Gain Block One R2 Available Now!
New features include Single-ended RCA to Balanced XLR outputs,
Multiple power source capable, from Raw Single +5vdc to +30vdc, with onboard low noise regulators.

The Gain Block One is a Class AB gain selectable stereo preamplifier, four basic gain settings can be selected individually per channel, from a gain of 2, 3, 4.5 and 7.5, at very low noise and THD, SNR of -124dB and THD of 0.00052% 
Designed to be used between a RIAA Phono amp or used to boost the output of your high end DAC or any other application where extra Hi End gain is required in your sound system. With an added 10k Ohm dual gain potentiometer, you can have a high performance RCA to RCA or RCA to Balanced XLR output preamplifier.

The printed circuit board is made from high quality 1.6mm thick FR4 material with a 1 ounce copper foil, Gold Immersion Plated.

Signal to Noise Ratio at the following switchable output gain levels.