Left driver*: pins 1 (+/1) Right driver*: pins 2 (+/-) Not used: pins 3 (+/-) Not used: pins 4 (+/-) *Note: Driver position is looking from front. Note: All models can be special ordered with AP or EP 4, 6 and 8-conductor connectors. 5.3 Mechanical Characteristics and Accessories CENTRAL RAISED PLATFORM WITH TWO MAGNETS CASTER PALL E T S The KF700 Series includes an optional rugged caster pallet (EAW P/N ) designed for years of reliable service in concert touring applications. Caster pallets can be ordered separately in quantities suitable to particular truck packing strategies. FOUR WHEEL CASTERS THREE HANDLES 3

10 KF700 Series caster pallets are constructed of 15 mm Baltic birch plywood with four mounted wheel-casters. The caster pallet shares a common footprint with KF700F enclosures. The pallet incorporates a central raised platform that keys into a recess on the bottom of any enclosure. Magnets on the platform register to steel plates in the recess, attaching the pallet to the enclosure. The caster pallet has three handles for easy transport when not connected to a KF700 Series enclosure GROUND STACKING All KF700(F) Series enclosures are equipped with a UHMW (Ultra High Molecular Weight) plastic stacking pad that keys into the recess in the bottom of another enclosure when stacked. This pad provides for a more secure stack. EAW recommends that fly hardware be used to provide additional stability. A crossed configuration of the cable links allows for minimal slack, improving safety and stability. Stacked clusters should also be strapped together to provide even greater stability. In many venues, most notably theaters that do not permit flown arrays, inverted KF755s will be used to provide upfill when stacked. This scenario forces enclosures to touch topto-top and, therefore, pad-to-pad. In order to prevent slippage and provide a more secure stack, EAW has created a stacking plate (EAW P/N )constructed of painted birch plywood. The stacking plate shares the KF700 Series footprint and provides a central cutout that locks into pads on both adjoining enclosures SUSPENSION HARDWARE FOUR EYE BOLTS INSTALLED INTO TOP THREADED HANG POINTS FLY CLIP/CABLE INTERCONNECT ASSEMBLIES ARROWS INDICATE SIDE HANG POINTS REMOVING THE UNDERCUT 3/8-16 HARDWARE WITH A 7/32 ALLEN WRENCH WARNING: See Section 1.3 for information regarding rigging and suspending KF700 Series loudspeakers. KF700(P and P-WP) Series installation versions utilize internal steel angles to provide a total of sixteen (16) 3/8-16 threaded mounting points (four each on the top, bottom and sides). The enclosures ship with undercut 3/8-16 hardware that sits flush with the enclosure walls. Replacement of factory-installed hardware with Grade 8 forged shoulder eyebolts provides appropriate suspension points on an enclosure. The eyebolt manufacturer should be consulted for eyebolt working load limit specifications. CAUTION: All four points on any given side should be utilized when hanging an enclosure. Failure to use all four points can result in damage to the equipment, personal injury, or death. KF700(F) Series touring versions are equipped with two-position industry standard flytracks located in the front and rear corners. The aircraft grade aluminum track is attached to the Baltic birch enclosure via internal angled steel that runs the full height of the enclosure. This construction is such that the enclosure bears no weight when flown. Each KF700(F) Series touring version loudspeaker is shipped with four cable links described above. These can be used for attaching the enclosures to fly bars as well as for attaching vertically adjacent enclosures to each other. Enclosures should be connected using all four available points (two front and two back) as depicted in the illustration. Available fly bar manufacturer information can be obtained by contacting EAW. 4

