Abstract
An audio mixer for combining stereo phonograph, stereo high impedance and low impedance input signals having a means for audio previewing one or more of said inputs simultaneously including a means for visually indicating which signals are being previewed, further including a means for audio previewing said signals in a monophonic signal, further including a means for combining said inputs in the final amplifier stage such that the output signal is in a monophonic state, further including a means for disabling said low impedance input from the final output means.
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