Oneobgyn,
I have had a similar experience as Cytocycle with the DarTZeel amp myself. (However, not with the Maxx II's, as I have no experience with them, other than hearing them breifly at a dealers.)
My friend uses the Lamm M2.2s, (the 220 wpc successcor to the 200 wpc M2.1s, that I use). He used to use Avalon Eidolons, and when he upgraded to the Rockport Antares, (a more efficient speaker), he decided to test out the DarTZeel amp, as a local seller of one happened to pop up on Audiogon. We listened to both, and while the DarTZeel is an excellent amp (my favorite solid state amp, btw), it did indeed run out of gas trying to get the last bit of bass response out of the Rockports. We both preferred the Lamms to the DarTZeel, mostly due to the bass response, (We liked the treble of the Lamms better too, but I almost think that was more of a preference, rather than one being clearly better than the other.)
My two cents worth.
I have had a similar experience as Cytocycle with the DarTZeel amp myself. (However, not with the Maxx II's, as I have no experience with them, other than hearing them breifly at a dealers.)
My friend uses the Lamm M2.2s, (the 220 wpc successcor to the 200 wpc M2.1s, that I use). He used to use Avalon Eidolons, and when he upgraded to the Rockport Antares, (a more efficient speaker), he decided to test out the DarTZeel amp, as a local seller of one happened to pop up on Audiogon. We listened to both, and while the DarTZeel is an excellent amp (my favorite solid state amp, btw), it did indeed run out of gas trying to get the last bit of bass response out of the Rockports. We both preferred the Lamms to the DarTZeel, mostly due to the bass response, (We liked the treble of the Lamms better too, but I almost think that was more of a preference, rather than one being clearly better than the other.)
My two cents worth.