I found something interesting reading the documentation!!Yet you couldn't trouble shoot an amp running hot?
.....
Due to the high power output of the PDX-V9, considerable heat
is produced when the amplifier is in operation. For this reason,
the amplifier should be mounted in a location which will allow
for free circulation of air, such as inside the trunk. For alternate
installation locations, please contact your authorized Alpine
dealer.
.....
Looks like I'm gonna have to prop the lid open for normal operation, maybe a cooling fan too!
John Kuthe...
John Kuthe..