A basic problem is that most types of fans move a greater volume of air when
working against a backpressure than they do when working against a
backvacuum.
When working against a significant backpressure, a squirrel-cage type blower
will usually move a lot more air than an equivalent muffin fan type blower.
-- Tom, N5EG
> Could you wise old sages help me with simple question - I seem to recall
> hearing that forced air cooling was not the same as, shall we say, sucked
> air cooling. Do I remember right? Seems you could destroy your amp if
you
> tried to suck the air through the tube(s) tops as opposed to pushing it
> through from the bottoms.
>
> Advice please. Thanks in advance.
>
> Mark, N5OT
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