Tube Tech CL1B


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Brands: Tube-Tech

Tube-Tech CL 1B Compressor

TUBE-TECH CL 1B Compressor features a gain-reduction element, positioned immediately after the input transformer. It is controlled by the sidechain amplifier, which also contain the two time control circuits – one for fixed and one for variable Attack/Release. The two time-controllers can either be used separately or combined. This circuit contains semiconductor OP-amps for the entire control.

The gain-reduction element is followed by a tube-based push-pull amplifier with variable gain up to 30 dB. A dedicated Bus selector with three positions (Off, Bus 1, Bus 2) is used whenever you want to link several compressors together. Input and output transformers have a static-screen between the primary and secondary wirings. Both Input and Output are balanced as well as fully floating.


  • Unique low distortion gain-reduction element
  • All tube-based push-pull amplifier
  • Multiple interconnection of several compressors via two busses
  • VU-meter for monitoring input, compression and output
  • Continuously variable attack and release time
  • Gain Range (off to +30 dB)
  • Variable Threshold (off to -40 dBu)
  • Frequency response @ -3 dB: 5 Hz to 25 kHz
  • Low noise: < -75 dBu @30 dB gain
  • Clickless bypass relay

Tech Specs

Number of Channels 1
Controls Gain, Ratio, Threshold, Attack, Release
Threshold -40dB to 0dB
Ratio 2:1 to 10:1
Frequency Response 5Hz-25kHz @-3dB
Side Chain Inserts Yes
Inputs 1 x XLR
Outputs 1 x XLR
Sidechain I/O 2 x 1/4″
Rackmount Spaces 3U
Height 5.25″
Depth 6.7″
Width 19″
Weight 9 lbs.
Manufacturer Part Number CL 1B

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