Blew Subs From Audible thumps at 0 volume

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02-11-2009, 04:21 PM

#11

ryan_t888

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I used my 12v 30A power supply to power my amp in the house. I ran 2 8" subs off the amp for around 30minutes. Amp was fed 13-15v from the power supply throughout the test. RCA's ran from my sub pre out on the stereo.

I listened to music for 30 minutes while changing the volume from 0 to 1/2 or so. Never once heard any distorted "thumps" at any volume range including 0.

I guess now I should start looking in to my car's RCA's, Ground Wire, and maybe perhaps the deck as well? What would be the best way to go about this?

Thanks
Ryan

02-11-2009, 05:26 PM

#12

Father Yuli

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this can hapen when your amp grounds thru the rca's.

02-11-2009, 05:49 PM

#13

Brad-S.A.

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Quote:

Originally Posted by ryan_t888

Alright, EHR told me the coils had been burned. And to be honest I've never smelt anything like that before in any of my previous subs. The odour from the subs did not smell anything like glue, it smelt like burned insulation from wire.

How ever I don't have the subs anymore so it is not of concern.
Could I place a voltmeter on the samp speaker terminals and watch for eratic jumps in output voltage when there is no input signal/rca's?

Ryan

A voice coil isnt insulated, so you were not smelling burned isulation.

02-11-2009, 09:08 PM

#14

ryan_t888

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Quote:

Originally Posted by Father Yuli

this can hapen when your amp grounds thru the rca's.

Could you go in to further detail about this. I am not quite sure what you mean.

Quote:

A voice coil isnt insulated, so you were not smelling burned isulation.

Lol, come on. Any coil of wire MUST be enamel insulated or it would be a direct short from each winding of the coil. If you do a search you will see what I mean.

Ryan