When
you look at the hour hand on a clock it appears to stand still even
though it is changing.
Imagine
if hours were years, how hard it would be to see the hands move!
Your older speakers are also changing, but like the clock, it happens
so gradually it goes unnoticed.
Did
you know the foam ring circling the speaker cones rot? This loss
of compliance is the CAUSE of reduced fidelity in older speakers.
A
simple test to see if your speakers are OK requires removing
your speaker grill and using the eraser end of a pencil (or your
finger) and press lightly on the foam surround. A good speaker will
withstand a respectable amount of pressure. A bad one will allow
the pencil (or your finger) to pass right through it leaving a hole.
If
your speakers are beginning to loose this foam surround, be aware
that the condition can damage your amplifier. We have had great
success in restoring speakers with this problem using a new POLYETHER
foam. These foam does not rot 10 years down the road like yours
may be doing. This product exceeds the original factory performance
and provides consistent performance and high fidelity for the life
of the speaker.