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<blockquote data-quote="zane" data-source="post: 9555" data-attributes="member: 540617">If you speaker wires are touching- your sub is getting misinformation from the amp.&nbsp;&nbsp; It would be basically shorting out the signal as the - and + are touching.These need to be shielded and kept separate from each other.+ to + and - to - so they are in phase.As pointed out allready, if doing this does not resolve your trouble; you likely have damaged the voice coil of the sub and it will need to be replaced.&nbsp; &nbsp; Kenwoods Tornado woofers are notorious for doing this at random, so if this is the case, I would blame more of a design flaw than your own install.&nbsp; &nbsp; I have only seen a small handful of Tornado&#039;s that have had no problems, and IMO- Kenwood needs to discontinue and re-design them all together.One test you may want to try is removing the woofer from its enclosure and running the speaker leads to a 6 or 9 volt battery.&nbsp;&nbsp; Connect the negative speaker lead to the negative battery terminal and then briefly touch the posative speaker lead to the posative battery terminal.&nbsp; &nbsp; Leave the woofer sitting facing up.&nbsp;&nbsp; When you do this, the speaker cone should move out ward.&nbsp; &nbsp; See if the scratching is still present while doing this, if so- then the VC is the problem.take it easy,-zane</blockquote>

[QUOTE="zane, post: 9555, member: 540617"] If you speaker wires are touching- your sub is getting misinformation from the amp. It would be basically shorting out the signal as the - and + are touching. These need to be shielded and kept separate from each other. + to + and - to - so they are in phase. As pointed out allready, if doing this does not resolve your trouble; you likely have damaged the voice coil of the sub and it will need to be replaced. Kenwoods Tornado woofers are notorious for doing this at random, so if this is the case, I would blame more of a design flaw than your own install. I have only seen a small handful of Tornado's that have had no problems, and IMO- Kenwood needs to discontinue and re-design them all together. One test you may want to try is removing the woofer from its enclosure and running the speaker leads to a 6 or 9 volt battery. Connect the negative speaker lead to the negative battery terminal and then briefly touch the posative speaker lead to the posative battery terminal. Leave the woofer sitting facing up. When you do this, the speaker cone should move out ward. See if the scratching is still present while doing this, if so- then the VC is the problem. take it easy, -zane [/QUOTE]

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