Randy,

Yes, I did read your previous post.

When they claim 300W into 4 Ohms, I interpret that as RMS and not peak. And how reflective is their environment? Also, I would expect an audio amplifier company to test amplifier power levels by using a sound meter. They need to connect a "high-quality" power meter into the circuit to establish the output levels.

I still suggest that you approach them about the waveform limiter, and, as I posted before, ask for documented test plans, test specifications and test results.