WA-412 Four Channel Mic Pre-Amp by Warm Audio| J.W. Pepper Sheet Music
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Manley Labs Force 4-Channel Vacuum Tube Microphone MFRC B&H
RME QuadMic II 4-Channel Microphone Preamp QUADII B&H Photo Video
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Focusrite ISA 428-MK2 4-Channel Microphone Preamp – Sonic Circus
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SM Pro Audio PR4V 4-Channel Microphone Preamp | zZounds
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Warm Audio WA-412 4-Channel Mic Pre w/ DI - Westlake Pro
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Sytek MPX-4ii 4-Channel Mic Preamp with 2ch Burr-Brown OP-amps
