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Short Wave Sportfishing[_2_]

On Sat, 22 Mar 2008 17:33:39 -0700 (PDT),
wrote:

On Mar 22, 6:56*pm, wrote:
On Sat, 22 Mar 2008 21:41:54 GMT, Short Wave Sportfishing

wrote:
On Sat, 22 Mar 2008 17:13:31 -0400, "Eisboch" wrote:

"D.Duck" wrote in message
...

Does the speaker have foam suspension? *After some years that foam will
break down. *I had some 15 year old speakers repaired and they sounded as
good as new.

Doubtful that a guitar amp speaker would have foam suspension, particularly
one from the 80's. *Even new ones are hard to the rim.

But, that doesn't mean the paper hasn't been torn or otherwise deteriorated
from it's mounting.

Could be a bad voice coil.

That would be my guess, and for good reason. He says that if he plays single
notes lightly, it's fine, but when he plays loud chords, it sounds awful. The
voice coil probably has a burn in a spot that is beyond the amount of movement
caused by a light single note, but gets reached when you play louder and the
coil excursion increases.

Then again, if the amp is from the 1980's the speakers are deteriorated
regardless of whether they buzz or not.

Sounds reasonable. how do I identify the voice coil on the board, can
I test without a schematic?

Take the grill off the front of the speaker, put your hands on either
side of the speaker and gently press the speaker cone in a couple of
times. You will proably hear a scratching noise and the movement will
feel rough. That means the voice coil is bad. If you don't get the
scratching noise and sandpaper feel, then it's good and probably the
cone is bad.

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