The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 06, 1984
Filed:
Jun. 02, 1982
Narendra C Thakkar, Roselle, IL (US);
International Jensen Incorporated, Schiller Park, IL (US);
Abstract
A sound reproduction system is disclosed which includes a main amplifier which drives two main speakers via a fader control. An auxiliary speaker powered by an auxiliary amplifier is coupled to the sound reproduction system in such a way that the loudness ratio between one of the two main speakers and the auxiliary speaker remains constant, regardless of the setting of the fader control, and the loudness between the front main speaker and auxiliary speaker can be balanced. In one embodiment, the auxiliary amplifier is coupled to a voltage divider circuit, which is in turn coupled in parallel with the rear main speaker. In a second embodiment, the auxiliary amplifier is coupled via a variable resistor to a preamplifier which is coupled in parallel with the main amplifier. The variable resistor is mechanically coupled to the fader control such that manual adjustment of the fader control automatically adjusts the variable resistor to cause the variable resistor to track the fader control.