Hi John,
Thanks. The graphs are back on my screen now. Maybe I'm having these problems with the site because I use Opera. The problems have appeared in the last month.
The big difference with my prior conclusions is the power level after +9dB. I had made the assumption (Wid doesn't like it when I assume
) that the waveform remains sinusoidal right up to maximum volume. That assumption has now been proven wrong. Therefore, the voltage and power levels in my chart after +9 should be discounted since the waveform is being clipped.
As for the slew rate, I have to admit that I don't know the technical term for what we witnessed but it looks like the picture below. I'm wondering if the issue is related to a leaky power supply cap on the positive rail. If this was appearing at lower volume levels, I'd have my Denon apart right now but I just don't see this issue as being a practical concern.
