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X-Altra RIAA Phono EQ Preamp

X-Altra RIAA Phono EQ Preamp

February 17, 2020 · by Bonsai · in Pre Amplifiers

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?

So Just How Quiet is Your Phono Stage?

March 19, 2019 · by Bonsai · in Audio Design Library, Pre Amplifiers, Useful Audio Links

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…

Ground Loops

Ground Loops

July 15, 2018 · by Bonsai · in Amplifiers, Audio Design Library

Updated with new material 7th January 2019 This set of c. 50 slides is the culmination of my experience over a period of about 25 years building numerous power amplifiers and preamplifiers. I first started out in audio around 1975…

Simple Ripple Eater PSU for the sx and kx-Amplifiers

Simple Ripple Eater PSU for the sx and kx-Amplifiers

June 2, 2018 · by Bonsai · in Amplifiers, Power Amplifiers

  The latest  PCB’s are gold plated,  through hole plated and silk screened for just $11.99 (excl. shipping) and are available from Jim’s Audio here: Ripple Eater PSU for kx and sx Amplifiers Here is an Excel file with the…

kx-amplifier: A very high performance 28 Watt class A Current Feedback Amplifier

kx-amplifier: A very high performance 28 Watt class A Current Feedback Amplifier

March 16, 2018 · by Bonsai · in Amplifiers, Power Amplifiers

The Hifisonix kx-Amplifier is a 28 Watt class A DIY Current Feedback (CFA) 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…

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