Warm Audio WA-MPX Microphone Pre-Amp

Availability: Out of stock

  • The Warm Audio WA-MPX Microphone Pre-Amp, enjoy the same vintage warmth and colour in your recordings as the AMPEX 351 Tape machine.
  • Enjoy a wider range of analogue tone with improved power and versatility.
  • Experience authentic vintage sound with premium components and hand-wired construction.
  • Fine-tune your tone with selectable, all-analogue tape saturation.
  • Refine your tone further with hi-pass (80Hz) and low-pass (2kHz) filters.
Our price £701.00



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Warm Audio WA-MPX Microphone Pre-Amp

The Warm Audio WA-MPX microphone preamp is ideal for musicians, producers, audio engineers, and home studio enthusiasts who want to enhance the quality of their recordings using outboard equipment.

The WA-MPX is great for capturing warm clean and transparent tones for vocals, acoustic instruments, and drums, but also delivers an authentic vintage tube-saturated tone to your recordings, allowing you to add warmth, character, and depth.


Authentic Reproduction of the Most Revered Tape-Era Tube Mic Preamp

The WA-MPX represents a faithful replication of one of the most acclaimed microphone tube preamps, the legendary AMPEX 351 Tape machine, which played a pivotal role in the creation of rock and roll and radio-friendly hits.

In the era of tape recording, this classic tube preamp was a fixture in the signal chain of successful recordings by renowned artists like Elvis Presley, Les Paul, and Bing Crosby, a sound that continues to captivate today's top musicians.

Equipped with high-quality components, a circuit design that is true to the original, and tape saturation control, the WA-MPX accurately emulates the analogue tone of the original preamp, adding a vintage warmth and colour to your sound.


Hi-Pass (80Hz) & Low-Pass (2kHz) Filters to Refine Tone

The 2kHz low-pass filter allows you to further shape and focus your tone, dialling in ultimate midrange warmth & punch. The 80Hz hi-pass filter helps remove unwanted bass noise from unruly sources. By cutting out this unwanted noise, you can improve the overall clarity and quality of your sound.


Hand-Inspected & Tested at Warm Audio HQ in Austin, Texas

When it comes to sound quality, every detail matters. The WA-MPX has been carefully inspected at Warm Audio Headquarters in Austin, Texas by trained engineers & musicians with a passion for helping you sound your best.


Popular Uses

With three tubes per channel, it delivers a clean and wide-open tube tone that can be dialed in to create natural harmonic distortion and compression as the tubes are pushed. Additionally, users can engage an all-analogue tape saturation by flipping the "Tape Sat" switch. The combination of vintage sound and modern connectivity makes it perfect for use in any hybrid rig.


If you require two channels, check out the WA-2MPX.


Key Benefits:

  • Hand-built construction with 3 tubes per channel for the ultimate analogue tone.
  • Selectable tape saturation adds harmonic distortion and natural compression.
  • 90dB of analogue tube gain per channel.
  • Custom-wound, large-core CineMag USA transformers.
  • 48v phantom power & polarity switch.
  • Classic Warm Audio tone control that alters the input transformer impedance adding extra analogue colour.
  • 80Hz high-pass filter to control unruly bass frequencies.
  • 2kHz low-pass filter to focus pre-amp power and warmth on mids for added punch.
  • Inputs: XLR mic, TS instrument & TRS line.
  • Outputs: XLR / TRS line level
  • VU meter level indication
  • Frequency response: 20Hz-20kHz
  • Aluminium faceplate, steel chassis, and vintage Bakelite-style knobs
  • Internal IEC 115v/230v power inlet
  • Weight: 3.7 kg