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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…

Fast Voltage Amplifier Stages for Audio Power Amplifiers

January 10, 2019 · by Bonsai · in Audio Design Library

Here is a quick look at some of the problems that can occur when the VAS (aka TIS) in an audio amplifier is driven into saturation without considering the effects of base charge storage – a phenomena all bipolar transistor…

RIAA Equalizer Amplifier Design

RIAA Equalizer Amplifier Design

July 22, 2018 · by Bonsai · in Audio Design Library

This article explores the intracacies of phono amplifier design,  culminating in a few practical designs. Special emphasis is placed on overload margins (critical if you want good sonics from your EQ amp), driving the EQ network adequately and noise. RIAA Equalization…

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…

MC Head Amp Circuit Compendium

MC Head Amp Circuit Compendium

June 17, 2018 · by Bonsai · in Audio Design Library

Here is the new updated moving coil head amp designs compendium – updated 31 July 2019. The first file is a PDF compendium of about 28 different circuits with noise, distortion and current consumption details. All the LTspice sim files…

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