This one was a bit tricky! First the guy who build the stone wall ended up with a 1 1/2 tapered front to back
And then i had to ventilate the sound system area because of the two amps! Ok easy work, first beat the mason! Then, build a two fan down draft with heat sensor in the back of cabinet and exhaust from the toe kick! Works perfect !
Got the kit of fans and sensor at a store called Addison electronics.
It actually works really well and keeps the system cool.
I install this on every units that contains sound system and mostly with the plasma that are inserted in a cab! The kit of fans and electronics runs about $35.00cdn.