Simple Ripple Eater PSU for the sx and kx-Amplifiers
A high quality double sided through hole posted and silk screened PCB for $10.99 (excl. shipping) is available for this power supply from Jim’s Audio here: Ripple Eater PSU for kx and sx Amplifiers Here is an Excel file with…
Hifisonix kx-Amplifier
The Hifisonix kx-Amplifier is a 28 Watt class A DIY power amplifier featuring low distortion, wide bandwidth and fast rise/fall times. It can be operated either in pure class A mode, or in class AAB mode with a lower output…
Very Simple, Accurate RIAA Phono EQ Amp
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…
Amplifier History: The JBL SA-600
The JBL SA-600 amplifier was launched by the James B. Lansing company in 1966, and this article was published in January 1967. I’ve included this in the hifisonix power amplifier library because it is one of the earliest – if…
An Accurate Inverse RIAA Network
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…
Last Tweets