Not a surprise. Rotel is an electronics company that sells big, chunky amps with big transformers and big heatsinks. Rega is a tonearm company that has a line of overpriced fashion amps in half-height enclosures that have no room for adequate transformers and heatsinks.

You can’t skimp on current delivery and thermals and expect a class AB amp to do well… not at higher volumes anyway. I’m sure the Regas sound great in quiet, treated showrooms at short distances.