Please pass this info to Alpha 9500 owners.........
1. Mine may be unique, but the foam piece between the mount for the blower and
the bottom chassis may be deformed or become deformed which will throw the axis
of the squirrel cage and reduce air flow. Really deformed foam will allow the
axel to go so far off alignment that the cage will strike the housing and make
a noise. The foam is deformed by the shipping hold-down screw--the one to
remove during first installation--and in my case, the foam did not expand upon
release of the screw. After a few hours of usage, the cage began to hit the
housing, requiring replacement.
2. The Alpha 9500 advertising description led me to believe that the amp had
over-drive automatic shut down protection. That is, if it is driven with more
than about 100 watts, the amp will protect itself automatically. Yes, it does
that, but the way it functions is to cause a one watt resistor to blow that is
mounted on the rear circuit board. That resistor is a tiny SMD which will be
beyond most old hands to repair. Thus, the "protection" against accidental
over drive is a resistor working as a fuse located in a very difficult place to
replace. The caution to owners of this amp is NEVER to overdrive it, accident
or otherwise, because the repair is not easy nor quick; the resistor is not a
fuse that one can just pop in. I was fooled by the advertising description and
was not super careful.
3. There is a small light on that board that blinks red. It is supposed to do
that.
I now fear what other unknown tricks and flaws await me using this very
expensive amp. 73,
Charles Harpole
k4vud@hotmail.com
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