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Checking subs and amp with DMM
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<blockquote data-quote="smgreen20" data-source="post: 5982507" data-attributes="member: 560505"><p>Your subs are "scratchy" when you push down on them?</p><p></p><p>That's the number 2 sign of blown subs. Number one sigh would be fire/smoke. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif When speakers short or the coils burn, they usually burn in half. That break in the VC is where the scratching sound will come from as you push on the speaker cone. It also opens the circuit so that the amp no longer "sees" a load to "push", which is why you have no sound.</p><p></p><p>For a simple test use one of your mids (preferably an extra speaker you might have laying around) and at LOW volume, hook it up to the sub amp and see if the speaker plays. If it does you can now rule out the amp.</p><p></p><p>Set your DMM to VAC</p></blockquote><p></p>
[QUOTE="smgreen20, post: 5982507, member: 560505"] Your subs are "scratchy" when you push down on them? That's the number 2 sign of blown subs. Number one sigh would be fire/smoke. [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] When speakers short or the coils burn, they usually burn in half. That break in the VC is where the scratching sound will come from as you push on the speaker cone. It also opens the circuit so that the amp no longer "sees" a load to "push", which is why you have no sound. For a simple test use one of your mids (preferably an extra speaker you might have laying around) and at LOW volume, hook it up to the sub amp and see if the speaker plays. If it does you can now rule out the amp. Set your DMM to VAC [/QUOTE]
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Checking subs and amp with DMM
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