Warm Audio WA-MPX 1-channel Tube Mic/Line/Instrument Preamp.
1-channel Tube Mic/Line/Instrument Preamp with 90dB of Gain, DI Input, Tape Saturation Circuit, Highness/Lowpass Filters, and Switchable Input Transformer Impedance.
It had to happen sooner or later. Leave it to the innovators at Warm Audio to build a microphone preamp based on the tube electronics of the iconic American professional tape machine that recorded countless radio-ready hits during the golden age of analog. From the rock pioneers of the ’50s and ‘60s to today’s sound-savvy artists, the legendary “351” has been the secret sauce in the signal chain that delivers the vintage-flavored warmth and color we all seek in our own recordings.
The Warm Audio WA-MPX 1-channel tube mic/line/instrument preamp incorporates an original-spec circuit design, authentically reproducing the coveted analog sonics of the original.
Handwired and hand assembled using only premium, all-discrete components, including custom-wound, original-spec large-core CineMag USA transformers, the WA-MPX serves up instant “sounds-like-a-record” punch for tracks that blast right out of the speakers. But there’s so much more to this amazing preamp that makes it indispensable to modern hybrid studio workflows.
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Authentic reproduction of the coveted “351” tape machine tube preamp
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Fully discrete, handwired and handbuilt construction with 90dB of clean analog tube gain
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Selectable Tape saturation adds harmonic distortion and natural compression for authentic analog grit
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Custom-wound, large-core CineMag USA transformers
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Tone switch modifies mic input transformer impedance for mic optimization or extra analog color
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600Ω output attenuator
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Vacuum tube complement: premium 12AX7 (x 2), 12AU7 (x 1)
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Preamp Gain: 70dB, 90dB with High Gain engaged
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High Gain control engages third tube in the circuit, adding 20dB of clean gain for low-output mics and quiet sources
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48V phantom power; polarity switch
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80Hz highpass filter controls unruly low frequencies
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2kHz lowpass filter focuses power and warmth on mids for added punch
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Inputs: XLR Mic, TRS Line, TS Instrument
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Outputs: line-level XLR and TRS
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VU Meter Level Indication
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Frequency response: 20Hz–20kHz
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Each unit hand inspected and tested at Warm Audio HQ in Austin, Texas
