Tube-Tech LCA2B Tube Compressor


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Product Code: 9999-08870
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The Tube-Tech LCA2B Tube Compressor is one of the most versatile and powerful compressors on the market. From powerful bus compression to instrument and voice compression, there's nothing the LCA2B can't handle!

The Tube-Tech LCA2B Tube Compressor is a two-channel compressor with an independent compressor and limiter per channel.

The unit is all tube based (except for the power supply and side chain circuit). The VCA (1 dual triode) is placed between the input transformer and the output stage (2 dual triodes).

The audio signal is picked up after the VCA and fed to the side chain circuit. The control signal from the compressor and from the limiter is combined and sent to the link switch and to the control amp, which feeds the VCA. The two bi-directional link busses are accessible at two 1/4" stereo jack sockets on the rear panel. The channels can be linked together for stereo applications and also linked to other LCA 2B's via the two link busses and a standard stereo jack/jack cord.

The compressor has six att/rel presets (Fairchild time constants) as well as manual control. The limiter att/rel is fixed. The LED display is fed from the control amp. The limiter LED is fed from the limiter buffer.The audio path is fully symmetrical from input to output. Input and output have fully floating transformers. All DC voltages are stabilized, except the anode voltage for the output stage.

The Tube-Tech LCA2B Tube Compressor is one of the most versatile and powerful compressors in the market. The compressor is using a Tube as the VCA (Voltage controlled amplifier).

There's literally nothing the LCA2B can't handle; From powerful bus compression to instrument and voice compression. Due to the LCA2B's very fast and smooth attack ability, it's perfect for serious drum compression.

The LCA2B is designed to be the Tube-Tech Fairchild 670. It's NOT the same circuit, but it is designed with the Fairchild in mind, delivering similar action but sounding a bit more open. The fixed attack/release constants are duplicates of the Fairchild constants.

When you want even more control, power and wildness than our famous CL 1B can deliver, try the LCA2B. The LCA2B is equally well suited for use in the studio or on the road.

Tube-Tech LCA2B Tube Compressor Features

  • Separate compressor and limiter
  • Frequency response @ -3 dB: 5 Hz to 50 Khz
  • Low noise: < -85 dBU @ 10 dB gain
  • Output gain control
  • Clickless bypass relay
  • LED display for gain reduction
  • Compressor
    • Variable ratio from 1.6:1 to 20:1
    • Variable threshold: off to 10 dBu
    • Selection between six presets and manual controlled att/rel
  • Limiter
    • Variable threshold: off to 0 dBu
    • On/off switch
    • LED indication

Tube-Tech LCA2B Tube Compressor Specifications

  • Impedance
    • Input: 5 kOhm
    • Output: <60 Ohm
  • Frequency response@ -3dB 5 Hz to 50 kHz
  • Distortion THD+N @ 40Hz
    • 0 dBU 0.15 %
    • +10 dBU 0.15 %
    • Max. output: +26 dBU <1 %
    • Max. input: +21 dBU <1 %
  • Noise Rg=200 Ohm
    • 22 Hz-22 kHz: Output Gain @0 dB < -85 dBU, Output Gain @+10 dB < -80 dBU
    • CCIR-468-4: Output Gain @+0 dB < -78 dBU, Output Gain @+10 dB < -73 dBU
  • Cross talk @ 10 kHz: < - 70 dB
  • CMMR @ 10 kHz: < - 60 dB
  • Gain: -6dB to +10 dB
  • Compressor
    • Ratio: 1.6:1 to 20:1
    • Threshold: off to -10 dBU
    • Attack: 0.3 ms to 70 ms
    • Release: 70 ms to 2 s
  • Limiter
    • Ratio: 20:1
    • Threshold: off to 0 dBU
    • Attack: 0.8 ms
    • Release: 0.5 s
  • Tubes
    • ECC 81 selected: 2 pc
    • ECC 82: 2 pc
    • ECC 83: 2 pc
  • Dimensions
    • Height: 2 units, 88 mm 3.5"
    • Width: 483 mm 19.0"
    • Depth: 205 mm 8.1"
  • Weight
    • Net: 6.5 kg 14.3 lbs
    • Shipping: 5.9 kg 13.0 lbs
  • Power Requirements
    • @ 115 V/230 V, 50-60 Hz: 30-45 W

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