An Accurate Inverse RIAA Network
Designing and engineering RIAA equalizers demands a clear understanding of the signal chain requirements during the development process. Once components have been committed to a prototype PCB however, testing is required. Presented here is a simple Inverse RIAA Network, or…
Ovation Symphony Line Preamplifier
This is my latest preamplifer design, the Ovation Symphony, featuring Baxandall tone controls, up to 7 inputs and a class A 2 W headphone amplifier and a Goldpoint 24 position attenuator. The write-up describes the design process and choices in…
Ovation nx-Amplifier: A 100 W class AB Current Feedback Amplifier
This power amp design is based on the sx-Amplifier topology, but with the TIS and output stage re-configured for class AB operation, enabling it to deliver 100 W into 8 Ohms. I have kept the design very simple, retaining the…
Ovation sx-Amplifier: A 15 W RMS class A Current Feedback Amplifier
Update November 2015. For the sx-Amplifier, you can now buy a complete set of very high quality Double Sided THP Gold Flashed PCB’s from Jim’s Audio here: sx-Amplifier DSTHP Gold Flashed PCB Set The Ovation sx-Amplifier is a low component…
Ovation e-Amp: A 180 Watt Class AB VFA Featuring Ultra Low Distortion
The e-Amp is a 180 Watt RMS (very conservatively rated into 8 Ω ) fully balanced symmetrical (‘FBS’) amplifier featuring an emitter follower triple (EFT) bipolar output stage and beta enhanced VAS stage. The amplifier can be configured using jumpers…
