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-   -   Gain Block One Low Noise Preamp (https://www.diyaudio.com/forums/holton-precision-audio/339333-gain-block-low-noise-preamp.html)

The Saint 19th June 2019 06:27 AM

Gain Block One Low Noise Preamp
 
This is a Class A 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 -122dB and THD of 0.0006% and biased into full Single Ended Class A output, with input and output couple using high quailty film capacitors.
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.
The power supply for the Holton Gain Block One is a fully electronic balanced supply with 3 levels of PI DC filtering before the main regulators, ensuring a low noise smoothed DC supply feeding the electronic regulators supplying the main Class A preamplifier.

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

17.6dB - 7.6 Gain -122dB SNR
12.6dB - 4.2 Gain -122dB SNR
8.9dB - 2.8 Gain -122dB SNR
6.0dB - 2.0 Gain -122dB SNR

Frequency response 2hz to 500khz -3dB

THD+N 0.0006% (-106dB)

https://scontent.fmel8-1.fna.fbcdn.n...05&oe=5DC07A07


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