Tube-Tech CL2A- high-end dual mono tube compressor, 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, XLR I/O, 19"/2HE.