Tube Tech LCA2B


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Brands: Tube-Tech

Tube-Tech LCA 2B Compressor

Tube-Tech LCA 2B 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 LCA 2B can’t handle; From powerful bus compression to instrument and voice compression. Due to the LCA 2B’s very fast and smooth attack ability, it’s perfect for serious drum compression.

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 CL1B can deliver, try the LCA 2B.

The LCA2B is equally well suited for use in the studio or on the road.

The TUBE-TECH LCA 2B is a two-channel unit 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.

Product Features


Variable ratio from 1,6:1 to 20:1
Variable threshold: off to 10 dBu
Selection between six presets and manual controlled att/rel


Variable threshold: off to 0 dBu
On/off switch
LED indication


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

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