chattaudio
I had some I built that were based on the Wavac 805’s even better than the Cary with my ML’s. Even if bi-amp’d and just driving the ML’s esl panels with the 805’s, you’ll get a severe roll off in the highs. All ML esl panels go down below 1ohm!! in the HF, and have nasty -60 degree phase angle and 3ohms at 4.5khz, and tubes just don’t cope with it and act like a tone control.
Stereophile on the Montis
A figure of 0.55 ohm at 20kHz. Either way, that this speaker is a difficult load for the partnering amplifier to drive is compounded by the high electrical phase angle
https://www.stereophile.com/images/912Montisfig1.jpg
Put a good high current high biased Class-A/B on the Montis like a used Parasound Halo A21 or new A21+ if you have the money. You could if you want to be tight with money, even try a used Halo A23 on the panels.
https://parasound.com/a21.php
https://parasound.com/a21+.php
https://parasound.com/a23.php
Cheers George