Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1992-01-09
1993-10-19
Ng, Jin F.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
381 77, 381 81, 361729, 361730, 361736, H04R 2700
Patent
active
052553221
ABSTRACT:
A multi-zone audio distribution amplifier system includes positions for several stereo amplifiers which may be used as modular and cascadable amplifier units. The system is enclosed in a housing having a front panel with windows for exposing a set of led display circuits on the front side of the housing and easy access to the modular units on the rear side of the housing. Each modular amplifier unit includes a printed circuit board for an amplification circuit, a heat sink, and a loop-back port for cascading the amplifier units. An interface board includes support for the display and edge-connector receptacles for receiving each printed circuit board edge and for providing power to each of the amplifier units. Each amplifier unit is operable independent of the others, and the desired amplification may be selected by electrically cascading the amplifier units via the loop-back ports.
REFERENCES:
patent: 4481661 (1984-11-01), Spector
patent: 4953058 (1990-08-01), Harris
patent: 5043847 (1991-08-01), Deinhardt et al.
patent: 5130662 (1992-07-01), Jorgensen et al.
SSI Products, Inc.--SSI Powerflex V.
Audio Design Associates, Inc.--Preliminary Dealer Release Ads--The Evolution of Titanus THX Power.
Farinelli Robert P.
Morgan Michael
Rose Shelton R.
Golden Larry I.
Irfan Kareem M.
Lefkowitz Edward
Ng Jin F.
Square D Co.
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