Funny problem w powered JBL sub |
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(((THUMPER)))
Registered User Joined: 19 March 2010 Location: Way Out West Status: Offline Points: 70 |
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Posted: 20 March 2010 at 1:31am |
I have no idea what the idiots I let barrow them did but its my problem now. I own a set of JBL powered subs w complimenting passive subs. These speakers didn't have a real long production run n I think I'm learning why. They can be found here http://www.hoffmanmusic.com/itemdesc.asp?ic=51500050&eq=&Tp= The internal channel on the powered sub in question is fine. However whenever I plug in a speaker and feed a signal that channel instantly flashes, then a split second later they're both going on like strobes. The passive drivers are both fine because I tested them on a good working amp. Its just the one 'jacked-up' channel. Does this mean they killed my amp? How do I determine what the problem is and what part to replace? Please phrase your replies in 8th grade level language THANX! |
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"...like a big paper dragon..."
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4936 |
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Can you re-word your fault description? What is going on like strobes? What is a jacked-up channel?
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Kevin
North Staffordshire |
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djshaney
Young Croc Joined: 12 May 2009 Location: middlesex Status: Offline Points: 830 |
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i take it you mean the signal lights?
and jacked up = fucked |
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The Builder
Old Croc Joined: 03 January 2010 Status: Offline Points: 3107 |
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It just is.
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djeddie
Old Croc Joined: 26 April 2004 Location: Bristol Status: Offline Points: 4125 |
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Just a thought, but have you checked the leads? Might have a short in one of them.
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Chas n Dave : it's like Drum and Bass but with beards. E=mc² ±3dB
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service dept Steve
Old Croc Joined: 30 January 2010 Location: S.W.London Status: Offline Points: 2034 |
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If the passive cabs work and the active cab works on it's own and it only sh*ts it's pants when they are both connected together then it must be the leads unless by a very long shot the power supply is just about holding on with 1 speaker on it but can't bear 2, that's not likely though. Check your cables and then check them again.
>Most failures in electronic systems are at connectors< |
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We are not "They", We are "The others"http://www.servicedept.co.uk -
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Centauri
Old Croc Joined: 29 November 2004 Location: Newcastle Aus Status: Offline Points: 1792 |
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I believe these subs have two power amps - one for internal and one for the extension. As mentioned above, it could be a shorted extension cable or a fault with the extension power amp.
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