Here is a wierd little tale re speakers I just solved. Like most B's,
my0 B's speakers are located in the doors. My right door speaker started
sounding sick...you know the ugly sounds due to the low frequency
resonances in the bass range. I went to Radio Shack and actually found a
salesperson who knew what he was doing...led me to an almost drop in
replacement.
So I replaced the speaker and the brand new one still vibrated at the bass
end...no jazz, no drums. I took the left (good) side apart and the old
speaker had a gasket between the cone mount and the cover. I made one and
the damn speaker still vibrated.
I removed the speaker and it sounded fine as it hung by the wires.
Conclusion: sympathetic vibrations somewhere...so I thought.
I remounted the speaker with its cover and just sat there musing about the
problem. What could be vibrating? And then an old bluesy singer came on
the airwaves and out came the bass. And as I watched, the cone vibrations
of the new speaker were so vibrant that the cone literally struck the
cover. I bent the cover out and voila, no more annoying resonance.
In retrospect, I realized that this problem was a testimony to the good
shape the car was in and its use this year. My wife's knee is level with
the cover when she sits so she imperceptible bent the cover into the door
(and the speaker) a tad more than it had been but it was a tad too much.
Who would have thought driving and enjoying the car would lead to such a
strange problem?
Bill Saidel
Dept. of Biology
Rutgers University
'76B
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