Not exactly the most powerful amp section in that receiver, but many units of that era were of modest power output. If you're going to get an amp I'd get a truly powerful amp, at least 200 wpc and one more capable of lower impedance loads like 2 or 4 ohm so you can use pretty much any speaker with it. I'd probably do that in the form of a power amp, and get a separate pre-amp to work with it, rather than try to find such in a receiver or integrated amp.