In the next few weeks, the new Hifisonix class A amplifier, the kx-Amp, will be completed and the write-up and PCB Gerbers (DSTHP) made available for DIY’ers. A commercial version, loosely based o the kx-amplifier design but with some added…
Here is a simple no-nonsense RIAA amp you can easily build. The design uses an all-active topology and is based around an NE5534A low noise opamp. I make no claims for originality but you wont find any voodoo engineering, fairy…
The diagram above summarizes the interaction of the cutting head response (purple) and the playback EQ (red) which produces the final flat response (green). Note that the cutting head and the phono pickup (cartridge) are velocity transducers and therefore the…
“Why, sometimes I’ve believed as many as six impossible things before breakfast.” ― Lewis Carroll, Alice in Wonderland A Future Without Feedback by Martin Colloms There is no mysticism in amplifier design, just serious science. —Andrey A. Danilov Introduction…
This set of slides is the culmination of my experience over a period of about 25 years building numerous power amplifiers and preamplifiers. When I first started out in audio about 40 years ago as a teenager, some of my…
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