Had this amp for awhile now and well pleased with what it can accomplish, sound is
solid all the way.

However I've just recently finished my lower section of my mobile wheeled rig and
the amp along with a grapic and a composer sit in their own rack system, the issue
I should have noticed is the darn fan, got a nice bass reflex tube connecting the fan
to the out side world but the problem is its blowing the wrong way (sucking in from
the rear) and exhausts to the front through the front grill, not what I planned

Does anyone know if its ok to turn the fan about so it blows the other way around
Im all for this thing ''If they did it like so then dont mess with it'' but its gone and
screwed it all up, my main concern is internal cooling of the other components such
as the transformer as it situated near a exhaust grill.... I wonder

Any suggestions.

Cheers

Cooling is probably the next most important aspects of Amp design after the transistor configuration, since the more efficient the cooling the less likely the effects of transistor breakdown or intervention of the protection circuits. Nothing is worse on a Humid Summer night than the thermal protection kicking in on one channel, and wondering if the remaining channel is going to go the same way, leaving you with total silence .

Front to back cooling is very common, and seems to be the best. All of the Amps which I have use this method and i've never seen one trip due to thermal overload, and the New C-Mark Amps, have twin fans with front to back cooling and these run especially cool.

The idea behind this, is to have fresh cool air blowing over the metal heatsink and cooling the transistors before exhausting through the front panel. Fitted the other way, it'll be dragging stagnant, already partially heated air over the heatsink and the effect will not be efficient. Transformers rarely run above about 40 or 50c ambient and don't really require cooling, the transistors are the main concern.

My advice is to leave the design as it is. I once reviewed a DARE Amplifier (See reviews section) which had an internal fan design, and it ran hotter than I would have liked.