hifisonix

The APSU is designed to power stereo Class AB audio amplifiers of up to 200W per channel and stereo Class A amplifiers of up to 60W per channel.

This gallery features some of the work done by the Hifisonix DIY audio builders’ community.

This is the new hifisonix Ripple Eater PSU aka ‘REP’.

The nx2 produces >100W into 8 ohms and >200W into 4 Ohms both channels driven.

A considerable amount has been written about voltage feedback amplifiers (VFA) over the years, but comparatively little attention has been paid to current feedback (CFA) types.

I usually write about new designs, technical aspects of audio etc but on one previous occasion waxed lyrical about the JBL SA600, a vintage stereo amplifier from 1966 designed by Bart Locanthi, which has turned out to be one of the most popular pages on h…

I bought my Gyro SE (SE for ‘Spider Edition’) in 2016, having read about Michell turntables on and off for more than 20 years.

Parts 1 and 2 of the ax-Amplifier were published in the April and May 2024 issues of US based audioXpress magazine.

The original Soft Start + DC Blocker published on this website a few years ago required quite complex wiring encompassing both the mains supply to the transformer and wiring from the rectified and DC-smoothed secondary.

The X-Altra Mini II has been discontinued as a complete project.