From Art:

The Tube Channel is a unique product. It contains three independent award-winning circuit designs: one of the finest tube microphone preamplifiers available, one of the finest optical tube compressors available, and one of the most flexible EQs you’ve ever used -- all in one unit. Developed in partnership with studio and live sound engineers, the Tube Channel possesses a “sound” that is not available from any other product on the market -- at any price! The Tube Channel was designed and constructed with the best components, assuring a lifetime of quiet, reliable performance. The Tube Channel offers:- The award winning A R T “SOUND”! - A Tube-based mic/line preamplifier- An Electro-optical compressor design - A Tube-based semi-parametric, four-band equalizer- Hand-selected preamp tubes- VCA-less compressor circuitry (i.e., transparent dynamics control)- Unique tube drive and gain reduction metering - VU output level metering- Bypassable compression and equalization circuitry- XLR balanced inputs and outputs- ¼” TS unbalanced inputs and outputs- A Custom extruded aluminum chassis - ¼” unbalanced insert points between the preamp and compressor and between the compressor and equalizer- +48V phantom power- Phase reversal- Over 70dB of gain- Detented rotary controlsCompression and limiting ratios- Selectable release time settings- >90dB dynamic range- An Internal power supply- A three year warranty- The Tube Channel was Designed and manufactured in the USA