As the title says, any suggestions? It's for my daughter's hairdressers/sunbed shop/nail bar. She has some recently bought little Wharfedale Diamond speakers, and has one in each of three rooms. So I suppose the amp will need switchable mono. Doesn't have to be a new amp.

I had bought her an old NAD "Power Envelope" amp for this purpose, and it was a nice thing. But she's pigged about with the bare speaker wires in the back and now the amp gets "very hot and smells like burning" (her words). I told her to unplug it and wait to hear back from me...