AV5125 Five Channel Amplifier OWNER’S MANUAL B & K Components Ltd.
B&K Components, Ltd.
Table of contents Safety Precautions page 2 Purpose and function page 3 Design and construction page 3 Features page 3 Rear panel view page 4 Rear panel description page 4 - 6 Level controls page 5 Inputs page 5 - 6 Outputs page 6 Control Muting page 8 - 9 System installation page 7 Making the connection page 7 - 8 Troubleshooting page 10 Care and cleaning page 10 Specifications page 11 Warranty page 12 Accessories included: Manual and Power cord Page 1 13001 rev 0004
SAFETY PRECAUTIONS PLEASE READ BEFORE INSTALLING WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. 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 be sufficient magnitude to constitute a risk of electric shock to you.
The AV5125's purpose and function The AV5125 is a compact, very efficient, five channel power amplifier. It is designed to be used in all types of audio or audio/video systems. Design and construction The AV5125 utilizes high quality electronic circuitry to achieve an environment wherein a detailed, transparent, and highly musical sound can be realized.
Rear Panel View 1. AC fuse holder 2. AC Input receptacle 3. Speaker outputs 4. Amplifier control muting input/output 5. Level controls 6. Inputs Rear panel description 1. AC fuse holder - Holds the AC Line fuse. This fuse is an 12 Amp / 250 Volt Slow Blow fuse. Replace with same type and value fuse only. 2. AC Input receptacle - For attaching the supplied AC power cord to the amplifier. 3. Speaker outputs - For connecting the speakers to the amplifier. Explained further on page 6. 4.
5. Level controls - For adjusting the input level of each channel into the amplifier. There are five level controls on the back of the amplifier. One level control for each channel. Explained further below. 6. Inputs - For connecting signal patch cables (interconnects) from the preamplifier to the amplifier to pass signal. Explained further below. Level controls When using the level controls, first start with them turned all the way up (clockwise).
Here is a typical preamplifier to amplifier setup: Outputs Five way binding posts are provided. One pair for each channel. They are designed to accept a banana-type plug or spade lug connector (shown below) and are color coded for easy identification. The red (+) post should always be connected to the speakers (+) jack. The black (-) post should always be connected to the speakers (-) jack.
System installation There will most likely be a number of cables involved in the installation of your home entertainment system. Pre-planning 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 reference.
Connect the audio cables from your preamplifier’s output to the corresponding input connector on the amplifier. Connect the wires from your speakers to the appropriate outputs on the amplifier. It is absolutely essential that you observe correct polarity in these connections. Example: If you connect your left front output of your preamplifier to channel 4 input on the amplifier, remember to connect your left front speaker wires to channel 4's outputs.
If a source other than a B&K series preamplifier is used to control multiple amplifiers, only the control output voltage from the source is critical. It must be within the range, as indicated on the rear panel, 5-24 volts DC is required. The amplifier will provide each successive amplifier with a control voltage of 12 volts DC for reliable operation. The amplifiers control output may be used as a source of 12 VDC @ 125 mA for other user applications as well. DO NOT POWER MOTORS WITH THIS CIRCUIT.
Troubleshooting PROBLEM No sound (‘on’ LED not illuminated) POSSIBLE CAUSE 1. 2. 3. 4. No sound on some or all selected channels (‘on’ LED illuminated) 1. 2. 3. 4. POSSIBLE SOLUTION Power cord not plugged in. Power off at AC source. AC power inlet fuse blown or faulty. Control switch in the wrong position. 1. 2. 3. Speaker leads loose or faulty. Line stage to amp. cables loose. or faulty. Source to line stage cables loose or faulty. Line stage or source not correctly selected. 1. 4. 2. 3. 4.
AV5125 SPECIFICATIONS Power rating: 8 ohms 4 ohms 125 watts @ 1 kHz 185 watts @ 1 kHz Frequency response 5 Hz - 45 kHz Input sensitivity 1.0 Volts THD (S+N) 0.09 % @ 1 kHz Input impedance 33.2 k ohms Damping factor 150 Current (peak to peak) 30 Amps Slew rate 14 V / )sec Dynamic headroom 1.4 dB S/N (A-weighted) 95 dB Voltage gain 28 Line voltage 120/220/240 VAC switchable Dimensions (O.A.) 17"(w) X 16"(d) X 5.75"(h) Weight 43 lb Power consumption 1220 watts max 12.
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.
B&K Components, Ltd.
13001 rev 0004
