Simple SS mono amp?

[diaz028]

I am looking for the simplest design, wattage output anywhere between 150-250 Watts RMS.

I would like to study it and its components so I can understand the basics. I have successfully built a tube amp, working on my second one - and have a very decent knowledge on tube theory. However, I am considering an SS build for my powered home subwoofer.

My final goal is to eventually add different filters to the circuit, including a clip filter (protection), and an effective EQ system (maybe parametric) to adjust the frequencies between 10Hz and about 120Hz. Other filters would include an adjustable rumble filter (subsonic filter), a low pass filter adjustable from ~80-200Hz.

I would like to learn each part in sections / blocks so that I can design my own model for my own applications.

But for starters, I would like to understand the most basic AB mono power amp, including the essentials such as simple preamp and power supply.

Thank you!

[Tekko]

Its not the best circuit but it is about as simple as it gets: http://i.imgur.com/PNIwH.png

I've built this and its working and sounding nicely.

Note that you can use almost any driver and power transistors, like BD139/140 or MJE340/350 for drivers and anything from 2N3055 to big expensive bipolars for the outputs.