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Summary of Contents for B&K Reference 220M
- Page 1 Reference 220M Single Channel Amplifier OWNER’S MANUAL B & K Components Ltd. 13005 rev 0004...
- Page 2 B&K Components, Ltd., 2100 Old Union Road, Buffalo, New York 14227 13005 rev 0004...
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Page 3: Table Of Contents
Table of contents Safety Precautions Purpose and function Design and construction Features Rear panel view Rear panel description Control muting Level controls Outputs Inputs System installation Making the connection Troubleshooting Care and cleaning Specifications Warranty Accessories included: Manual and Power cord Page 1 Page 2 Page 3... -
Page 4: Safety Precautions
Turn amplifier ‘off’ when plugging in or unplugging input and speaker cables!!! The Reference 220M is equipped with raised feet so that continuous ventilation can be maintained. They help to maintain acoustic feedback into the amplifier at a minimum. -
Page 5: Purpose And Function
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. The Reference 220M utilizes high quality electronic circuitry to achieve an environment wherein a detailed, transparent, and highly musical sound can be realized. -
Page 6: Rear Panel View
2. AC Input receptacle 3. Speaker outputs 4. Balanced Inputs ** OPTIONS AVAILABLE FOR THE Reference 220M AMPLIFIER 1. AC fuse holder - 2. AC Input receptacle - For attaching the supplied AC power cord to the 3. Speaker outputs - 4. -
Page 7: Control Muting
The preamplifier’s control output, such as is provided with B&K series preamplifiers, can be utilized to provide a control signal to the Reference 220M. If more than one amplifier is being controlled, the control signal can be extended to include each successive unit by simply running a 3.5mm mini-jack cable from the CTRL OUT... -
Page 8: Level Controls
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. For more information on the amplifiers output status under various control conditions, refer to the table below. -
Page 9: Outputs
Banana jack Here is a typical amplifier setup )LJXUH' The Reference 220M amplifier has two sets of binding posts on it. They are paralleled inside the amplifier. The Channel 3 output is used for normal operation. The amplifier comes standard with a Channel 1 and Channel 3 output. The Channel 3 output is used for normal operation, but you can use the Channel 1 output to connect to another speaker in parallel. -
Page 10: Inputs
Balanced - XLR type connectors accept line input from the preamplifier’s balanced output connectors. The Reference 220M has balanced line inputs. Balanced cable connector Operation - For balanced operation, ensure the balanced switch between the balanced inputs on the rear of the amplifier is in the ‘on’... -
Page 11: 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. - Page 12 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. Example: If you connect your right front output of your preamplifier to channel 1 input on the amplifier, remember to connect your right front speaker wires to channel 1's outputs.
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Page 13: Troubleshooting
PROBLEM No sound (‘on’ LED not illuminated) No sound on some or all selected channels (‘on’ LED illuminated) Sound lacks direction, bass weak Loud hum or buzz on one or more channels Low output from amplifier Channel sounds distorted and low in output ** Note : If unit continues to blow power inlet fuses, FUSE!!,... -
Page 14: Specifications
Reference 220M SPECIFICATIONS Power rating: 8 ohms 4 ohms Frequency response Input sensitivity THD (S+N) Input impedance Damping factor Current (peak to peak) Slew rate Dynamic headroom S/N (A-weighted) Voltage gain Line voltage Dimensions (O.A.) Weight Power consumption Replacement fuses... -
Page 15: 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. Defective equipment must be returned to B&K, prepaid, accompanied by sufficient payment to cover the cost of return shipping and handling, and will be repaired or replaced at the discretion of B&K whose decision as to the method of reparation will be final. - Page 16 B&K Components, Ltd. 2100 Old Union Road Buffalo, New York 14227 716-656-0023 www.bkcomp.com 13005 rev 0004...
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