11 5.4 Electrical Characteristics and Accessories INPUT SIGNALS: SYSTEM PROCESSING While KF700 Series processing can be implemented in most commercially available Digital Signal Processors (DSPs), EAW s MX8600 and MC8750 DSPs are recommended. Processor settings for specific array configurations are available in a variety of formats that can be programmed directly into many DSPs. Formats include text lists of parameters as well as processor-specific presets. These settings can be found on the EAW web site: ftp://ftp.eaw.com/processing/. Additionally EAW offers the KF700 Wizard also available on the EAW web site at ftp://ftp.eaw.com/kf700wizard/. This program requires you to enter critical venue dimensions and your array configuration. It will then provide you with appropriate signal processing parameters for that venue and array configuration. Discrete left / right KF700 arrays that do not incorporate KF755 downfills require four distinct channels of processing per side: one for each passband of the KF750 and an additional processing channel for SB750. Integrating KF755 downfills into left / right arrays requires two additional channels per side with the low frequency drivers utilizing the same processor output as the KF750 low frequency drivers. Integrating KF755 into left / right arrays as upfills calls for two additional processing channels per side for each row of upfill KF755s. They require only mid and high frequency outputs because ample low frequency energy is provided by the KF750s. Each row requires individual delay settings to provide a coherent sum of the loudspeaker outputs in the balcony. Thus two rows of inverted KF755s require four processing outputs per side. A more efficient though slightly more complex approach exists. The same upfill processing (crossovers, equalization, delay) is used for each upfill row. Thus, two processing outputs can be used to tune the mid and high frequency sections of all the upfills. These outputs would feed the bottom row amplifiers directly with appropriate delay set in the processing. The ouptuts would also feed two signal delays to provide slightly more delay for the top row of upfills. The signal delays must be carefully chosen to ensure that their inherent propagation time plus the delay in the processor does not exceed the desired delay for the top row of upfills. A large KF700 Series array comprised of SB750 subwoofers, multiple rows of KF750s, KF755 downfills, and 2 rows of KF755 upfills normally requires 8 to 10 distinct processor outputs POWER AMPLIFIER REQUIREMENTS All drivers (transducers) in the KF700 Series are rated based upon the results of a power handling test procedure that is derived from the AES standard, but with a number of important differences. Stephen Siegel, VP Engineering, outlines the specifics of the EAW power testing procedure in the EAW Engineering Application Note Understanding Loudspeaker Power Handling and Selecting the Proper Power Amplifier. This can be found on the EAW website DRIVER SPECIFICATIONS: Passband Impedance Power Handling Sensitivity SUB (each driver) 8 ohms 1000 W 98 db LF (each driver) 8 ohms 600 W 97 db * MF 8 ohms 400 W 109 db HF 8 ohms 200 W 116 db * Sensitivity for the KF750 LF section with both drivers operating is 100 db. 5

12 The power handling listed for each EAW transducer is a good indicator of the size of the amplifier that will safely drive it to full output under most conditions. Amplifier selection is dependent upon the load presented at the amplifier output. Each doubling of loudspeaker quantity doubles the required amplifier power. In other words, two KF750s LF drivers in parallel require an amplifier channel capable of at least 1200 W into 4 Ohms. 11' 8" Driving four KF750 LF drivers in parallel (2 ohm impedance) can eliminate one amplifier per rack. While many amplifiers are capable of driving 2 ohm impedances, low frequency performance may be compromised. Amplifier manufacturers should be consulted to determine the power available and distortion present when driving low impedance loads. 90" LOUDSPEAKER CABLE The resistance of the loudspeaker cable should be as low as possible to keep cable power losses low and to maintain an acceptable damping factor, particularly for low frequency transducers. The loudspeaker load will significantly affect both of these factors. For a given wire size and length of loudspeaker cable, a greater impedance load will cause a greater power loss and lower damping factor. This fact must be considered when paralleling multiple loudspeakers on an amplifier channel. The following are minimum recommended wire sizes for loudspeaker cabling. (AWG = American Wire Gauge; MWG = Metric Wire Gauge): Length of Cable Nominal Load Cable Wire Gauge 0-50 ft / 0-15 m 8 ohms 14 AWG / 16 MWG ft / m 8 ohms 12 AWG / 20 MWG ft / m 8 ohms 10 AWG / 25 MWG Over 200 ft / 60 m 8 ohms Not recommended 0-50 ft / 0-15 m 4 ohms 12 AWG / 20 MWG ft / m 4 ohms 10 AWG / 25 MWG Over 100 ft / 30 m 4 ohms Not recommended 0-50 ft / 0-15 m 2 ohms 10 AWG / 25 MWG Over 50 ft / 15 m 2 ohms Not recommended 5.5 Array Design 11' 8" APPROPRIATE VERTICAL CONFIGURATION Each KF750 loudspeaker provides well-controlled 35 x 35 coverage. KF755 loudspeakers provide the same coverage, but are vertically asymmetrical. The vertical pattern lies within 0 and -30 with maximum output at EASE data is available for KF700 Series loudspeakers to aid designers in creating an appropriate vertical configuration for a fixed installation. 90" KF700 (F) Series touring versions require evaluating each venue independently to determine the most appropriate configuration for a given performance. The first step in designing an array is designing a column that will vertically address the audience. It is easiest to determine column requirements by examining a cross-section of the venue with appropriate stage location and array trim height. It is easy to see that audience members seated at varying vertical angles are seated in vastly different acoustical environments. These vertical zones require an integrated array column targeted at seamlessly covering the entire venue from a single location. The primary key to delivering uniform response and SPL to the entire venue is appropriate use of different KF700 Series models to address the complex cross-section of most venues. This topic is covered in detail in the KF700 Series Touring Usage Guide. 6

