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Tube-Tech
LCA 2B Dual Mono/Stereo Tube Compressor/Limiter
Mfr Catalog # LCA2B • B&H Catalog # TULCA2B
The LCA 2B is a two channel, all tube unit (except the power supply and sidechain circuit) with an
independent compressor and limiter per channel. 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 into the sidechain circuit. The control signal from the
compressor and limiter is combined and sent to the link switch, and to the control amp, which feeds the VCA.
The two channels of the LCA 2B can be linked together for stereo applications, and also linked to other units
via the two link busses.
The compressor has six attack/release presets, based on the Fairchild 670, in addition to manual control. The
audio path of the LCA 2B is fully symmetrical from input to output, and both input and output have fully floating
transformers. All DC voltages are stabilized except the anode voltage for the output stage.
Key Features
• Dual channel all tube compressor/limiter
• Fairchild 670 attack/release presets as well as manual control
• Multiple interconnection of several compressors is possible via two busses
• Clickless IN/OUT key
• LED display for gain reduction
Function
Compressor/Limiter
Number of Channels
2
Inputs
2 x XLR
Outputs
2 x XLR
Maximum Input Level
Not specified by manufacturer
Compression Threshold
-10dBU to off
Compression Ratio
1.6:1 to 20:1
Attack Time
3mSec to 70mSec
Release Time
0.07 to 2 Sec
Gate Threshold
Not applicable
Gate Rate
Not applicable
Maximum Output Level
+26dBU
Make-Up Gain
-6dB to -10dB
Frequency Response
5Hz to 50kHz
Dynamic Range
Not specified by manufacturer
Noise
<-80dBU
Dimensions
2U rack mount
Specialties
Very low noise