Chapter 18A low-noise preamplifier with variable-frequency tone controls
(Linear Audio, Volume 5, April 2013)
One day in 2012, I was on the diyAudio forum, and mentioned in passing that I had designed an improved version of the variable-frequency tone control used in the Precision Preamplifier ’96, with lower noise, lower distortion, and improved control laws. There was quite a clamour on for me to write it up properly and publish it. Jan Didden was enthusiastic for its publication in Linear Audio, so I set to work. Since a stand-alone tone-control is of limited utility, I added a line input, balance and volume control, and voila, the Linear Audio Low-Noise Preamplifier was born.
I didn’t have anything very new to say about phono inputs at the ...
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