100 watts Symasym5 Power Amplifier
― Symasym5, is a "cute" power amplifier, designed with quality but still low price in mind. This resulted in a ClassAB BJT amplifier, using only TO92 transistors for input and VAS, with a reasonable part count. The topology used is well known and consist of a single diffamp for input, plus a 2nd diffamp with current mirror for VAS. This is followed by normal darlington EF outputstage using modern high beta devices. The circuit uses large amounts of feedback over the whole audioband and an [...].
![100W Power Amplifier Circuit [PCB]](http://s2.bloggerscdn.com/media/t/6394855/6394855_s_1361531056.jpg)
![[Blue prints]*](http://s2.bloggerscdn.com/media/t/14079133/14079133_s_1369116721.jpg)
