Hardly any manufacturers put speaker selectors on amps with that much power output…not even way back when. The Rotel or the NAD C399 might be the ticket.
High end designers eschew speaker relays as a rule.
Integrated Amp Suggestions
Looking to buy a new integrated amp. Needs to have home theater bypass and also ability to connect 2 pairs of speakers A/B. Rotel Ra1592 Mkii and Musical Fidelity M6si 500 are on list so far. Suggestions