Magtech Amplifier

Kiwi,
My room is cool as well, but the amp runs very hot when I"m playing music at fairly loud volumes. It sounds great, I'm just wondering why all the reviews/comments talk about how cool this runs, when in my case this is not occurring.

Hi Brrgrr. How hot is very hot? Have you measured the tempurature? Can you touch the top cover without getting burnt?

While I have not tried the Magnapan 3.7 in my own system, I have auditioned them twice in dealer systems. They are not an especially tough load and dealers were using amplifiers in the 100-200w range. No issue for a Stereo Magtech to drive the 3.7. I used the Magtech to drive some ESL speakers that presented impedance ranging from 1.5 ohm to 250 ohms. No issue at all for Magtech and I could touch the top cover.

Kiwi,
It's hot to the point that keeping your hand there for more that 10 seconds starts
to be painful.
This is when the speakers are being pushed, and I like the volume up .
I do know Mr Sanders told me that maggies are very power hungry, and take a
lot of watts when they are pushed loud.
Maybe it's time for the mono versions...
Just concerned that this may be shortening the life of the amp, given all the heat.
Maybe it's nothing to worry about...

Mine are warm and I play my hybrid stats pretty loud. They (I have a pair) get much warmer than at idle, but I cannot say they are hot.

It sounds like you may have a problem with high frequency (ultrasonic) instability. This may be caused by your speaker cables. Roger has a white paper about that on his web site and says that can cause the amp to run hot. I have to of his amps and they have never even gotten warm to the touch. I would recommend calling Roger and discussing it with him.