Powered volume control for distributed audio system
US6389139B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1997 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Nov 18, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2420/07
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A powered volume control is provided for a distributed audio system having a plurality of remote speakers. An amplifier or signal conditioner is provided having a dual channel amplified signal from a high impedance source. The amplified or conditioned signal is provided to a plurality of remotely located powered volume controls having high input impedance and further having internal amplifiers which provide a dual or mono-channel amplified signal having an amplitude or magnitude determined by a user variable adjustment device. The amplified signal is then provided to one or more remote speakers. Each volume control is designed for in-wall installation in a single-gang wall box and may be covered by an ornamental face plate. The system is also designed to utilize existing four conductor speaker wire for installation or retrofitting existing distributed audio systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.