| Blown Amp in JBL EON 15"? [message #27788] |
Mon, 25 December 2006 08:19  |
dlvr247
Messages: 1
Registered: May 2009
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Esquire |
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I've been the proud owner of 2 1st generation powered (bi amped) JBL Eon 15" monitors and they've endured enough to where I shouldn't question their longetivity but because I left them in a friends motorhome and it took some time and severe heming and hawing to get them back, I have to wonder...cuz they both sounded horrible when I finally plugged 'em in. Easy to realize that only the woofer was bumping, so the horns were gone. What bothers me is that both horns/amps would go out at exactly the same time, though I think my boy tried to bump the volume to insane levels by hitting the gain reserved for vocals and thus blew em at the same time. With what little I know about electronics, I took one apart and tried a mediocre bench test by hooking the pos/neg wires to a working speaker. I figured if the speaker worked, replace the horn, speaker don't work, one of the amps is shot and it's gonna cost a handsome Lincoln to fix'em. No sound;( Has this happened to anyone else? Is my bench test enough to convince you it's the amp.A lot of circuit boards inside look easy enough to replace if I could figure out which one to replace. An help appreciated.
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| Re: Blown Amp in JBL EON 15"? [message #27800 is a reply to message #27788] |
Wed, 18 April 2007 15:31  |
Chris R
Messages: 133
Registered: May 2009
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Master |
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Only rumor, but I heard that JBL used LM3886's (or similar) to power the horn. It looks like a T0-220 package, but wide, with 11 leads.
Its going to be hooked to a big heat sink. They are well protected internally, so maybe check for fuses to it.
Chris
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