Octave Integrated Amps

The V40SE will handle 100db speakers with no problem. My only concern would be the impedance dips below 4 ohms. The Octave will do 2 ohms but at that point you are pushing the integrated to the max.

As far as the volume taper, I find my Ei KT90 type 2 output tubes have the shallowest but at the same time are one of the more powerful tubes I have.

Thanks Xti16 and to everyone who chimed in.

impedance swings will change the spectral response using tubes.

More important (maybe) would be how complicated the crossover is and how the phase angles measure. Large phase angles and an impedance dip at the same frequency would be a non-starter for tubes. For me, at least. The lower the frequency the greater the offense, in general.

Getting phase data from a manufacturer is nearly impossible. Check some Stereophile speaker reviews to see what I'm getting at.

Thanks Magfan. I am rethinking the tube amp idea. If I do decide to go with tubes it will be Mac as I have 2 Mac shops close by and would be able to get maintenance without hassle.