13 5.5.2 APPROPRIATE HORIZONTAL CONFIGURATION The horizontal coverage angle required for a venue can be readily determined through examination of the plan view. Once the required horizontal coverage has been determined, it is easy to calculate the number of columns required to thoroughly address the entire venue. All KF700 Series loudspeakers provide 35 of horizontal coverage. Since the side angles of KF700 enclosures are constructed at 15 angles, horizontal coverage can be achieved by simply tight packing as many loudspeakers or columns of loudspeakers as are needed.the resulting 5 overlap in coverage between enclosures is intentional by design to provide the smoothest SPL transition between enclosures. 11' 8" 5.6 System Truck-Pack DIMENSIONAL INFORMATION KF700 (F) Series touring versions ride on four-wheeled caster pallets with the wider set of wheels set 23 inches apart so that ramps 30-in wide or wider are easy to negotiate. Two individuals can quickly and easily load or unload enough loudspeakers to create even the largest touring arrays. Two offset handles per side provide an inherent tilt when lifting to facilitate stacking. 96" KF700F full-range loudspeakers are 31 inches in height. The SB750F subwoofer is 47 inches in height. KF700 Series caster pallets add 4 inches in overall height to any stacked column. As a result, 3 high columns of KF700 enclosures or 2 high columns of SB750 enclosures can be stacked in most trucks. CAUTION: Ensure that you do not exceed the load weighting for the vehicle you are using. This is especially important to consider when stacking enclosures two or more high. DANGER: To avoid injury or death to personnel or damage to equipment, only two-high stacks of enclosures should be rolled up or down ramps with up to a 10 slope. Do not stack enclosures if the slope of the ramp is greater than TRUCK PACKING Smaller straight trucks typically have 90 to 95 inches of available internal width. KF700 Series enclosures can be packed into a 90-inch truck body in tightly packed rows of four. Enclosures will stack three high on a single caster pallet. SB750 subwoofers will stack two high in the same footprint. This configuration provides for a maximum of 48 full-range loudspeakers within only 12 feet of truck space. 11' 8" Forty-five inch road cases and decking can be used to create a base upon which two-high stacks of full-range enclosures will fit. European trailers can also support a 90-inch configuration. In the event that 96-inches of internal width is available, an alternate configuration will allow for 54 full-range enclosures in 12 feet of trailer space. This configuration calls for two alternating rows along one wall and a single row at 90 degrees along the other wall. It should be noted that this configuration does not leave much room for protection between rows of enclosures. 100" In 102-inch wide flat-floor semi-trailers with 100 inches of internal width, KF700 Series enclosures pack five wide in alternating rows. This allows for 60 enclosures in just 12 feet of trailer space. This configuration actually occupies inches of actual space, so a small amount of room remains if the trailer width varies slightly. Regardless of trailer configuration, grilles and flytrack should be prevented from contacting one another. Enclosures should be secured so that they do not rub up against each other during transport. Covers or plywood sheets may be used to minimize contact during transport. KF700 enclosures are protected with a durable finish, however, care taken during transport will maintain them in superior condition longer. 7

14 Section 6 Maintenance and Service 6.1 Warranty Eastern Acoustic Works, Inc. (EAW) guarantees its Loudspeaker Systems (excluding active electronics) for a period of six years from date of original purchase against malfunction due to defects in workmanship and materials. WP (weather-protected) product enclosures are warranted for five years. EAW Professional Active Electronics products are guaranteed for a period of three years from the date of original purchase against malfunction due to defects in workmanship and materials. During the warranty period, EAW will remedy all such defects without charge for parts or labor upon the return of the unit together with its original sales receipt or other proof of purchase to EAW or to an Authorized EAW Service Facility. This warranty does not extend to damage resulting from improper installation, misuse, neglect or abuse. Defects in, or damage to, the exterior appearance of EAW products are specifically excluded from this warranty. In no event shall EAW be liable for incidental or consequential damages. Repairs and/or modifications by other than EAW or its Authorized Service Facilities automatically voids this warranty. This warranty gives you specific legal rights and you may also have other rights which vary from state to state. 6.2 How to contact EAW For warranty information, repair service, accessories, technical assistance, printed literature, CD ROM information, additional performance, or other specifications, contact EAW or visit our web site at SERVICE LITERATURE SERVICE LITERATURE Eastern Acoustic Works Eastern Acoustic Works EAW Service Department EAW Literature Department One Main Street One Main Street Whitinsville, MA USA Whitinsville, MA USA Tel (USA only) Tel (USA only) Tel Tel Tel ext 133 or ext 164 Fax Fax service@eaw.com service@eaw.com 8

