Weight Tank WT-72 Preamp

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An all new tube preamp from the makers of Locomotive Audio!


The WT-72 brings you the character that the original V72 console modules are known for!

Inspired by the V72 modules originally built for the German Radio Network, the WT-72 offers 56 dB of gain, which can be driven by a microphone or line level source. The vintage modules only offered 34 dB of gain, so an additional 22 dB of gain is made in the WT-72 with small adjustments to the circuit while maintaining the most sought after tone and character we have all come to love.

The performance of a high-quality mu-metal shielded input and heavy duty output transformer as well as the output plate choke helps provide the character of its vintage inspiration!


  • Mic / Line (XLR) and High Impedance DI Input​
  • DI defeats XLR input when plugged in
  • Two EF86 equivalent tubes
  • 56 dB of gain
  • 11 Position Gain Rotary Switch
  • Polarity reverse switch
  • 36 dB pad switch (Line Select)​
  • 48 volt phantom power switch​
  • XLR input and output connections
  • American input and output transformers and plate choke​
  • Amber LED indicators for phantom power on and signal present on output (-12 dBu minimum for illumination)
  • Hand-built in USA​
  • 115v/230v AC mains option on rear
  • Internal power supply
  • 2-year warranty parts and labor

Technical Specs

  • Microphone Mode input load impedance: 1400 Ω
  • Line Mode input load impedance: 9550 Ω
  • Output impedance: 300Ω
  • 1/4" DI impedance: 500kΩ
  • 56 dB of gain
  • Frequency response: 20Hz-20kHz​
  • Maximum output level: +26dBu
  • THD+N: <1%
  • S/N ratio: >70dB
  • Dimensions: 19"w x 3.5"h x 10"d (2u rackspace)
  • Shipping Weight: 15 lbs.
Our ONE WITH EVERYTHING ZEN WARRANTY extends the standard manufacturer warranty by one year, see our ZEN WARRANTY page for details.

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