Post by underthebottom on Aug 31, 2015 16:40:05 GMT -7
All of my power amps are mounted in the basement below my theater. None of them came with fans installed. Some have 12VDC triggers, I wired power relays inside the outlet boxes for the others. All are controlled from "X marks the spot".
A fan was an option for the ancient Dynaco 400s that I use for the surround speakers. I bought some used fans from a surplus catalog, and picked one that seemed quiet. I unzipped some 18AWG lamp cord to make 2 loops through 4 of the 8 mounting holes, and hung the fan from a wood bracket to isolate any vibration. The two amplifiers are side by side, so the fan blows through the vertical heat sink fins of both, in the same path as the factory design, but not touching.
The amps for the front channels and subs all sit side by side on surplus wire refrigerator shelves hung from the floor joists close above. All have perforated tops and bottoms for convective cooling of internal heatsinks. Two of the surplus fans came with a bakelite "funnel" mount. I hung those fans between the floor joists so the pair blows through the space between the joists and over the amps. Heat rises unimpeded and gets carried away on a gentle breeze.
I wired variable speed controls to the fans, it feels like enough airflow even with them turned down as far as they go. Removing the power amps and fans from the theater helps to declutter the room. It also simplified running the power wiring, by using a secondary breaker box for the A/V and computer equipment. All 7 branches are short runs of 12AWG feeding 20A hospital grade outlets. Could that be considered an oversized power strip?