15 6.3 System Maintenance and Repair Tips OBJECTIVE: This section illustrates the steps to follow when removing the KF700F Series loudspeaker components. To replace the components and reassemble the loudspeaker, reverse these instructions. TABLE OF CONTENTS: Section KF750F...9 Section KF750P...12 Section KF750P-WP...14 Section KF755F...16 Section KF755P...19 Section KF755P-WP...21 Section SB750F...22 Section SB750P...23 Section SB750P-WP...24 CAUTION: Maintenance should only be done by an experienced technician. Improper maintenance may cause serious injury, damage to the loudspeaker and/or void the warranty KF750F LOUDSPEAKER PROCEDURE: Accessing the Woofer Chamber: Remove the grille and grille foam. Remove the 4 screws & washers from the center of the grille with a 5/32 allen wrench. These attach the internal high frequency horn to the grille. Remove the 18 grille mounting screws and washers from the outside edge of the grille with a 5/32 allen wrench. During removal, hold the grille and grille foam in place. This prevents the grille foam from tearing. Do not discard the mounting hardware. GRILLE FOAM GRILLE X HORN & GRILLE SCREWS 1/4-20 X 1 LG BLACK & WASHERS 1/4 NYLON BLACK (ONLY 10 SHOWN) EAW 9

16 Removing the High Frequency Horn Assembly: This assembly is heavy. It is made up of a metal bracket, a horn and a driver with 2 electrical leads. The leads must be disconnected carefully. While supporting the assembly, remove the mounting screws that hold the assembly into the cabinet with a 3/16 allen wrench. These 4 socket head screws, lock washers and flat washers are indicated by the arrows. Do not discard the mounting hardware. Disconnect the red lead + from the red pushbutton terminal and the black lead from the black pushbutton terminal. The terminals are on the back of the driver. Lift the horn assembly away from the cabinet. NOTE: The high frequency diaphragm is not self aligning. Its replacement requires a signal/tone generator for alignment. Please contact our factory for further details. KF750 HORN ASSEMBLY DISCONNECT RED LEAD + FROM RED PUSHBUTTON TERMINAL AND BLACK LEAD FROM BLACK PUSHBUTTON TERMINAL ON REAR OF DRIVER Removing the Two Woofers: The woofer to be removed should rest in the lower half of the cabinet (as shown). Remove the 4 woofer mounting screws with a 3/16 allen head wrench. Do not discard the mounting hardware. Lift the woofer enough to access and disconnect the two electrical leads. The top woofer s red pushbutton terminal has a blue lead+, and its blue pushbutton terminal has a green lead. The bottom woofer s red pushbutton terminal has a blue lead +, and its blue pushbutton terminal has an orange lead. TOP 12" WOOFER DISCONNECT BLUE LEAD + FROM RED PUSHBUTTON TERMINAL AND GREEN LEAD FROM BLUE PUSHBUTTON TERMINAL 4X SCREWS 1/4-20 SOCKET HEAD CAP USE 3/16 ALLEN BOTTOM 12" WOOFER DISCONNECT BLUE LEAD + FROM RED PUSHBUTTON TERMINAL AND ORANGE LEAD FROM BLUE PUSHBUTTON TERMINAL 10

17 Lift the woofer from the cabinet. Flip the cabinet and repeat the above steps for the second woofer Removing the Doghouse: To access the mid frequency driver/phase plug assembly, remove the doghouse. Remove the 10 phillips head screws that attach the doghouse to the loudspeaker cabinet (5 per side, indicated by the arrows). Do not discard hardware. KF750F DOGHOUSE After removing the 10 mounting screws, carefully move the doghouse away from the cabinet. The internal electrical leads that connect the components are short in length and must be handled carefully. Disconnect the two electrical connectors (indicated by the arrows). Remove the yellow lead + from the red pushbutton terminal on the phase plug assembly. Remove the violet lead from the black pushbutton terminal on the phase plug assembly. KF750 PHASE PLUG ASSEMBLY

