Easy Semi-DIY 22 Watt Power Amp in a tiny box

Chris Hurley

Power User
Texas Instruments makes a prebuilt evaluation module for their TPA3001D1 Class-D amplifier chip:

http://focus.ti.com/docs/toolsw/folders/print/tpa3001d1evm.html

I've tried it and it works pretty well if you're using a guitar cab rig.

As I've mentioned when discussing the Electro-Harmonix 22 Caliber (based on the same chip), this isn't crushingly loud, but it is surprisingly loud when you see how small it is.

Once you take the $50 eval module, pay a little shipping, buy an enclosure, a few jacks, and a power supply, the EH is probably the same price, but I put a finished amp together with these parts for fun anyway.

I thought someone else might be interested in a semi-DIY backup amp that can fit in or on their guitar cab.
 
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