Rear Panel - B&K Reference 20 Plus Owner's Manual

The processor's back panel is organized into groups of inputs and outputs for audio and video as shown below.
See back of this manual for an enlarged view.
1. AC fuse holder - Holds the AC Line fuse. Replace only with same type and value.
2. AC input receptacle - For attaching the supplied AC power cord to the processor.
3. RS-232 input - Computer interface applications.
4. Zone 1 (A) and Zone 2 (B) audio outputs - Variable level outputs to your external amplifiers.
5 & 6. Antenna inputs - Connections for the AM and FM antennas.
7. Line inputs - Connections from your audio/video sources.
Red RCA jacks
White RCA jacks
Yellow RCA jacks
4 pin din jacks
8. Line level A/V outputs – Switched fixed level A/V outputs to an audio or video recorder.
9. Zone 1 (A) and Zone 2 (B) video outputs - Outputs to your video monitors.
10. IR in - Accepts input from external IR receptors. Connect an IR repeater ("home run") to IR IN for controlling
the processor. This method of control is useful when the front IR receptor is blocked (for example, by a cabinet
door) or to control the processor from another room. This input is typically used in place of an emitter attached to
the front panel.
11. Control outs - Outputs that allow you to remotely control external devices. (See "Making The Connection").
12. Optical and Coax Digital output - Zone 1 (A) optical and 1/8" mini-plug coax output to carry digital
information from the selected digital input of the processor out to digital recorders, personal computers, etc.
13. Surround outputs - Variable level outputs for driving external power amplifiers or powered speakers.
14. Optical Digital inputs - Optical digital inputs are used to connect digital audio signals from your source to the
processor. The incoming signal may be PCM, Dolby Digital or DTS.

REAR PANEL

- right analog audio
- left analog audio
- composite video
- S-video
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