Where to mount a amp?
 

I have a 2000 Expy. Going to be getting a subwofer for the back and am wanting to put eitehr a 5 ch amp running to front/rear and sub or get 2 amps 1 for the front/rear and then one just for sub. Need some sugestions as to where to mount them to keep them out of view but still get ventalation for cooling.