I have a blown up Fosgate amp. The faceplate has been ripped off &
the model isn't anywhere on it, the best I can tell from images is it
is a Punch 401s. All four switching fets in the power supply circuit
are blown into oblivion. The only marking on one of them I can make
out is NTP45N (the rest of the number is missing). Any idea what fets
they use in the power supply side of these amps?

Also, what is the best way to go about removing & installing
transistors on those MESHA mounting brackets like shown in the
following link:
http://www.soundbuggy.com/Eric/Car%2...x/DSC06696.JPG
Big soldering iron? Micro torch?

Thanks for any help,
Steve