18 Removing the Phase Plug Assembly: Remove the 4 phillips head screws, lock washers and flat washers. This assembly is heavy and must be supported during removal. Do not discard the mounting hardware. KF750F CABINET WITH DOG HOUSE REMOVED KF750 PHASE PLUG ASSEMBLY X WASHER 1/4 FLAT X WASHER 1/4 LOCK X SCREW 1/4-20 X 3/4 LG PHILIPS PAN HEAD Disassembling the Phase Plug Assembly : Remove the 4 hex head screws, lock washers and flat washers. Do not discard the mounting hardware. Remove the yellow lead + from the red pushbutton terminal on the cone driver. Remove the black lead from the black pushbutton terminal on the cone driver. ASSEMBLY/SFP MID 10" CONE DRIVER THROAT MODE BARRIER X WASHER 1/4 LOCK X WASHER 1/4 FLAT X SCREW HEX HEAD 1/4-20 X 6-3/4 LG NOTE ORIENTATION OF MID COVER AND 10" CONE DRIVER DISCONNECT YELLOW LEAD + FROM RED PUSHBUTTON TERMINAL AND BLACK LEAD FROM BLACK PUSHBUTTON TERMINAL ON CONE DRIVER BRACKET 10" MID PHASE PLUG & HOUSING Reinstallation of KF750F components: To reinstall any of the components listed in this section, reverse the appropriate disassembly procedure KF750P LOUDSPEAKER PROCEDURE: Accessing the Woofer Chamber: Remove the grille and grille foam. 12

19 Remove the 4 screws and washers from the center of the grille with a 5/32 allen wrench. These attach the front of the internal high frequency horn to the grille. Remove the16 grille mounting screws and washers from the outside edge with a phillips head screwdriver. During removal, hold the grille and grille foam in place. This prevents the grille foam from tearing. Do not discard the mounting hardware. GRILLE FOAM GRILLE X HORN MOUNTING GRILLE SCREWS 1/4-20 X 1 LG BLACK USE 5/32 ALLEN HEAD WRENCH (ONLY 2 SHOWN) 4X GRILLE WASHERS 1/4 NYLON BLACK (ONLY 2 SHOWN) EAW 16X GRILLE SCREWS #8 X 5/8"LG PHILLPS HEAD BLACK (ONLY 7 SHOWN) Removing the High Frequency Horn Assembly: Refer to Section Removing the Two Woofers: Refer to Section Disconnecting the Doghouse: To access the mid frequency driver/phase plug assembly, disconnect the doghouse. Remove the 22 phillips head screws that attach the doghouse to the cabinet. The 18 side mounting screws (9 per side, indicated by the arrows) are 5/8 long, and the 4 back mounting screws are 1-1/4 long. Do not discard the mounting hardware. 4X BACK DOGHOUSE MOUNTING SCREWS X 1-1/4 LG PHILLIPS HEAD ARROWS INDICATE THE 9 DOGHOUSE MOUNTING SCREWS PHILLIPS HEAD X 5/8 LG THAT MUST BE REMOVED FROM EACH SIDE OF THE CABINET 13

20 After removing the 22 mounting screws, carefully move the doghouse to access the phase plug assembly. The internal electrical wires that connect the components are short in length and must be handled carefully. Remove the yellow lead + from the red pushbutton terminal on the phase plug assembly. Remove the violet lead from the black pushbutton terminal on the phase plug assembly KF750 PHASE PLUG ASSEMBLY Removing the Phase Plug Assembly: Refer to Section Disassembling the Phase Plug Assembly: Refer to Section Reinstallation of KF750P components: To reinstall any of the components mentioned in this section, reverse the appropriate disassembly instructions KF750P-WP LOUDSPEAKER PROCEDURE: Accessing the Woofer Chamber: Remove the grille, grille foam and wire mesh. Remove the 4 central screws from the grille with a 5/32 allen wrench. These attach the front of the internal high frequency horn to the grille. Remove the16 grille mounting screws and washers from the outside edge with a phillips head screwdriver. During removal, hold the grille, grille foam and wire mesh in place. This prevents the grille foam from tearing. Do not discard the mounting hardware. 14

