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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…

Ovation nx-Amplifier

Ovation nx-Amplifier: A High Performance 100 W class AB Current Feedback Amplifier

July 15, 2014 · by Bonsai · in Power Amplifiers

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…

CFA vs. VFA: A Short Primer For the Uninitiated

CFA vs. VFA: A Short Primer For the Uninitiated

November 22, 2013 · by Bonsai · in Audio Design Library

This article was written in 2014 in response to what can only be described as a vitriolic debate as to what constituted a CFA on diyAudio.com.  At the time, many of the participants were struggling to grasp the fundamental differences…

Audio Power Amplifier Design - Peter J Baxandall

Audio Power Amplifier Design – Peter J Baxandall

October 31, 2013 · by Bonsai · in Audio Design Library

In this 6 part series of articles published from January 1978 in the now defunct Wireless World magazine, Peter Baxandall takes the reader through some of the fundamentals of audio amplifier design as they were understood at the time.  …

CFA Diamond Buffer IPS: Does it Operate in Class B or class A?

October 23, 2013 · by Bonsai · in Power Amplifiers

There is a persistent assertion by small group of amplifier design practitioners that the diamond buffer input stage of CFA audio amplifier operates in class B (or AB) mode wherein there is a hard ‘handover’ between each half of the…

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