Bose 802c Service Manual download pdf (Page 6)

The 802

C System Controller is a sophisticated signal processing device which combines the

functions of three equalizers, an automatic switching circuit, and an electronic crossover. The

802C system controller automatically selects the proper crossover function and equalization

curve for a given system application through use of a switching network operating in conjunc-

tion with the unit's output jacks. In addition to signal routing based on equalization require-

ments, the switching network indicates mode of operation on its front panel. The front panel

also includes high-cut and low-cut switches which decrease line output by 4dB at 55Hz and by

10dB at 16kHz. Sharp subsonic and ultrasonic band-limiting filters reduce power waste, stage

noise, high-frequency instability, and interference. The 802C system controller retains the

compact dimensions of its predecessor, the Bose

802E active equalizer, and fits into one

space of a standard 19" equipment rack with the optional RMK-8 Rack Mount Kit.

In an on-going process of manufacturing updates, as technology permits, Bose Corporation

has begun using SMD (surface mount devices) components on its 802C controller. The new

SMD components are such a space saving feature that this new version permits us to elimi-

nate the "piggy-back" PCB and place all electronics on one single printed circuit board. This

manual will identify the different procedures, PCB layouts, and components where necessary.

There is no difference in the operation or function between the original 802C and the

802C SMD units.

TECHNICAL DESCRIPTION

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Bose 802c Service Manual Page 6