I have heard conflicting recommendations on using the power conditioner to supply power to power amplifiers or powered speakers. How many people just plug into the conditioner or straight into the outlets?
I think that plugging directly into a wall outlet is just asking for a damaging surge to happen Moreover, if you have dirty power, its not going to help things either. As long as your power amps aren't drawing that much current (most new amps are much more efficient), I don't see why a power conditioner (or two) wouldn't work just fine.
Before I started using a power conditioner, I used a simple surge protector for just the amplifier and plugged it into its own outlet. They even have some conditioners with reserve power which actually increases the available power on the line for peak transients over bare wall outlets.