X-Altra RIAA Phono EQ Preamp
The X-Altra MC/MM RIAA Phono EQ article Part 1 and Part 2 have been published in the February and March issues of audioXpress magazine. Here is a link to the February issue overview and towards the bottom, a quick intro…
So Just How Quiet is Your Phono Stage?
You may be in for a surprise: actually not that quiet! The reason of course is that the cartridge inductance and resistance dominate the noise in any decent phono amp. To get the best in terms of noise performance, you…
Very Simple, Accurate RIAA Phono EQ Amp
Very High Quality Silk Screened PCB’s for this project are available from Jim’s Audio here:- Hifisonix RIAA Amplifier Here is a simple no-nonsense, accurate RIAA equalizer amp you can easily build. The design uses an all-active topology and is based…
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…
Ovation Symphony Line Preamplifier
I designed and built this preamplifier while living in Taiwan a few years ago. The ‘Ovation Symphony’ features Baxandall tone controls, up to 7 inputs, a class A 2 W headphone amplifier and a Goldpoint 24 position attenuator. The write-up…
