I recently acquired two inoperative THP HL-1.5Kfx amps. One is fully repaired and the other in process.

Question: Should cooling air exit the top of the amp or enter there and exit the back. Unbelievably, one of the amps is one way and the other is backward....... but I am not sure which is correct. Normally it is more efficient to push cool air through than pull hot air out.

Anyone? What does yours do?

Warren Allgyer