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Tegeler Audio VTRC Vari Tube Recording Channel

High-end channel strip with a flexible tube preamp, passive Pultec-style EQ, opto- and Vari-Mu compressor

Product Description

The Tegeler Audio Vari Tube Recording Channel gives your recordings a high-end boutique sound while at the same time perfect integrated into your mix. Due to the variable nature of the preamp, you can decide on color of the sound of your recording varying from clean direct to vintage fat. With the passive equalizer built after the Pultec principle, you can add silky soft highs to your recording, give your voice more volume or filter out disruptive frequencies within the area of keynotes. The combined operation of vari-mu and optical compression of the VTC is a unique worldwide feature that extends your sound spectrum with a fantastically sounding compressor tone.

Optical Compressor

An LED beams onto a light-sensitive resistor and regulates the gain depending on the level. The automatic control of the compressor timing is additionally supported through the memory effect of the resistor. The result is an open-airy and softer compression which keeps the level nicely static but hardly alters the microdynamics of the signal.

Vari-Tube Compressor

With this setting the amplification of a control tube is influenced directly. The control happens directly through the optical compressor. The result is a sound that will find its place even in a dense mix with a sinister presence while never losing its warmth.

The routing of the compressor and EQ is switchable, it is possible to switch the EQ into the sidechain of the compressor so that frequency dependent compression and de-essing are both possible. If you have a recording that has not yet been refined with the aid of the VTRC, it is possible to edit it also afterwards through the new line input. Thereby the signal does not pass through the Microphone input transformer, but through a separate transformer that has been developed for line level.

All functions of the VTRC (from Preamp to EQ to Compressor) are available to you for the processing of high level signals.

If you want to use the VTRC for stereo signals, it is possible to link them.



  • Tube device (3 Triodes)
  • Class-A circuit
  • Frequency response: 20 Hz – 20 kHz ±1.5 dB
  • Stepped Potentiometers
  • Transformer balanced inputs and output
  • Internal power supply with toroidal transformer
  • Height: 132 mm (3U), width: 483 mm, depth: 250 mm

Microphone Preamp:

  • Microphone preamp with transformer/48 V/ Phase
  • True 48 V phantom power
  • Phase switch
  • High-impedance instrument input(100 kOhm)
  • Character changeable from clean to fat


  • Low-cut: 80 - 160 Hz
  • Low-mid boost: 80-120-200-300-500-700-1000 Hz
  • Mid-cut: 200-300-500-700 Hz 1-1,5-2-3-4-5-7 kHz
  • High boost: 1,5-2-3-4-5-7-10-12-16-20-24 kHz


  • Opto compressor
  • Vari-Tube compressor (vari-µ)
  • Soft-Knee
  • Program-adaptive attack and release timing

Product Specifications

Condition New
Channels Dual-Channel
Chassis 19-inch Rack-mount
Rack Spaces 3U
Input Connectors Analog XLR
Output Connectors Analog XLR
Compression Type Optical, Variable Mu
EQ Type Pultec-Style

Product Reviews

4.5 out of 5 stars.
Review Count (2)

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Absolutely fantastic.

By James R on March 4, 2021

It’s not bad. It’s a nice flavor to have on deck. The EQ and compression stages are great. They’re actually the best part about this unit. The preamp pairs nicely with a clean condenser mic; like my Sony C100. The reason I give this a 4 star review is because of a few things that I didn’t like. The knobs feel a little cheap. Not the worst, but certainly not the best. The instrument DI doesn’t handle active pickups well; neither on bass or guitar. It’s pretty unusable unless you have an active reamp box to control the gain going into the VTRC, and even then it’s not worth the trouble. The preamp stage is a little noisier than I like, but certainly not bad or unusable. If I was just buying this just as a preamp, I honestly wouldn’t have gotten it, but the compressor and EQ make up for it. I’m not disappointed with this purchase, but just a few additions and changes to this unit would’ve made it perfect.

By Mallek on February 9, 2021

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