You may want to have someone check the amp. I have had a 2600A since 1987. Over the years it's driven some REAL tough loads. I'm talking Acoustat and Apogee, which have much more demanding impedances than the Maggies. I've also driven some tough dynamic speakers with them such as Thiels and Dynaudio(theirs and kits). I have NEVER had a problem with running out of steam. This amp has thoroughly outclassed some more "upscale" amps I've had over the years in the ability to drive these loads(but not in overall sound). I've have never had the amp go into thermal protection at all. Also, no other problems. You should have NO difficulty with the Maggies, as I believe they are a very stable, flat(compared to most speakers) 4 ohm load. Your amp SHOULD drive a continuous 2 ohm load. So, look into it.
Amp overload,! NAD 2600 & maggies 3.5
I got a pair of magnapan 3.5's two months ago and paired it up with the NAD 2600 power envelope amp (150 watts) and a NAD pre-amp series 20, I cannot put the voloume above 4.5 without the amp overloading. Any suggestions? Having the song crap-out every 10 seconds kind of ruins the mood.