HOT AMPS WHAT IS THE BEST WAY 2 COOLEM

I HAVE 5 AMPS IN 1 2 LEVEL ALUMINIUM BOX 2 1000 WATT SUB AMPS IN THE BOTTOM AND 3 MID/HIGHS ON THE TOP 2 300 JL WATT AUDIO AND 1 200 WATT.
THEY GO TO THERMAL PROTECTION WITHIN 45 MINS OF PLAYING. I DONT RELISH THE IDEA OF MOUNTING THEM ON THE SIDES OF THE BOAT WITH ALL THE WORK THAT INVOLVES , WILL A COUPLE OF FANS DO THE JOB OR SHOULD I JUST START GLASSING IN NEW AMP MOUNTING BOARDS