SIMPLY BETTER! B&K Components, Ltd. AV1260 Owner's Manual B&K P/N12931 0403 B&K Components, Ltd., 2100 Old Union Road, Buffalo New York 14227-2725 Phone 1-800-543-5252 or (716) 656-0026, Fax (716) 656-1291 E-mail: info@bkcomp.com Web: www.bkcomp.com ii TABLE OF CONTENTS Table of Contents...................................................................................................................................iii Safety Precautions..................................................................................................................................1 Purpose and Function ............................................................................................................................2 Features ...................................................................................................................................................2 Rear Panel View ......................................................................................................................................3 DIP Switch Setting ..................................................................................................................................4 Channel Control & Muting......................................................................................................................5 Master Control & Muting ........................................................................................................................5 Level Control ...........................................................................................................................................5 Input Connections ..................................................................................................................................6 Output Connections ...............................................................................................................................6 Level Control Defeat ...............................................................................................................................7 Jumper Settings......................................................................................................................................7 High Current (Mono) Usage ...................................................................................................................8 System Installation .................................................................................................................................9 Making the Connection ..........................................................................................................................9 Troubleshooting....................................................................................................................................10 Care and Cleaning ................................................................................................................................10 Specifications .......................................................................................................................................11 Limited Warranty ................................................................................................................................................................... 12 Returning Equipment ............................................................................................................................................................. 12 WWW.BKCOMP.COM ...........................................................................................................................13 iii SAFETY PRECAUTIONS PLEASE READ BEFORE INSTALLING WARNING: to prevent fire or shock hazard, do not expose this unit to rain or moisture. Care should be taken to prevent objects or liquid from entering the enclosure. Never handle the power cord with wet hands. · The lightning flash with arrowhead, within an equilateral triangle, is intended to alert the user of the presence of uninsulated "dangerous voltage" within the product's enclosure that may constitute a risk of electric shock to you. The exclamation point within an equilateral triangle is intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the unit. Caution: To prevent the risk of electric shock, do not remove cover. No user-serviceable parts inside. Refer servicing to qualified service personnel. Unplug the amplifier from the AC outlet when plugging in or unplugging cables, when left unused for an extended period of time, moving the amplifier, or when you suspect lightning in your area. Prevent damage to the power cord. Do not bend, pull, place objects on, alter, etc. Replace the power cord if it becomes damaged. Always grasp the plug on the power cord when plugging in or unplugging the amplifier from the AC outlet. Your system may produce sound levels capable of causing permanent hearing loss. Do not operate for extended periods of time at high volume levels. Make sure the amplifier is placed on a level surface. The amplifier is equipped with raised feet to provide ventilation, reduce acoustic feedback, and provide protection against scratching the surface the unit is resting on. We advise against removing or altering feet. Do not stack anything on top of the amplifier (processor, source, etc.) Leave a minimum of 2" clearance from the top of the amplifier to the next shelf (or component) to insure proper ventilation. The amplifier should be located away from other sources that may be sensitive to heat. Do not perform any internal modifications to the amplifier. Always connect the amplifier's power cord to an unswitched AC outlet for normal operation. If young children are present, adult supervision should be provided until the children are capable of following all rules for safe operation. Do not plug the amplifier's power cord into an outlet with an unreasonable number of other devices. Be careful if using extension cords and ensure the total power used by all devices does not exceed the power rating (watts/amperes) of the extension cord. Excessive loads may cause the insulation on the cord to heat and possibly melt. Mistaking CONTROL OUTPUT or CONTROL INPUT connectors for audio/video inputs or outputs may damage your amplifier or other components. Damage can occur to your speakers if the power rating of each individual driver is exceeded by the amplifier. Ensure that all