2001 Acura CL Poor Idling/ May be related to new car stereo

I recently had a 500W amp professionally installed in my car, and after driving for a day or so, i began to notice my car was acting strange, and this only happens if the car is warmed up.

If I come to a stop, the idle will be fairly low, in the 800 rpm range and will waiver. This is the strange part. If I turn off the A/C when I am stopped, the RPM's will drop significantly, and lead to the car stalling a majority of the time. If the engine is about to stall, and i turn the A/C back on, the RPM's will recover, but will still idle poorly.

I disconnected the car amplifier, and tried to recreate these events. I noticed that the RPMs will drop minorly, say 100-200 rpm when I turn off the A/C at a stop, but the drop will never make the car stall.

Is this a mechanical/sensor issue (IE TPS), or is this an electrical issue?

I read a similar post that suggested that my stereo was overpowering my charging circuit, and that I should get a more powerful battery and alternator.

I had my charging circuit checked at autozone, and they verified that my battery and alternator are functioning properly.

Thank you for your time.