Dual Optical Compressor

The TUBE-TECH CL 2A Dual Compressor features two independent optical compressors. The optical gain reduction element is placed after the input transformer and then followed by an all tube-based output amplifier with a +10 dB gain. A switch with three positions (Link 1, Off, Link 2) is used whenever you want to use the two separate compressors in stereo mode or link several compressors together. The two link busses are identical.

Both Input and Output are balanced and have fully floating transformers with a static screen. The power supply and the sidechain circuit is based on a solid state circuit. With the exception of the anode voltage for the output stage all DC voltages are stabilized.

Product Features

• Optical gain reduction element
• Linkable for stereo applications
• Dual VU-meters showing output or compression
• Variable attack and release with a 1.5:1 to 10:1
• Output Gain (off to +10 dB)
• Frequency response @ -3 dB: 5 Hz to 60 kHz
• Low noise: < -80 dBu @10 dB gain
• Conductive plastic potentiometers
• Gold plated switches
• Clickless bypass relay

Hear the CL2A in the Tube-Tech Flash Player

Online Manual
High Resolution Image

Specifications

• Impedance
  Input: 5 kohm
  Output: < 60 ohm
• Frequency response @ -3 dB: 5 Hz to 60 kHz
• Distortion THD+N @ 40 Hz
  0 dBu: < 0,15 %
  +10 dBu: < 0,15 %
• Noise Rg=200 ohm
  Output Gain @         0dB         +10 dB
  22 Hz-22 kHz:    < -80 dBu   < -80 dBu
  CCIR-468-4:      < -70 dBu   < -70 dBu
• Cross talk @ 10 kHz: < -60 dB
• CMRR @ 10 kHz: < -60 dB
• Max. output @ 1 % THD+N: > +26 dBu
• Gain: off to +10 dB
• Compressor
  Ratio: 1.5:1 to 10:1
  Threshold: off to -20 dBu
  Attack: 3 ms to 60 ms
  Release: 60 ms to 2 s
• Tubes
  ECC 82 2 pc
  ECC 83 2 pc
• Dimensions
  Height:2 units 88 mm 3.5"
  Width: 480 mm 19.0"
  Depth: 205 mm 8.1"
• Weight
  Net: 5.8 kg 12.8 lbs.
  Shipping: 7.1 kg 15.6 lbs.
• Power requirements
  @ 115 V/230 V, 50-60 Hz: 35 W