I’ve used Rotel Class D amps for years and years. They use B &O iCE modules. I have five modules, from five channel 250/500 watt models to extremely powerful 500/1000 watts modules. They are beautiful sounding amps. Love em so much, I’ve built my own 1000 watt sub amps using these modules. I’ve also built amps using Pascal modules up to 2500 watts. Very expensive, but incredible sound.