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    Whats wrong with my amp???

    Hey guys.. here's whats goin on.. I shorted out my JBL bp1200.1, and sent it in.. I got a brand new one returned to me about a week ago. I hooked it up to the subs i had, 2 JBL GTO1220 12". They are single 2 ohm coils, so i just hooked them up to a 2 ohm stereo on the amp, which would equal a 1 ohm mono load inside the amp. It worked out just fine until i blew the subs. I traded them in on a pair of Lightning Audio S3.10.vc2's. Dual 4 ohm coils. So, i paralleled the 2 coils on the subs to 2 ohms and wired it to the amp again in a 2 ohm stereo load. Which, again would show the amp a 1 ohm mono load inside. However, this time, the amp is not responding well. I have the gains set the exact same as before, both the level and the bass boost about half way. But, now when the volume is up, the amp ges into protect for a second. Its fine of long bass notes, but when the bass is a fast beat or when the bass note changes, the amp flashes the red protect light along wih the green power light and just skips through bass notes until you turn it down. It sounds like the bass would with a skipping cd. Any ideas??

    Adam







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    Re: Whats wrong with my amp???

    Is the 1200.1 1-ohm stable? i thought it was only stable to 2-ohm. In any case, you could always try putting a fan or 2 on it. and even if that doesn't help the bass skipping, it can't hurt it anymore and will only keep it cooler.




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    Re: Whats wrong with my amp???

    mihgt wanna check your power wire? make sure it didnt short out and throw a crusty slam to one of you subs b4 it died.

    also, check the fuses on the amp. perhaps take it apart and see if u notice anyhting *if you know what your doing* maybe they didnt fix it well or didnt at all. my friend had that prob, the company didnt even fix it and sent it back new.

    also, are the JBLs stable at 1ohm? at first i thought no b/c they rate at 2ohms, but everyone here says they are stable and put out just over 1400@1ohm, some say they get hot. wtf is up.

    someone with a JBL 1200.1 working, plz clarify b/c i planne don buying one




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    badazzDD's Avatar
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    Re: Whats wrong with my amp???

    Yes, the are stable at 1 ohm.. this is the third one i have used, every one at 1 ohm,and this is the first problem i am having with it...




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    Re: Whats wrong with my amp???

    sometimes my fuses are ALMOST burned into but not quite and the amp would cutoff ... make sure they are fully there




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    Re: Whats wrong with my amp???

    I used to run a JBL 600.1 it did run a stable 1-ohm load but........ sound quality was horrible. I'm not exactly sure how to describe it but I'll try. The amp just seemed to have no control over the subs. It was muffeled, and lacked punch. I was running 2- Infinity Perfects dual 4ohm in a sealed enclosure. Although most will laugh- the subs sounded cleaner on a WalMart Jenson amp with less power. So I wired up just one sub with a 2ohm load, and WA-LAHH!!! Sound was much improved! I'm not a techie but I believe it had to do with the 1ohm load cutting the damping factor in half. Most will say this spec. means nothing. Maybe there right, and maybe there wrong. This is just one man's experience



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    Re: Whats wrong with my amp???

    ok, since your relatively new, i'll try not to be rude, but this thread is almost a year old. please don't bring up old topics. thanks.




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