CMfront

The TUBE-TECH CM 1A Compressor features an optical gain-reduction element, positioned immediately after the input transformer. It is controlled by the sidechain amplifier, which also contains 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 set.

A tube-based push-pull amplifier follows the gain-reduction element with variable gain up to 30 dB. A dedicated Bus selector with three positions (Off, Link 1, Link 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 for low noise. Input and Output are transformer balanced and fully floating.

Product Features

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

Manual
High Resolution Image

Impedance
Input: 600 ohm
Output: < 60 ohm
Frequency response @ -3 dB: 5 Hz to 25 kHz
Distortion THD+N @ 40 Hz 0 dBu: < 0,15 %
+10 dBu: < 0,15 %
Noise Rg 200 ohm
Output Gain @ 0dB
22 Hz-22 kHz: < -85 dBu
CCIR-468-4: < -75 dBu
CMRR @ 10 kHz: < -60 dB
Max. output @ 1 % THD+N: > +26 dBu
Gain: off to +30 dB
Compressor
Input: Ratio: 2:1 to 10:1
Threshold: off to -40 dBu
Attack: 0,5 ms to 300 ms
Release: 0,05 s to 10 s
Tubes ECC 82 1 pc
ECC 83 1 pc
Dimensions
Height: 3 units 176 mm 6.93"
Width: 500 mm 1.97"
Depth: 220 mm 8.66"
Weight
Net: 1.2 kg 2.6 lbs.
Shipping: 1.8 kg 4.0 lbs.
Power requirements 12 W