Introduction

This is easy and interesting project from ROG. I needed simple and very clean amp and there were two 386s lying around so I gave it a shot. Also, having only 15×8 holes perfboard in part box I had to squeeze it as much as possible. It drives my 12″ Celestion Greenback very well, also loud enough for bedroom practice. I tried it with two 4″ 5W speakers salvaged from old Genius desktop speaker set but it sounds terrible, fizzy distorted sound all the time. I needed only clean amp so nothing is connected between pins 1 and 8 (gain control) of 386s for cleanest sound possible. There aren’t any pots or switches, volume and tone are controlled only with guitar pots. There’s no need for them because it will mostly be used as power amp only together with my Tube Reactor preamp.

Pictorial

Click on a photo to see more details

Update: I’ve heard that those 386D ICs can get warm so I placed heat sink salvaged from an old graphic card.

Update: Since I really like this amp I tried to further improve it by shielding enclosure. I got a decent sized self adhesive copper tape for my guitar project, so lot’s of it left over for other projects like this. It is clean amp, so there isn’t noise anyway, but it might help if used with hi-gain pedal. And I also got rid of that silly tape holding that matte plastic

Useful links

RunOffGroove.com project article