Dang you guys lol. Just when I thought my amp rack was all finished up and ready to go into the truck I gotta read all this talk about fans. Well guess I need to put in another order and put even more stuff on the amp rack now lol.
I know the heat sink is going to do the majority of the cooling, but would the amp benefit from removing the bottom cover and aiming a fan towards the inside? or maybe machining a grill into the bottom cover and mounting a fan inside? I can't really get a fan to blow around the heat sink but I can pretty easily get something along the bottom of the amp. OH, and the amps are a Sax100.4 and a Saz1500D
Here is a pick of my amp rack, the fan in the middle is for cooling the computer that is mounted in there, and this is all going behind the seat of my truck so probably not too much air flow.
Oh and to the OP if you haven't picked up your amps yet I would vote to go and get em. Will be nice to get all your stuff installed and just wait to drop the subs in and go. Plus will give you some extra time to deal with detours and install issues you might skip over if you were rushed to install everything to hear it play right away.
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2005 Ford F350 crew cab long bed, 6.0L diesel, 4x4
HU: 10.4" touch screen computer linked to Alpine 9887
Front Stage: Polk Audio SR6500 Active
Front Amp: Sundown 100x4
Sub: Stereo Integrity Magnum 12" V4
Sub Amp: Sundown 1500d