Assembled Hifisonix Products
in Assembled Products

X-Altra MC/MM Phono EQ Amplifier – £589-00 Price includes VAT for UK customer; excludes shipping. Excludes import duties and taxes where applicable for deliveries outside the UK. Kindly allow 4 weeks for delivery. Email me at bonsai(at)hifisonix.com if you want to purchase an X-Altra MC/MM Phono Preamp. Hifisonix ax-Amplifier: 60 Watt per Channel class A […]
Restoring a 57 Year old Receiver: The Pioneer SX-1000TA from 1966
in Uncategorised

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 hifisonix.com – it regularly tops the monthly hits table. I […]
My Beautiful Michell Gyrodec SE
in Vinyl preamps
I bought my turntable in 2016, having read about Michell turntables on and off for more than 20 years. While working in Taiwan between 2011 and 2015, I visited a local Audio shop in Tianmu, Taipei where a full Gyrodec within its Perspex case was on display. It was a huge piece of machinery, but […]
The ax-Amp: a 60W RMS class A Current Feedback Amplifier
in Power amplifiers
Click this link to order 2 off ax- Amplifier PCB’s https://hifisonix.com/shop/2-off-ax-amplifier-module-pcb/ Part 2 of the ax-Amplifier was published in audioXpress, 15th April, covering the power supply, power control, mechanical assembly and wiring, followed by detailed measurements. Here is a short synopsis provided from the AX website:- Click on the link to visit audioXpress Part 1 […]
Using the QuantAsylum QA401 for accurate Audio Measurements
in Power amplifiers, Preamplifiers, Technical

The QA 401 from QuantAsylum (superseded by a newer, improved QA 402 and now the QA403) has emerged as a popular, comprehensive audio test instrument in the DIY audio fraternity and the go to instrument in many cases for commercial production testing in the audio industry. It combines a first rate DAC and ADC with […]
Building Quiet Audio Power Amplifiers Requires Best Wiring and Layout Practices
in Power amplifiers, Technical

There is a misconception that noise pickup is reduced by placing the input RCA connectors (and similarly XLR input connectors in a fully balanced system) on opposite sides of the amplifier rear panel and then running short wires to the amplifier modules. This arrangement is the worst of all worlds. The internal loop areas available […]