high power tube amps vs ss

Since I have set up my system to be absent of loudness cues, it frees me to set the volume to the level that seems appropriate for what I am listening to. A solo guitar being quieter than a full orchestra for example.

For example, do the harmonic loudness artifacts you describe commonly fall into the frequency ranges depicted that ears are most sensitive to?

The answer to this question is usually 'yes'. The reason is that the amplifier has to work harder to reproduce the lower frequencies. Their harmonics will often show up in the 'birdsong' region.

I can provide a simple test that shows how important this odd ordered thing really is. It can be done with simple equipment and is quantifiable. I've offered it before. If anyone here is interested, just say so.

Thanks Jake. I think the impedance/phased angle plots are demanding as reported in Stereophile mainly because of the 2 ohm dip and 4-5 ohm range. But other than that, the impedance is quite flat between 4 and 5 ohms across the freq. band. The low bass peaks are typical. Nevertheless, it does demonstrate the VS-115's impressive performance capability. How many amps out there can push power into such low impedance loads??

Atmasphere, I am interested to see what you have. If you can't pull up my email you'll get a personal response from mine in a few days.