20wpc. Will be a bit small from what you’re used to having, but good for a bedroom system. Most likely a darlington output stage, I worry about those when using 4Ω speakers, potential burnout? (Tell me if I’m wrong about that…)
I have an SX-780 in my living room, 50wpc, used with Cerwin Vega VS-120 speakers, a 4Ω 50w resistor inline to increase impedance to 8Ω. I use it while watching movies. AM/FM section is out of whack, but I hate radio so I don’t care. It’s good, “Shpongled” quite well in the living room during a fungus excursion. In retrospect, an integrated amp would have served my purpose better. I paid $75 for it, and I’m getting my buxworth. I’d go for it at $50.