Problem driving Martin Logan Ascent i's

I had a 400xi that drove my ML Ascent i very loud with no problem at all, certainly well above 95db, probably well over 100db (it's been a few years).
Not sure how the 300 compares to the 400xi.

If you do the math the Krell Asent match should produce quite high levels . There is a problem some where . A friend that used to sell ML said the panels need replacement every 10 years or so . How old are yours ?

I heard a 40 watt Golden Tube amp easily handle ML's sweetly. I think there may be some other problem.