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Tube Tech CL 2A Dual Opto Compressor

Tube Tech CL 2A front view

The Tube Tech CL 2A Stereo Compressor with two independent linkable optical compressors. The CL2A is a great compressor for use on keyboards, guitars, vocals or even accross the mix bus.

The TUBE-TECH CL 2A Two-Channel Optical Compressor is an all tube based compressor / limiter targeted at two-channel studio recordings.

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.

CL2A Features

  • Low-distortion optical gain reduction element
  • All-tube based push-pull amplifier
  • Frequency response @ -3 dB: 5 Hz to 60 kHz
  • Low noise: < -80 dBU @ 10 dB gain
  • CMRR: > 60 dB @ 10 kHz
  • Variable ratio from 1.5:1 to 10:1
  • Continuously variable attack and release times
  • Output gain: Off to +10 dBU
  • Variable threshold: Off to -20 dBU
  • VU meters show output or compression
  • Linkable for stereo applications
  • Interconnection of several compressors via two busses
  • Clickless In/Out relay
  • Conductive plastic potentiometers
  • Gold plated switches
  • Input and output are transformer balanced and fully floating

CL2A Sound Examples

Female Vocal (bypass)

Female Vocal (CL 2A)

 

Male Vocal (bypass)

Male Vocal (CL 2A)

 

Guitar (bypass)

Guitar (CL 2A)

 

Bass A (bypass)

Bass A (CL 2A)

 

Bass B (bypass)

Bass B (CL 2A)

Tube Tech CL 2A 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