Tube Driven USB Audio Interface

US ART announces the two-channel USB Dual Tube Pre 01/07/11

ART has released what they say is the first true two-channel tube preamp that is also a professional quality USB audio interface. Here's what they have to say about it...
Designed for convenience, the all new USB Dual Tube Pre allows direct connection of any microphone, instrument, or line level source directly to your computer via USB 2.0 or S/PDIF input.
The ultra-compact design of the ART USB Dual Tube Pre makes it the perfect audio solution for mobile recording applications or for desktop studios where space may be at premium.
Fully featured, the ART USB Dual Tube Pre offers independently controlled high pass filters, phase inversion, gain and lever controls per channel. An advanced two channel switchable opto-compressor circuit prevents overload at the input, and delivers added warmth and character to recorded tracks.
Additional S/PDIF output is selectable between 44.1k and 48k sample rates, making the USB Dual Tube Pre the ideal companion two-channel expander to any digital recording hardware with S/PDIF I/O.
USB Dual Tube Pre Features

Two channel Tube based Mic/Instrument preamp computer interface
Extremely low noise discrete front end with variable input and output controls
Advanced optical output compressor to simplify recording and prevent overload
Balanced XLR for lo-Z applications and 1/4-inch hi-Z inputs for instrument DI applications
Selectable Dual or Stereo operation of output controls
Switch selectable Inserts on each channel
Insert jacks provide a preamp direct out for each channel
Stereo/ Dual operation of Optical Compressor
Mono switch for single input monitoring
S/PDIF Sample Rate switch selectable between 44.1K and 48K
Precision LED metering of both the preamp and A/D sections
Built-in low noise +48 Volt phantom power supply
Compact, stackable all aluminum chassis