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Groove Tubes SuPre Stereo Mic Preamp

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Availability: Out of stock


Quick Overview

Two channels of high-quality tube microphone and instrumentpreamplificationExcellent for tracking vocals, guitar, bass, keyboards, horns,strings, or any source that benefits from stereo or dua...
  • Two channels of high-quality tube microphone and instrument
  • Excellent for tracking vocals, guitar, bass, keyboards, horns,
    strings, or any source that benefits from stereo or dual-mono
    tube preamplification
  • Perfect as a superb stereo mastering preamplifier
  • Front panel: Impedance selector (300Ω/600Ω/1200Ω), Mic
    attenuation (selectable for -15dB or -30dB), High pass filter
    (75Hz), Polarity reverse, Mute, and Phantom Power (+48V), all
    individually controllable on each channel
  • Dual front panel instrument inputs (1/4”Hi-Z); Rear panel mic
    (XLR) and line (1/4” TRS) input connectors; XLR and 1/4” TRS
    output connectors
  • 72dB of gain on each mic channel, using two GT pentode/triode
    vacuum tubes per channel
  • Four custom-designed nickel core input and output transformers

Based on the design of the award-winning ViPRE Preamplifier, the SuPRE (Stereo unit Vacuum Tube Microphone and Instrument PREamplifier) is a two-channel stereo microphone and instrument preamplifier that uses a high resolution tube signal path for legendary Groove Tubes tone and response. Like the ViPRE, it features variable transformer impedance settings on each channel (300/600/1200 ohms), with 4 high quality Nickel core input and output transformers. The SuPRE provides a hefty 72dB of gain on each channel, using 4 specially selected GT pentode/triode dual element vacuum tubes (2xGT6922 dual triodes and 2x GT6CH8 pentode/triode tubes).

“Ever since the ViPRE gained tremendous respect throughout the industry, our customers have been asking for a stereo version,” says Aspen Pittman, Groove Tubes founder and CEO. “The SuPRE borrows some key features and design components from both the ViPRE and the Brick for an extremely flexible, great-sounding and yet very affordable solution for stereo mic and instrument preamplification.”

The SuPRE’s front panel packs in a lot of control features while remaining cleanly laid-out and easy to use. An input selector selects between rear panel Line or Mic inputs, while a front panel Instrument input automatically overrides the rear panel jacks when an instrument is inserted. A 3-position attenuation switch drops mic levels, selectable at 0dB, 15dB and 30dB, while dedicated switches for Polarity Reverse and 75Hz Hi-Pass Filtering are provided. SuPRE’s +48V phantom power is available individually on each channel. Large custom rotary variable attenuators control gain over the available 72dB range. Supre’s two large custom VU meters, each with individually adjustable range control, allow for 0Vu line-up with virtually any outboard gear.

Designed for both tracking and stereo mastering, the SuPRE implements precision and closely matched components to ensure perfect stereo imaging.


  • Input Impedance

    Mic: Selectable 300Ω/600Ω/1200Ω

    Balanced Line: 20kΩ

    Instrument: 22MΩ (no attenuator),

    500kΩ (with 20dB attenuator)
  • Maximum Input Level

    Mic (1200Ω, -30dB pad in): +18dBu

    Mic (1200Ω, pad out): +3dBu

    Balanced Line: +28dBu

    Instrument: +4dBu (no attenuator),

    +24dBu (with 20dB attenuator)
  • Gain Range

    Mic: 18dB - 72dB

    Balanced Line: -40dB - +32dB
  • Instrument: 36dB (no attenuator)
  • Frequency Response (XLR)

    10Hz - 50kHz, +0/-1dB
  • Equivalent Input Noise

    -126dB A-weighted
  • Maximum Output Level (XLR)

    +27dBu (@1% THD+N)
  • Output Source Impedance (XLR)

    600Ω min, >2.5kΩ recommended
  • Output Source Impedance (TRS)

    150Ω min, >1.2kΩ recommended
  • Dimensions

    19”W x 17”D x 5.25”H (3U rack)

    (48cm W x 43cm D x 13cm H)
  • Weight

    29 lbs. (13.2kg)