IMPORTANT NOTICE TO NX-AMPLIFIER BUILDERS EXPERIENCING:- 1. OFFSET ADJUSTMENT AND/OR 2. SECOND STAGE BIAS CURRENT PROBLEMs 3. INITIAL SETTING OF R6 – ERRATA IN SET-UP PROCEDURE 4. IMROVEMENTS TO THE PSU +PROTECT MODULE Please read this update:- Updates and…
The Ovation sx-Amplifier is a low component count current feedback topology (CFA) design that delivers the first 15W class A into an 8 Ohm load and about 25W in class AB mode. The design uses readily available components, achieves very…
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…
Here is the result of my investigation in to a high performance, low distortion line pre-amp, the ‘Ovation’ Stereo Control Amplifier One’. I drew some inspiration for this project after reading about the TEAC Esoteric line preamp, which is also based…
The Ovation 250: A 250W per Channel Audio Power Amplifer (updated 1st June 2013) Introduction Diy Audio is a wonderful activity:- if you cannot afford a $10 000 power amp, you can always build one that comes pretty damn close in…
There are many explanations about IC CFA topologies like this or this. Some plunge into math, loop gain equations and so forth, leaving the reader none the wiser, while this one (equations 1~4 and associated gain plots) from Hans Palouda…
