Just out of curiosity, what is the operating temperature of the magnets in the BTL N2. I'm sure Fi researched this, but I was just curious. From what I can gather, the operating temperature for ferrite magnets is around 300*C, but the operating temperatures for neodymium magnets is quite lower (source). What grade exactly is the magnets used in the N2? As in, is there a letter following the "N48"? I don't know exactly how hot the magnets get, but I read that voice coils can exceed 150*C. Thanks!

Which is why that biiiiiiiiiiiiiiiiig hunk of aluminum surrounds the coil and not the magnet material itself

The heatsinks are monstrous on the N2. When mine was inverted I ran it hard for about 30 minutes, felt the motor/heatsinks and expected it to warm my hands... it was cold. It was about 45 degrees out, but I was bumpin hard at idle with the car nice and toasty

Since then I flipped the sub around, so I can't tell how warm it got, but I did some pause burps and 30 sec music runs at 3200 watts off a SAZ-3500 with no issues. I'm going to run around 3k for NESPL, don't foresee any problems... I'm sure I could run 4k+, but I'm saving that for my world record run for stock class with a N3 woofer

but what exactly does ""maximum operating temperature" even mean? The magnet doesn't lose magnetism until like 500+ degrees, that is really the important number right? The magnets could never get to 500 degrees. Is that the curie temp?

The heatsinks are monstrous on the N2. When mine was inverted I ran it hard for about 30 minutes, felt the motor/heatsinks and expected it to warm my hands... it was cold. It was about 45 degrees out, but I was bumpin hard at idle with the car nice and toasty

Since then I flipped the sub around, so I can't tell how warm it got, but I did some pause burps and 30 sec music runs at 3200 watts off a SAZ-3500 with no issues. I'm going to run around 3k for NESPL, don't foresee any problems... I'm sure I could run 4k+, but I'm saving that for my world record run for stock class with a N3 woofer

Yeah Fi realy did there homework on there new btl line up.