B&K Components, Ltd.
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.
TABLE OF CONTENTS Table of Contents ............................................................................................................................... iii Safety Precautions .............................................................................................................................. 1 Purpose and Function......................................................................................................................... 2 Features............................................
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.
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.
REAR PANEL VIEW Figure 1 1. AC fuse holder 2. Channel control input/output 3. Dip switches 4. Channel inputs and outputs 5. Channel level control 6. Master control input/output 7. Bus inputs and outputs 8. AC input receptacle 9. Speaker outputs 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.
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.
CHANNEL CONTROL & MUTING Each pair of amplifier channels has its own 1/8” mini control input / output (pass through) 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. A preamplifier’s control output, such as is provided with B&K series preamplifiers, can be utilized to provide a control signal to the AV1260.
INPUT CONNECTIONS Each pair of amplifier channels have their own ‘Local’ input and output RCA connectors. The inputs are designed to accept line level audio from a preamplifiers unbalanced output connectors. Output expansion is accommodated with the supplied output connectors. These outputs are effectively a direct pass through from the inputs. Typical input setup: Figure 3 Figure 3 shows ‘Local’ OUT 1 and 2 connections and how they may be used to connect to another amplifier.
LEVEL CONTROL DEFEAT The following procedures should only be performed by a qualified technician. Each pair of amplifier channels have their own ‘Local’ level control that may be bypassed to allow paralleling output channels. The jumper modules are located inside the unit, on the circuit board, just behind the level controls. Figure 6 shows how jumpers are used to configure the AV1260 amplifier (level controls enabled).
HIGH CURRENT (MONO) USAGE The AV1260 has up to twelve output channels that may be paralleled (mono). This feature allows the amplifier to increase its output power into lower impedance speakers. Set all ‘AMP ON’, ‘L + R’ and ‘BUS’ DIP switches to the ‘ON’ position for the desired channels. Set the ‘SENSE’ DIP switches to the ‘OFF’ position for these channels. Place the volume jumpers for these channels to use the ‘NO VOL’ jumper terminals.
SYSTEM INSTALLATION There will most likely be a number of cables involved in the installation of your home entertainment system. Preplanning is essential in order to maximize system efficiency. We recommend the following as a means of helping you reach that goal. Make a diagram of your proposed system by laying out the relative location of each component in the system. Then lay out the proposed cable runs between them. Number each cable and record its length on the diagram for future use.
TROUBLESHOOTING PROBLEM POSSIBLE CAUSE POSSIBLE SOLUTION No sound (‘on’ LED not illuminated) 1. Power cord not plugged in. 2. Power off at AC source. 3. AC power inlet fuse blown or faulty 1. Reconnect power cord. 2. Check AC switch or fuse 3. Check for shorts or overloading No sound on some or all selected channels (‘on’ LED illuminated) 1. Speaker leads loose or faulty 2. Line stage to amp cables loose or faulty 3. Source to line stage cables loose or faulty 4.
SPECIFICATIONS Power Rating: 8 ohms 4 ohms 60 watts @ 1 kHz 80 watts @ 1 kHz THD (S+N) 0.09 % @ 1 kHz Frequency response 5 Hz – 45 kHz Input sensitivity 0.77 Volts Input impedance 33.2 k ohms Damping factor 80 Current (peak to peak) 16 Amps Slew rate 14 V / sec Dynamic headroom 1.0 dB S/N (A-weighted) 95 dB Voltage gain 28 Line voltage 120/220/240 VAC switchable Dimensions (O.A.) 17”(w) X 14.5”(d) X 5.75”(h) Weight 38 lbs. max. Power consumption 550 watts max 6.
LIMITED WARRANTY B & K Components Ltd., referred to herein as B & K, warrants your B & K equipment against all defects in material and workmanship for a period of five years from the date of purchase. This warranty applies only to the original purchaser and only to equipment in normal residential use and service.
WWW.BKCOMP.COM B&K Components, Ltd.
