Axiom Home Page Forums General Discussion Technical Questions EP 500 popping and burnt smell, but still working

All of Axiom's subs have class D amps now, the EP400 and above have the DSP function.

You're right in that the DSP must have an ADC taking the analog input, performing the DSP functions on the signal, and then passing it to a DAC before amplification.

Normally I'd be a bit more hesitant about an additional AD to DA conversion. But at frequencies this low, it is virtually lossless.