the drivers in your system are capable of handling not only the average power being delivered by the amplifiers, but also the peak power that is likely to be generated during strong passages. If you are unsure of your speaker's power rating, contact the speaker manufacturer or the dealer where you purchased them. The amplifier should be serviced by qualified personnel when: A. The amplifier is not functioning properly. B. Objects have entered the chassis. C. The amplifier was exposed to rain or other type of moisture. D. The amplifier was dropped, or the chassis is damaged. · · · · · · · · · · · · · · · · 1 PURPOSE AND FUNCTION The AV1260 is an integration of a stereo audio distribution BUS with twelve compact and efficient 60 W power amplifiers. Each pair of amplifiers have DIP switches that allow system configuration for use with either mono/stereo and muting control via a Master or Local control input. Additionally, there is support for paralleling multiple speaker output channels to allow greater output current capability. It is clear that the AV1260 is designed to allow flexibility and functionality in the design of Multi Zone power system applications. The term versatile is almost inadequate to describe the multitude of operational modes the AV1260 is capable of providing. Below are just a few of the tasks the AV1260 may be configured to perform: · The most obvious example allows for six stereo audio input pairs to power six pairs of amplified speaker outputs. This is the default factory configuration. · Using the audio distribution BUS, DIP switches allow independent configuration for up to 6 pairs of mono or stereo, with independent automatic audio sense muting per amplifier output pair. · The availability of both Local and BUS audio outputs, allows for a number of units to be cascaded for easy and efficient system expansion. FEATURES Toroidal Transformer - Efficient high current power delivery for improved dynamics. Computer Grade Capacitors - Large capacity computer grade electrolytic capacitors for high transient power delivery and extended low frequency control. Limited Protection - Increased Safe Operating Area and thermal overload allows for continuous duty unattended use. Gold Plated Connectors - Improved connections for better sound and minimized signal loss and degradation. 1% Metal Film Resistors - Low noise precision resistors offer a cleaner more repeatable sound quality. High Current Circuitry - More accurate and three dimensional reproduction of source material with sonic fidelity usually found only in larger power amplifiers. 2 REAR PANEL VIEW 1 S IMPLY B ETTER! SERIAL # CAUTION 2 CTRL 11/12 OUT OUT 11 IN LEVEL 11/12 BUS L+R SENSE AMP ON 3 CTRL 9/10 OUT OUT 4 9 IN LEVEL 9/10 BUS L+R SENSE AMP ON 5 CTRL 7/8 OUT OUT 7 IN LEVEL 7/8 BUS L+R SENSE AMP ON 6 MASTER B CONTROL OUT IN 7 BUS B OUT B&K RISK OF ELECTRIC SHOCK DO NOT OPEN ON ON ON MIN IN CTRL 5/6 OUT OUT OUT 12 5 IN IN MAX 1234 MIN IN OUT OUT 10 3 IN IN CTRL 3/4 OUT MAX 1234 MIN IN OUT OUT 8 1 IN IN CTRL 1/2 OUT MAX 1234 IN LEVEL 1/2 BUS L+R SENSE AMP ON IN BUS A IN OUT OUT FUSE C AU T I O N : F O R C O N T I N U E D PROTECTION AGAINST RISK O F F I R E R E P L A C E O N LY W I T H S A M E T Y P E A N D VA LU E . LEVEL 5/6 BUS L+R SENSE AMP ON LEVEL 3/4 BUS L+R SENSE AMP ON MASTER A CONTROL OUT - AC LINE ON ON ON MIN IN OUT + 6 IN MAX + 1234 MIN IN OUT 4 + IN MAX 1234 MIN IN OUT 2 IN + MAX 1234 IN IN OUT -+ OUT 12 OUT 11 -+ OUT 10 OUT 9 -+ OUT 8 OUT 7 + -+ OUT 6 OUT 5 -+ OUT 4 OUT 3 + -+ OUT 2 OUT 1 8 9 Figure 1 6. Master control input/output 7. Bus inputs and outputs 8. AC input receptacle 9. Speaker outputs 1. AC fuse holder 2. Channel control input/output 3. Dip switches 4. Channel inputs and outputs 5. Channel level control 1. AC fuse holder - The AC Line fuse. The fuse is an 8 Amp / 250 Volt Slow Blow fuse. Replace with same type and value fuse only. 2. Channel control input/output - Each pair of amplifier channels has its own 1/8" mini control input / output (pass through) `Local' control jack to provide remote switching of the amplifier audio mute on/off feature. The control input circuit is designed to work as Tip Pos. (+) and Ring Neg. (-). A minimum of 5VDC @ 1 mA is recommended, and is compatible with up to 24V AC or DC. 3. Dip switches - Each pair of amplifier channels has its own DIP switches that are used to configure the audio signal (`Local' or `BUS', mono or stereo and muting control). 4. Channel inputs and outputs - Each pair of amplifier channels has its own `Local' set of audio input / output (pass through) RCA connections. Typically used for connecting signal patch cables (interconnects) from the preamplifier to the amplifier. 5. Channel level control - Each pair of amplifier channels has its own DUAL input level control. The level of both amplifier channels is set via this control. 3 6. Master control input/output (A or B) - The AV1260 is designed to provide independent control for two groups of amplifier channels, Group A has control over amplifier channels 1-6, while Group B has control over amplifier channels 7-12. Master control A allows for single switching of the amplifier audio mute on/off feature on any pair of amplifier channels (1-2, 3-4 or 5-6) with it's DIP switch setting configured for Amp off and Sense off. Similarly, Master control B allows for single switching of the amplifier audio mute on/off feature on any pair of amplifier channels (7-8, 9-10 or 11-12) with it's DIP switch setting configured for Amp off and Sense off. The Master control output is a pass through of the Master control input. Master control out A could be sent to Master control input B to allow any combination of the 12 amplifier channels muting to be controlled via a single source. The control input circuit is designed to work as Tip Pos. (+) and Ring Neg. (-). A control source capable of sourcing a minimum of 5 VDC @ 1 mA is recommended, and is compatible with up to 24V AC or DC. (The Master control outputs DO NOT source any voltage directly, they only PASS through the input voltage at their receptive inputs). 7. Bus inputs and outputs (A or B) - In a similar fashion to the Master control inputs, the AV1260 has provisions for two independent stereo audio distribution busses, BUS A and BUS B. These are independent stereo audio inputs which allow BUS A (group A) to source audio to amplifier channels (1-2, ...