Mackie HM-400 Headphone Amplifier
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Mackie HM-400 Headphone Amplifier 4-Channel Headphone Amplifier L/R Main Stereo Inputs plus L/R stereo outputs 7 segment LED metering per channel plus Main 3 headphone outputs per channel Aux input on each channel with balance control to mix main and aux signal Mute and stereo/2-ch mode switches per channel 12 total headphone outputs