Product parameters:
Working status: Class A and B.
Output power: 100W+100W (*V=±35v)
Working voltage: DC Dual 20V to dual 35V.
Distortion: THD is 0.002% into 1 kilohertz and full power .THD is 0.005% into 10 kilohertz and full power.
Input interface: dual channel signal input.
Output interface: dual-channel speaker output.
Power supply mode: dual power supply working mode.
PCB specification: 180X69X1.6mm.
Specifications of main parts of circuit board:
1.High-power tube: MJL4302/4281 pairs of 4 outputs.
Drive tube: Toshiba famous tube
2SC4793/2SA1837, thermocouple is ST BD139.
2.The small signal tube is ON MPSA18 2N5551, 2N5401, For Philips BC556/BC546, and MPSA18 can be replaced by Toshiba 2SK170.
3.Coupling capacitor Non polar film capacitor.
Audio Amplifier Symasym5-3 is a very well-known circuit on the foreign diyaudio forum. The number of clicks on this circuit post is still very active. Its sound quality can be said to be very good. The 200W power is very suitable for home use. Its circuit works in Class A and B. Electricity, low heat generation, I helped a friend install a finished machine, and he often didn’t shut it down for several days during use, and the performance was stable. The circuit board adopts a mirror image design, one point of grounding, no current sound of ground loop, it can be formed into a high-quality power amplifier.
