Tube-Tech CL2-A, Dual mono tube compressor, Optical gain reduction element, Channels for linkable stereo operation, Dual VU meters for indicating output level or compression, Adjustable output level, Frequency response: 5 - 60,000 Hz, Noise-free bypass via relay, Gold-plated switches, Conductive plastic potentiometer, Inputs and outputs: XLR balanced, Dimensions: 19"" x 2U x 205 mm, Weight: 5.8 kg