Speaker unit and sound reproduction apparatus using the same
US6819767B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2000 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Sep 13, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R5/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sound reproduction apparatus includes a left channel speaker apparatus for receiving a left-channel sound output signal of a sound source, a right channel speaker apparatus for receiving a right-channel sound output signal and a center speaker apparatus disposed at the center, or in the central front space between the speaker apparatuses for the left and the right channels. A speaker unit of the center speaker apparatus is provided with a left-channel voice coil for receiving the left-channel sound output signal and a right-channel voice coil for receiving the right-channel sound output signal; and these two voice coils are disposed co-axially. The center speaker apparatus is formed only of the above-described speaker unit, a front baffle and a cabinet. The amplifying unit that was indispensable in the conventional configuration has been totally eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.