dual voice coil sub wiring quandry - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-13-2007, 10:13 AM   #1
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Default dual voice coil sub wiring quandry

the best information i can give is the hard-soldered connection that id been using for five years (was wired by a professional installer, i soldered it when i got home to make it permanent) inside my box from a dual voice coil sub to the terminal inside the box.....

i think the way it was done so was parallel because it was the only sub in the install and i was bridging my only amp to only power this sub. im pretty sure it was wired like this:

the connection suddenly failed (after 5 years of working properly) (no smoke or weird smell like it was blown) i have narrowed it down to absolutely no other option other than the sub.

i connected the bridged amp directly to the sub in several different ways (at an exceedingly low output) and listened for any sound to come out of the sub. the way that it is shown in the diagram conceived no output however, i want to say that perhaps the connecting the + and - from the amp to the two positive connections did (?)

assuming this information to be true......does this sound like i destroyed one of my voice coils, and perhaps the sub would still partially work if wired a different way? can a dual vc sub run on one voice coil?

biggest question i guess is "should i buy another one?"
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Old 02-13-2007, 10:23 AM   #2
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when out of the box, does the cone move? Normally when you blow a voice coil, due to the extra burned/moved material the cone doesn't move very freely. Do the solder joints look good still?

Do you have any other speakers you can test with?
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Old 02-13-2007, 11:42 AM   #3
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i have cooked a sub before (how i learned full gain isnt a good idea) so i immediately checked the free-movement of the cone, and it is good.

the solder joints are pretty crappy (i didnt clean the flux off and it started to mold, ick) so i ripped the sub out and went right from my amp to my sub.

also, tested with another speaker, the amp gives good signal

the protect light on my amp is not illuminated

im stumped, but i think i need a new sub

thanks for your reply
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Old 02-13-2007, 07:13 PM   #4
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if you have a multi meter that can test resistance, grab it. Toss it on resistance and see what the resistance of the voice coil is. go from one terminal to the other. If you dont get anything then the coil is either very blown or there is a connection issue elsewhere in the sub.

if the amp still puts out and can play other speakers I would defintely lean towards the sub being bad.
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