Sound device
AssigneeRoland Corporation
InventorsKosuke Takata, Masayuki Takagi, Masato Ueno
Life of this patent
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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.
Claims15
A sound device, comprising:
- an input terminal for electronic signal input;
- a sub woofer mode comprising a low pass filter adapted to filter electronic signals input to the input terminal and to output low frequency range electronic signals;
- a full range mode comprising a crossover filter adapted to filter electronic signals input on the input terminal, and to output electronic signals with both low frequency range and high frequency range respectively;
- a switch arrangement adapted to select between full range mode and sub woofer mode;
- a primary power amplifier adapted to amplify (1) low frequency range electronic signals output from the crossover filter 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;
- a secondary power amplifier adapted to amplify high frequency range electronic signals output from the crossover filter when the switch arrangement selects full range mode;
- a woofer adapted to be operated by electronic signals amplified by the primary power amplifier, and;
- a tweeter adapted to be operated by electronic signals amplified by the secondary power amplifier.
A sound device, comprising:
- a full range mode circuit adapted to output electronic signals;
- a sub woofer mode circuit adapted to output electronic signals below a cut-off frequency;
- a switch arrangement adapted to select between full range mode circuit and sub woofer mode circuit;
- and
- at least one power amplifier adapted to amplify electronic signals output by the mode circuit selected by the switch arrangement;
- wherein the full range mode circuit includes a cross-over filter adapted to output low frequency range signals on a first output and high frequency range signals on a second output;
- wherein the at least one power amplifier includes a first power amplifier adapted to operate a woofer and a second power amplifier adapted to operate a tweeter;
- and
- wherein the switching arrangement is adapted to:
- (1) when the sub woofer mode circuit is selected, direct the electronic signals to the first power amplifier adapted to operate a woofer;
- and
- (2) when the full range mode circuit is selected, direct the low frequency range signals to the first power amplifier adapted to operate a woofer and direct the high frequency range signals to the second power amplifier adapted to operate a tweeter.
Dependencies are inferred from the claim text.