Using Martin Logan speakers with tube amps??Any experiences??

You might want to try the Bob Carver Raven 350 mono block amps. With 350 wpc and the ability to drive low impedance speakers they should work great!

ozzy

This, as with any Youtube video of somebody's rig, might not help much but I think it's sort of interesting since I own one of these amps: https://www.youtube.com/watch?v=jlR9B22kOiM

In. General, how many years lasts an electrostatic panel before it losses their optimal performance??

Depends how humid, if your a smoker, if it’s in a dusty environment, how often your prepared to vacuum them to get dust off them, and I forgot little mini flying bugs (moths) are bad news also (I vacuum them every 2nd time the house gets done)
I got around 20years out of a set of ESL panels before they start to decrease in the HT (ML’s 5kv) on the Mylar diaphragm. (I always turn them off when not listening, they take around 1/2hr to come up to full charge, which is fine as so does the rest of the systems electronics)

But their worth it, the only thing that comes in second was big Apogee’s and Magies with full length ribbons, everything else is also rans in my opinion. The only thing to better them all in the upper mids/highs is a Plasma tweeter, which I use from 10khz up on my ML’s
https://www.ebay.com.au/itm/Magnat-Plasma-MP-02-ion-tweeter-massless-air-plasma-speaker-Plasmahochtoner/272894087984?hash=item3f89c15330:g:V5sAAOSwCJxZ6PXy&frcectupt=true

It’s all about the mass of the diaphragm that has to be moved and respond without delay back an forth without any over/under excursions, especially in the upper mids and highs where it has to move back and forth much faster.

Cheers George