Sorry to bump a relatively old thread but I've been reading casually through it to garner a few ideas regarding cabinet cooling.
I've just today added a couple of silent 120MM fans to the rear of my cabinet, which is closed at the sides and mostly at the back (apart from some cable holes).
The cabinet has two shelves with my AV amp and Meridian power amp sitting together on the bottom shelf.
Prior to adding the fans there was a lot of hot air gathering in the bottom half around the amps and the top of the Onkyo was hot to the touch.
Now that I've added the fans, the amp casings are much, much cooler to the touch and the general 'atmosphere' in this little area is much cooler. This leads me to believe the fans are doing a good job of pulling in cool outside air through the front of the cabinet over the equipment.
However.. the onboard temp readout of my Onkyo 705 (using the 'hidden' temp menu) seems to read a couple of degrees (Celsius) higher with the fans on when "idling".
This is weird and doesn't tie in with the lower "ambient" and casing temps!
Should I ignore the onboard reading and consider the lower temperatures a good thing?
Thanks Edited by Howard-Canning - 1/26/14 at 11:00am