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What goes bad on a passive Radiator...


SilverSport

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...I have Klipsch Quartets (smaller brother to the Forte' IIs/Chorus IIs) and am wondering when the rear mounted passive radiator goes...what goes bad on it???...does it require any maintenance ever???...with Heresys...new crossovers and good care might be the only thing required to keep them running indefinitely but what of the Quart/Forte/Chorus family???

Bill

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  • 10 months later...

The passive radiator on one of my
KG-3.2s has kind of a buzz to it sometimes and when you lightly push in
on it it has a rough feel. The other has no buzz and feels smooth. Any
ideas whats wrong?

You sure you're pushing on the
passive radiator? What you describe is very common when you've got a
mis-aligned voice coil, but passive radiators don't have voice coils...

One
thing you might consider doing is rotating your speaker 180 degrees.
Over very long periods of time, you're going to get sagging in the
surround and spiders. Rotating the speaker starts the sag in the
opposite direction.

I
bring this up because I've had speakers sag
to the point of allowing the voice coil to rub. Rotating the speaker
was a 2 minute fix for alleviating the problem (for another dozen years
until it sags too far again). The same logic applies to passive
radiators though...the sag can cause it to rock sideways instead of
moving in and out like a perfect piston - ultimately this results in
distortion (and not the good kind either).

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