21 WIRE MESH STAINLESS STEEL GRILLE X HORN MOUNTING GRILLE SCREWS 1/4-20 X 1 LG BLACK (ONLY 2 SHOWN) USE 5/32 ALLEN HEAD WRENCH 4X WASHERS 1/4 NYLON BLACK (ONLY 2 SHOWN) 16X GRILLE SCREWS #8 X 5/8"LG PHILLPS HEAD BLACK (ONLY 7 SHOWN) GRILLE FOAM EAW Care must be taken when handling the wire mesh; it can easily cut into the skin. The wire mesh is held in place by double sided black foam tape. Separate the wire mesh from the cabinet along the bottom seam. Keeping a tight roll, roll the mesh upward to the top of the cabinet. Leave the rolled mesh fastened to the cabinet by the top strip of tape. This will aid re-assembly. ROLLED STAINLESS STEEL WIRE MESH TO REMAIN TAPED ALONG TOP OF CABINET 15

22 Removing the High Frequency Horn Assembly: Refer to Section Removing the Two Woofers: Refer to Section Disconnecting the Doghouse: Refer to Section Removing the Phase Plug Assembly: Refer to Section Disassembling the Phase Plug Assembly: Refer to Section Reinstallation of KF750P-WP Components: To reinstall any of the components mentioned in this section, reverse the appropriate disassembly instruction KF755F LOUDSPEAKER PROCEDURE: Accessing the Woofer Chamber: Remove the grille and grille foam. Remove the 18 grille mounting screws and washers with a 5/32 allen wrench. During removal, hold the grille and grille foam in place. This prevents the grille foam from tearing. Do not discard the mounting hardware. GRILLE FOAM GRILLE X GRILLE SCREWS 1/4-20 X 1 LG 5/32 ALLEN HEAD BLACK (ONLY 8 SHOWN) EAW 18X GRILLE WASHERS 1/4 NYLON BLACK (ONLY 8 SHOWN) 16

23 Removing the High Frequency Horn Assembly: This assembly is heavy, made up of a horn, a metal bracket, 2 metal standoffs, and a driver with two electrical leads. The leads must be disconnected carefully. Remove the phillips head screw and lock washer that attaches the top and bottom supports to the cabinet. While supporting the assembly, remove the bracket mounting screws with a 3/16 allen wrench. These 4 socket head screws, lock washers and flat washers are indicated by the arrows. Do not discard the mounting hardware. Disconnect the red lead + from the driver s red pushbutton connector. Disconnect the black lead from the black pushbutton connector on the back of the driver. Lift the horn assembly away from the cabinet. TOP HORN SUPPORT & X #10 X 3/4 LG PHILLIPS HEAD SCREW & #10 LOCK WASHER HORN ASSEMBLY BOTTOM HORN SUPPORT & Removing the Woofer: The woofer should rest in the lower half of the cabinet (as shown). Remove the 4 woofer mounting screws with a 3/16 allen head wrench. Do not discard the mounting hardware. Lift the woofer enough to remove the blue lead + from the red pushbutton terminal and the orange lead from the blue pushbutton terminal. Lift the woofer from the cabinet. DISCONNECT BLUE LEAD + FROM RED PUSHBUTTON DISCONNECT AND ORANGE LEAD FROM BLUE PUSHBUTTON 4X 1/4-20 SOCKET HEAD CAP SCREW USE 3/16 ALLEN WRENCH 12" WOOFER

24 Removing the Doghouse: To access the mid frequency driver/phase plug assembly, remove the doghouse. Remove the 10 phillips head screws that attach the doghouse to the back of the loudspeaker cabinet (5 per side, indicated by the arrows). KF755F DOGHOUSE After removing the 10 mounting screws, carefully move the doghouse away from the cabinet. The internal electrical leads that connect the components must be handled carefully. Disconnect the two electrical connectors indicated below by the arrows. Remove the 2 leads from the phase plug assembly, the yellow lead + from the red pushbutton terminal, and the violet lead from the black pushbutton terminal. KF750 PHASE PLUG ASSEMBLY Removing the Phase Plug Assembly: Remove the 4 phillips head screws, lock washers and flat washers. The assembly is heavy and must be supported during removal. Do not discard the mounting hardware. 18

