Speaker system, audio amplifier and audio system

Electrical audio signal processing systems and devices – Including phase control

Reexamination Certificate

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C381S098000, C381S099000

Reexamination Certificate

active

08050424

ABSTRACT:
Speaker system is constructed of a plurality of speakers each including a bass-reflex type cabinet. The speaker system is designed to differentiate a low-band resonance frequency between the speakers by differentiating inner cubic capacities of the speaker cabinets from each other. Audio signal of a different channel is input to each of the speakers, and only low-frequency signals of all of the channels are added together so that the added result is supplied to all of the speakers. Thus, using the differentiated low-band resonance frequencies, the speaker system permits reproduction of low-pitched sounds with a flat characteristic.

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patent: 5781642 (1998-07-01), Tanaka et al.
patent: 7292697 (2007-11-01), Tatsuta et al.
patent: 1325257 (2001-05-01), None
patent: 01-319792 (1989-12-01), None
patent: 2002-084592 (2002-03-01), None
People's Republic of China, First Office Action for Application No. 200510118750.X (Dated: Dec. 5, 2008).
Japanese Patent Office (“Notification of Reason for Refusal”), Application No. 2004-316185, dated Sep. 18, 2007 (2 pgs.).
Japananese Patent Office, “Notice of Reason for Rejection,” 2004-316185; dated Sep. 12, 2007; 2 pages.

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