300W Subwoofer Power Amplifier

There are some important updates to this project, as shown below. Recent testing has shown that with the new ON Semi transistors it is possible to obtain a lot more power than previously. The original design was very conservative, and was initially intended to use 2SA1492 and 2SC3856 transistors (rated at 130W) - with 200W (or 230W) devices, some of the original comments and warnings have been amended to suit.




Download this schematic diagram.





Datasheet semiconductor component. (PDF Format)

1. MPSA42
2. MJE15032
3. MJE15033
4. MJL4302A
5. MJL4281A
6. IN4004