Specifications

 

The Rhythm 1.4 preamplifier, from Backert Labs

Line stage tubed preamp
5 inputs, 4 outputs, 1 “Rec Out”, 1 Home Theater Bypass (2 inputs are fully balanced XLR, 3 inputs are RCA) (2 outputs are fully balanced XLR, 2 are RCA)
Balance control, mute switch, stereo/mono switch, remote volume control with mute button
Tube complement:  2 X 12au7, accessible via tube access door on top panel
Phase:   correct phase

Chassis: machined in Pennsylvania from solid aluminum billet; bottom panel supporting the circuit board is solid brass

THD+N: 0.09%
Gain:  10dB
Frequency response: flat within 1.5 dB from 6Hz to 108 kHz
S/N ratio: 98dB (90dB referenced to a 1V output)
Input impedance: 34,000Ω
Output impedance: Below 80Ω
Crosstalk: 78dB
Power consumption, idle: 31W
Dimensions: 17 x 14 x 5 inches
Weight:  29 lbs