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Is it the speaker?

 
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TINKERTAR



Joined: 25 Oct 2003
Posts: 1071
Location: DFW MidCities

PostPosted: Sun Jul 04, 2010 2:48 pm    Post subject: Is it the speaker? Reply with quote

This weekend I just cranked up my late model Fender Frontman 212, only to hear it sound like one of speakers wasaassssssssssssssssssssssss bad. ...heard a definate buzz when a note was played.
My first check was to feel the speaker cone for vibration, and one of the speakers has no vibration on the cone at all.
Amps and Electronics are definately not my bag, so....Is it a pretty good guess that one of theses speakers is busted?

i have no wish to spend a lot of $ on this amp, so does anybody have any suggestions as to a comparible replacement speaker for this 12" fender speaker.

Thanks in advance....

Tinkertar
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Structo



Joined: 21 Nov 2004
Posts: 26415
Location: Salem, OR

PostPosted: Sun Jul 04, 2010 3:01 pm    Post subject: Reply with quote

Do you have a DVM handy?

If so, disconnect the speakers from each other and measure the resistance of each one.

If they are 8 ohm speakers, they will read around 5-6 ohms.

If they are 16 ohm speakers they will read about 12 ohms.

Another test is to gently push down on the cone from the front of the speaker.
You have to have access to the front of the speaker for this test.

If you feel any roughness then that is called coil rub and it is the voice coil rubbing against the channel in the magnet.
It will eventually wear through the enamel on the wire and either open the coil or short it out.
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TINKERTAR



Joined: 25 Oct 2003
Posts: 1071
Location: DFW MidCities

PostPosted: Sun Jul 04, 2010 10:46 pm    Post subject: Reply with quote

Structo..
Thanks for your help.!

I will give it a shot tomorrow.

Tinker
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