Backert Labs Rhythm 1.1 preamp, Pos. Feedback winner

The Rhythm 1.1 single-ended line stage preamp, by Backert Labs. Winner, Positive Feedback Writer's Choice Award, 2014. Uses two 12au7 tubes. Bob Backert has been designing and modifying amplifiers for decades. Bob and his son Gary build each Rhythm 1.1 by hand in Pennsylvania. The Rhythm 1.1 is voiced to provide the best possible rhythm and dynamics. In our view, these factors are critical for creating "live" sound. The overall design of the Rhythm 1.1 is a new approach:

- It has a handy tube access door that lets you change tubes with the touch of a finger, no tools needed.

- Its modern anodized exterior has no visible screws or ventilation slats. - It's the only preamp with bias correction. Incorrect bias can affect sound quality. As a result of our automatic correction, every tube you try will be perfectly biased and will sound its very best in the Rhythm 1.1.

- It's the only product able to use V-Cap capacitors to run the power supply. We received a US patent on this design in 2013. Having this very nimble and linear type of capacitor in the power supply contributes to the Rhythm 1.1's accurate rhythm and dynamics.

A solid metal remote adjusts volume. Comes with balance control, mono switch, mute switch and Record Out RCA jacks. Five inputs, two sets of outputs. The Rhythm 1.1 comes in silver or matte black.

We will pay shipping, and there is no extra charge for using Paypal. US and Canada buyers only, others please contact us through our website.

Specifications:
THD+N: 0.032%
Gain: 24.5dB or optionally 9 dB
Frequence response: Low end: flat from 1.5Hz up. High end: -1dB down at 400kHz, -3dB down (the industry standard point for measurement) at 810kHz.
High end frequency response for the lower-gain version is -3dB down at 320kHz.
S/N ratio: 98dB (90dB referenced to a 1V output).
Input impedance: 55,000Ω
Output impedance: 150Ω
Crosstalk: 78dB
Power consumption, idle: 23W
Power consumption, maximum output: 24W