Amp racks in trunk

[subzero 5,000+ posts]

Just remember that if your amplifier(s) is designed to cool by convection, having the fins run vertical yields the best cooling results.

I have cooling fans that blow air along the lenght of the fins.

 

[audioholic 5,000+ posts]

I have cooling fans that blow air along the lenght of the fins.

With external fans, the mounting direction doesn't really matter (except upside down, still a bad idea). My comment was a general statement, not directed at you or your install specifically.

 

[subzero 5,000+ posts]

I know. just saying, to give the op some information to help him decide.