JPS6195107U

JPS6195107U -

Info

Publication number: JPS6195107U
Application number: JP18060584U
Authority: JP
Priority date: 1984-11-28
Filing date: 1984-11-28
Publication date: 1986-06-19

Description

[Brief explanation of the drawing]

第１図はこの考案の実施例による2ch,4ch切換
型アンプを示す図、第２図は従来の２ｃｈ／４ｃ
ｈ切換型アンプを示す図である。１１…フロントＬｃｈアンプ、１２…リアＬｃ
ｈアンプ、１３…フロントＲｃｈアンプ、１４…
リアＲｃｈアンプ、１５…フロントＬｃｈスピー
カー、１６…リアＬｃｈスピーカー、１７…フロ
ントＲｃｈスピーカー、１８…リアＲｃｈスピー
カー、１９…Ｌｃｈフロントスピーカー２ｃｈ／
４ｃｈ切換スイツチ、２０…Ｌｃｈリアスピーカ
ー２ｃｈ／４ｃｈ切換スイツチ、２１…Ｒｃｈフ
ロントスピーカー２ｃｈ／４ｃｈ切換スイツチ、
２２…Ｒｃｈリアスピーカー２ｃｈ／４ｃｈ切換
スイツチ、２３…Ｌｃｈアンプ用２ｃｈ／４ｃｈ
切換スイツチ、２４…Ｌｃｈアンプ用２ｃｈ／４
ｃｈ切換スイツチ、２５…Ｒｃｈアンプ用２ｃｈ
／４ｃｈ切換スイツチ、２６…Ｒｃｈアンプ用２
ｃｈ／４ｃｈ切換スイツチ、２７…音場効果回路
、２８…音場効果ＯＮ／ＯＦＦスイツチ。 Fig. 1 shows a 2ch/4ch switching type amplifier according to an embodiment of this invention, and Fig. 2 shows a conventional 2ch/4c type amplifier.
FIG. 3 is a diagram showing an h-switching amplifier. 11...Front Lch amplifier, 12...Rear Lc
h amplifier, 13...Front Rch amplifier, 14...
Rear Rch amplifier, 15...Front Lch speaker, 16...Rear Lch speaker, 17...Front Rch speaker, 18...Rear Rch speaker, 19...Lch front speaker 2ch/
4ch changeover switch, 20...Lch rear speaker 2ch/4ch changeover switch, 21...Rch front speaker 2ch/4ch changeover switch,
22...Rch rear speaker 2ch/4ch selection switch, 23...2ch/4ch for Lch amplifier
Changeover switch, 24...2ch/4 for Lch amplifier
Channel changeover switch, 25...2ch for Rch amplifier
/4ch changeover switch, 26...2 for Rch amplifier
ch/4ch changeover switch, 27...sound field effect circuit, 28...sound field effect ON/OFF switch.

Claims

[Scope of utility model registration request]

When driving 4ch, the L and R stereo signals are driven by the L and R front amplifiers to drive the L and R front speakers, and the L and R stereo signals are passed through the sound field effect circuit and driven by the L and R rear amplifiers. Drives the rear speakers for L and R, and
When driving, the switch switches the rear amplifier for L and R so that it becomes a reverse phase amplifier with respect to the output of the front amplifier for L and R.
, the front speaker for R is switched to have a BTL connection to the front amplifier and rear amplifier for L and R, and the sound field effect circuit is disabled to create a 2-channel BTL amplifier configuration. Features 2ch/4ch switching type amplifier.