Sound device

Details Sound device Sound device

2007-01-17

2011-12-13

Faulk, Devona (Department: 2614)

Electrical audio signal processing systems and devices

Including frequency control

Having crossover filter

C381S098000, C381S001000, C381S017000, C381S059000, C381S018000

Reexamination Certificate

active

08077881

ABSTRACT:
A sound device is provided with an input terminal for electronic signal input; a low pass filter adapted to filter electronic signals input to the input terminal and to output low frequency range electronic signals, a switch arrangement adapted to switch between full range mode and sub woofer mode, a power amplifier adapted to amplify (1) electronic signals input from the input terminal when the switch arrangement selects full range mode, and (2) electronic signals output from the low pass filter when the switch arrangement selects sub woofer mode, and a speaker adapted to be operated by electronic signals amplified by the power amplifier.

REFERENCES:
patent: 3927279 (1975-12-01), Nakamura et al.
patent: 6741712 (2004-05-01), Bisgaard

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