Patent ID: 7095862

Claim:
A headphone amplifier comprising: a housing having a first side; an audio signal input jack, an audio signal output jack, an on/off switch and a volume control positioned on said first side of the housing; a circuit board positioned inside of the housing; a battery compartment positioned inside of the housing and separated from said circuit board by a battier; a first channel audio amplification circuit positioned on a first side of the circuit board and adapted to amplify a first channel audio input signal; a second channel audio amplification circuit positioned on a second side of the circuit board adapted to amplify a second channel audio input signal; the first channel circuit adapted to re&eive the second channel audio input signal and to amplify the second channel input signal to a predetermined degree of amplification less than the amplification of the first channel input signal; the second channel circuit adapted to receive the first channel audio input signal and to amplify the second channel input signal to a predetermined degree of amplification less than the amplificalion of the first channel input signal.