25 KF755F CABINET WITH DOG HOUSE REMOVED 4X WASHER 1/4 FLAT KF750 PHASE PLUG ASSEMBLY X WASHER 1/4 LOCK X SCREW 1/4-20 X 3/4 LG PHILIPS PAN HEAD Disassembling the Phase Plug Assembly: Refer to Section Reinstallation of KF750F Components: To reinstall any of the components listed in this section, reverse the appropriate disassembly procedure KF755P LOUDSPEAKER PROCEDURE: Accessing the Woofer Chamber: Remove the grille and grille foam. Remove the 16 phillips head screws that hold the grille and grille foam to the cabinet. During removal, hold the grille and grille foam in place. This prevents the grille foam from tearing. Do not discard the grille screws. GRILLE FOAM GRILLE X GRILLE SCREWS #8 X 1"LG PHILLPS HEAD BLACK (ONLY 7 SHOWN) EAW 19

26 Removing the High Frequency Horn Assembly: Refer to Section Removing the Woofer: Refer to Section Disconnecting the Doghouse: To access the mid frequency driver/phase plug assembly, remove the doghouse. Remove the 22 phillips head screws that attach the doghouse to the loudspeaker cabinet. The 18 side mounting screws (9 per side) are 5/8 long, and the 4 back mounting screws are 1-1/4 long. 4X BACK DOGHOUSE MOUNTING SCREWS X 1-1/4 LG PHILLIPS HEAD ARROWS INDICATE THE 9 DOGHOUSE MOUNTING SCREWS PHILLIPS HEAD X 5/8 LG THAT MUST BE REMOVED FROM EACH SIDE OF THE CABINET After removing the 22 mounting screws, carefully move the doghouse to access the phase plug assembly. The internal electrical leads that connect the components are short in length and must be handled carefully. Remove the red lead + from the phase plug s red pushbutton terminal. Remove the violet lead from the assembly s black pushbutton terminal. KF750 PHASE PLUG ASSEMBLY Removing the Phase Plug Assembly: Refer to Section Disassembling the Phase Plug Assembly: Refer to Section

27 Reinstallation of KF755P Components: To reinstall any components mentioned in this section, reverse the appropriate disassembly instruction KF755P-WP LOUDSPEAKER PROCEDURE: Accessing the Woofer Chamber: Remove the grille, grille foam and wire mesh. Remove the 16 grille mounting screws with a phillips head screwdriver. During removal, hold the grille, grille foam and wire mesh in place. This prevents the grille foam from tearing. Do not discard the grille screws and washers. Rollong up the Wire Mesh: Refer to Section WIRE MESH STAINLESS STEEL GRILLE X GRILLE SCREWS #8 X 5/8"LG PHILLPS HEAD BLACK (ONLY 7 SHOWN) GRILLE FOAM EAW Removing the High Frequency Horn Assembly: Refer to Section Removing the Woofers: Refer to Section Removing the Doghouse: Refer to Section Removing the Phase Plug Assembly: Refer to Section Disassembling the Phase Plug Assembly: Refer to Section Reinstallation of KF755P-WP Components: To reinstall any of the components mentioned in this section, reverse the appropriate disassembly instruction. 21

28 6.3.7 SB750F LOUDSPEAKER PROCEDURE: Accessing the Woofer Chamber: Remove the grille/grille foam assembly. During removal, hold the grille/grille foam assembly in place. This prevents the grille foam from tearing. Remove the 18 grille mounting screws and washers with a 5/32 allen wrench. Do not discard the hardware. GRILLE & GRILLE FOAM GLUED TOGETHER 18X GRILLE SCREWS 1/4-20 X 1 LG BLACK (ONLY 8 SHOWN) USE 5/32 ALLEN HEAD WRENCH EAW 18X GRILLE WASHERS 1/4 NYLON BLACK (ONLY 8 SHOWN) Removing the Two Woofers: Lay the cabinet on its back before removing the woofers. DISCONNECT BLUE LEAD + FROM RED PUSHBUTTON TERMINAL AND BLACK LEAD- FROM BLACK PUSHBUTTON TERMINAL ON WOOFER 2X 18" WOOFER X GASKET X SCREWS PER WOOFER 1/4-20 X 1-1/2 LG SOCKET HEAD CAP X WASHERS PER WOOFER 1/4 LOCK

