Schematics

You will find in this page (and the links) all the required amp schematics. Before proceeding, it should be clearly understood that this amp is not a simple construction for beginners. It requires advanced knowledge and equipment to fine tuning the ultimate performance. Following our construction details enables but does not guarantee the ultimate performance. Due to unavoidable parameter dispersion, some fine tuning will always be required. You may download an archive with all the required schematics in PNG format here.

The Error Correction Output Power Stage (EC OPS) is based on Bob Cordell’s design. The implementation allows for either lateral MOSFETs (our choide) vertical MOSFET or BJTs...

Several important functions are implemented under the generic "Auxiliary Circuitry" name. While these features are certainly adding complexity to the whole design, they cannot be avoided if we want a high performance reliable amplifier...

The front end design is centered around two concept: the Common Mode Current Loop (CMCL) and a modified version of prof. Cherry’s Nesting Differentiating Feedback Loops (NDFL)...

The roots of this design can be found in a sticky thread at www.diyaudio.com. At page 49, post 1207, a new symmetrical design was published, in an attempt to solve the known VAS bias instability that plagues...

The original plan was to build a classic raw supply. A 650W toroid was providing 2x39Veff @8.4Amps which were rectified by a 35A bridge. Smoothing was provided by two Mallory 50,000uF/60V caps...

Wiring the amp is no small job. It is critical that the wiring design follown some well established rules (no ground loops, star ground connections, separate signal and dirty ground connections...