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Ovation e-Amp Modules

Ovation e-Amp: A 180 Watt Class AB VFA Featuring Ultra Low Distortion

February 2, 2014 · by Bonsai · in Power Amplifiers

The e-Amp is a 180 Watt RMS (very conservatively rated into 8 Ω ) fully balanced symmetrical (‘FBS’) amplifier featuring an emitter follower triple (EFT) bipolar output stage and beta enhanced VAS stage. The amplifier can be configured using jumpers…

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…

Some Ideas on Temperature Compensation for Audio Amplifier EF Triples

Some Ideas on Temperature Compensation for Audio Amplifier EF Triples

October 27, 2013 · by Bonsai · in Audio Design Library

Temperature compensating an EF3 audio power amplifier output stage is not a trifling task.  There are 6 Vbe junctions, running at 3 different current densities, different temperatures and neither is the thermal performance of the heatsink assembly characterized In most…

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