Instruction/ maintenance manual of the product 220M B&K
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Reference 220M Sin g le Channel Amplifier OWNER’S MANUAL B & K Components Ltd. 13005 rev 0004.
13005 rev 0004 B&K Components, Ltd., 2100 Old Union Road, Buffalo, New York 14227.
Page 1 13005 rev 0004 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 - 5 Co.
Page 2 13005 rev 0004 SAFETY PRECAUTIONS PLEASE READ BEFORE INSTALLING WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.
Page 3 13005 rev 0004 The Reference 220M's purpose and function The Reference 220M is a compact, very efficient, single channel power amplifier. It is designed to be used in all types of audio or audio/video systems.
Page 4 13005 rev 0004 Rear Panel View 1. AC fuse holder 5. RCA input (unbalanced) 2. AC Input receptacle 6. Level controls** 3. Speaker outputs 7. Amplifier control muting input/output 4. Balanced Inputs ** OPTIONS AVAILABLE FOR THE Reference 220M AMPLIFIER Rear panel description 1.
Page 5 13005 rev 0004 5. RCA inputs- For connecting signal patch cables (interconnects) from the preamplifier to the amplifier to pass signal. 6. Level controls - Option available for the Reference 220M amplifier. For adjusting the input level to the amplifier.
Page 6 13005 rev 0004 )LJXUH& If the control function is desired, each unit in the system must remain connected at all times and the control must be enabled. To enable the control function, the CTRL ENABLE button must be out for each controllable amplifier in the system.
Page 7 13005 rev 0004 )LJXUH' Outputs Five wa y bindin g posts are provided. One pair for each channel. The y are desi g ned to accept a banana-t y pe plu g or spade lu g connector (shown below) and are color coded for eas y identification. The red (+) post should alwa y s be connected to the speakers (+) jack.
Page 8 13005 rev 0004 Inputs Unbalanced - RCA type connectors accept line input from the preamplifier’s unbalanced output connectors. There are two input connectors, that may be used to connect the amplifier to the preamplifier. The Channel 3 input is used for normal operation.
Page 9 13005 rev 0004 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.
Page 10 13005 rev 0004 Connect the wires from your speakers to the appropriate output on the amplifier. It is absolutely essential that you observe correct polarity in these connections.
Page 11 13005 rev 0004 Troubleshooting PROBLEM POSSIBLE CAUSE POSSIBLE SOLUTION No sound (‘on’ LED not illuminated) 1. Power cord not plu gg ed in. 2. Power off at AC source. 3. AC power inlet fuse blown or faulty. 4. Control switch in the wron g position.
Page 12 13005 rev 0004 Reference 220M SPECIFICATIONS Power rating: 8 ohms 250 watts @ 1 kHz 4 ohms 400 watts @ 1 kHz Frequency response 5 Hz - 45 kHz Input sensitivity 1.4 Volts THD (S+N) 0.09 % @ 1 kHz Input impedance 33.2 k ohms Damping factor 750 Current (peak to peak) 150 Amps Slew rate 14 V / ) sec Dynamic headroom 1.
Page 13 13005 rev 0004 Limited Warrant y B&K Components Ltd., referred to herein as B&K, warrants your B&K equipment a g ainst all defects in material and workmanship for a period of five years from the date of purchase. This warranty applies only to the ori g inal purchaser and only to equipment in normal residential use and service.
13005 rev 0004 B&K Components, Ltd. 2100 Old Union Road Buffalo, New York 14227 716-656-0023 www.bkcomp.com.
An important point after buying a device B&K 220M (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought B&K 220M yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data B&K 220M - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, B&K 220M you will learn all the available features of the product, as well as information on its operation. The information that you get B&K 220M will certainly help you make a decision on the purchase.
If you already are a holder of B&K 220M, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime B&K 220M.
However, one of the most important roles played by the user manual is to help in solving problems with B&K 220M. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device B&K 220M along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
