Two-channel tube preamp can handle very low levels as very high.

Dimensions: 6.5 "D x 19.0" W x 3.5 "H
Frequency Response: 20Hz to 40kHz (+0,-1dB)
Dynamic Range:> 100dB (20Hz to 20kHz)
CMRR:> 90dB (typical @ 1kHz)
THD: <0.1% (typical)
Equivalent Input Noise:-132dB (XLR to XLR 'A' weighted)
Maximum Input Level: +17 dBu (XLR), +20 dBu (1 / 4 ")
Input Impedance: 1.67k ohms (XLR), 840k ohms (1 / 4 ")
Maximum Output Level: +28 dBu (XLR), +22 dBu (1 / 4 ")
Output Impedance: 600 ohms (XLR), 300 ohms (1 / 4 ")
Maximum Gain XLR to XLR: 72dB
Controls: Input and Output level controls
Controls: High Pass Filter (variable from 150 Hz to 7 Hz)
Controls: 20 dB Gain, Phase Reversal, Phantom Power switches with status LEDs
Connections: Balanced XLR (pin 2 hot) inputs and outputs
Connections: Unbalanced 1 / 4 "(TS) inputs and outputs

All this in a 19 "two units high.

UTILIZATION

Exceptional sound quality
VU and LED metering multi-point level
12AX7A/triple differential hybrid circuit design
> 100dB dynamic range

SOUND QUALITY

As you can see from reading above that this device is great.
The manual job consists of only 10 page is well designed than enough to understand everything. However, even without the manual a baby could get it working so everything is clear is simple.
The sound is superb in all cases whatsoever over voice or a complete mix.

OVERALL OPINION

I have one for three years and it works perfectly.
Must say that they are at ART Pros!