29 Remove the 8 woofer mounting screws with a 3/16 allen wrench. Do not discard the mounting hardware. Lift the woofer from the cabinet only enough to access and disconnect the blue lead+ from the red pushbutton terminal, and the black lead from the black pushbutton terminal. These terminals are located behind the woofer. Remove the woofer and repeat the above steps for the second woofer Reinstallation of the SB750F Components: To reinstall any of the components mentioned in this section, reverse the appropriate disassembly instruction SB750P LOUDSPEAKER PROCEDURE: Accessing the Woofer Chamber: Remove the grille/grille foam assembly. Be careful handling the wire mesh; it can easily cut into the skin. During removal, hold the grille/grille foam assembly in place. This prevents the grille foam from tearing. Remove the 16 grille mounting screws with a phillips head screwdriver. Do not discard the mounting hardware. 16X GRILLE SCREWS #8 X 5/8"LG PHILLPS HEAD BLACK (ONLY 10 SHOWN) GRILLE & GRILLE FOAM GLUED TOGETHER EAW Removing the Two Woofers: Refer to Section Reinstallation of the SB750P Components: To reinstall any of the components mentioned in this section, reverse the appropriate disassembly instruction. 23

30 6.3.9 SB750P-WP LOUDSPEAKER PROCEDURE: Accessing the Woofer Chamber: Remove the grille, grille foam and wire mesh. Be careful handling the wire mesh; it can easily cut into the skin. During removal, hold the grille, grille foam and wire mesh in place. This prevents the grille foam from tearing. Remove the16 grille mounting screws with a phillips head screwdriver. Do not discard the mounting hardware. Rolling up the Wire Mesh: Refer to Section GRILLE MESH STAINLESS STEEL GRILLE & GRILLE FOAM GLUED TOGETHER 16X GRILLE SCREWS #8 X 5/8"LG PHILLPS HEAD BLACK (ONLY 10 SHOWN) EAW Removing the Two Woofers: Refer to Section Reinstallation of the SB750P-WP Components: To reinstall any of the components mentioned in this section, reverse the appropriate disassembly instruction. 24

31 Section 7 Specifications MODEL KF750 KF755 Configuration 3-way, full range 3-way, full range Powering triamplified (MX8600 processor) triamplified (MX8600 processor) Drivers: LF (2) 12 in cones, dipolar array, vented 12 in cone, vented MF 10 in cone, radial phase plug, horn-loaded 10 in cone, radial phase plug, horn-loaded HF 2 in exit / 100 mm voice coil 2 in exit / 100 mm voice coil compression driver on CD hornq horn compression driver on asymmetrical high Enclosure Shape trapezoidal trapezoidal Enclosure Materials Baltic birch plywood Baltic birch plywood Finish black, catalyzed polyurethane black, catalyzed polyurethane Connectors (2) Neutrik NL8 Speakon (2) Neutrik NL8 Speakon Suspension Hardware (8) 4-position fly tracks (8) 4-position fly tracks (4 each front and rear) (4 each front and rear) Grille powder-coated perforated steel powder-coated perforated steel foam-backed foam-backed Dimensions: Height 31.0 in / 787 mm 31.0 in / 787 mm Width (Front) 27.0 in / 686 mm 27.0 in / 686 mm Width (Rear) 8.8 in / 233 mm 8.8 in / 233 mm Depth 34.0 in / 864 mm 34.0 in / 864 mm Trapezoid Angle 15 degrees per side 15 degrees per side Weight See page 2 Companion Systems: Sub Bass SB750/SB850R / SB1000e / KF940 SB750/SB850 / SB1000e / KF940 Full Range KF755F downfill KF750F full-range Accessories: KF700 Series Caster Pallet P/N P/N Stack Pallet P/N P/N Cable Links P/N P/N Shoulder Eyebolts P/N P/N Frequency Response: ±3 db 48 Hz to 18 khz 48 Hz to 18 khz -10 db 30 Hz 30 Hz Recommended High-Pass Filter (24 db/octave) 35 Hz 35 Hz Axial Sensitivity 1 W/1 m): LF 103 db 99 db MF 109 db 108 db HF 116 db 115 db Impedance: LF (2) 8 Ω 8 Ω MF 8 Ω 8 Ω HF 8 Ω 8 Ω Power Handling: LF 1200 W 600 W MF 400 W 400 W HF 200 W 200 W Calculated Maximum Output 1 m, Peak/Long Term): LF 139 / 133 db 133 / 127 db MF 141 / 135 db 140 / 134 db HF 145 / 139 db 144 / 138 db Beamwidth (-6 db) 35 H x 35 V 35 H x 35 V (0 to -35 ) 25