I need a DC power supply for a project I'm working on. I have a Leach amplifier with a monster power supply and heat sinks able to handle it clipping at ~500W/channel. It's just sitting on my floor. I also have a 2 16bit 1MHz DACs and 2 16bit 200KHz ADCs attached to a National Instruments FPGA. I'm thinking instead of buying a DC power supply, I can write a program in 10 minutes that feeds a nice sine curve to the amplifier, and just buy a 2 rectifiers and some caps and build a pair of clean full wave rectifier for <$10 and hook it up to the outputs. Any immediate reason this is a bad idea? There's no way I'll need more than 2A @ 12V DC from this thing, and it's able to drive a 4ohm load to something like 60+V peak-to-peak, which means 10A @ ~40V DC after a rectifier. It's going to be the power source for a switch-mode duty-cycle controlled driver for a tiny servo motor (electronic throttle body from a car that I'm testing on my desk).