Thanks! So I understand that the DMM and scope show voltage differently, but can you give me a rough guideline with respect to determining whether the amp's measured output power is acceptable? I came up with 30W, you got 50W using the scope's p2p values. That's a pretty wide range with 30W being significantly lower than the expected 45W. How should I approach in the future? Yes, thank you very much. That was the end goal here. My friend the owner the other day wanted to know if he should go ahead and pick up some new speakers (they were to be replaced eventually anyhow). I can now direct him to do so with confidence that the amp itself is operating normally.