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Hi, i have jbl 1201.1 running 2 audiobahn aw1200v subs, i used to have 2 jl audios but the amp blew them, when i turn up to about 32 volume the subs cut out, they come on and off, amp doesnt go into proect mode, no drop in voltage, power cap stil reads over 12... can any1 help ?

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  • mad mannan Apr 06, 2008

    solved the pro, the ohs wernt matchin, hve replaced system with directed 2400 amp + 2 audiobahns, now pumin loud!!!!

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Well first off the cap should be reading 14.00 volts not 12 but check on ur settings maybe its to high if that dont work then ur amp or amps is way to powerfull for those sub or theres not enough watts from the amp to the sub causeing the amps to under power the subs but let me no if u got it im all wayz here to help

Posted on Apr 05, 2008

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1 Answer

Jl 1000.1 Bottoming out my sub at very low volume...i have a 1000d cross fire mono block that POUNDS my sub and doesnt bottom it out.. but when i hook up the JL i get to quarter volume and the sub starts...


Check The Settings On The Amp.... There Is Probably a Setting Turned All The Way To Max on it. Is There 2 Rca Cables Hooked to It ? Try Switching them around And Seeing if It Gets Better Or Un Plug one of them And See if It Gets Any Better, Would Definitely Check The Settings On The Amp First to See if That your Problem. Hope This Helps :-)

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I like JL Audio's products and in this case a 1000/1 would match these subs really well considering that each sub is rated at 600 watts RMS. I know that you want to bring these subs to the max and if you're not worried about blowing them up you can use two JL Audio 1000/1's, the JL amps have something called ohm matching and can put out 1000watts RMS at any load between 2ohms and 16ohms. A very use full feature - as well as a subsonic filter that can keep out the bass you can't hear and thus keep your subs alive longer especially if you plan to max em' out. Check out Ebay for good prices on JL Audio. Another choice might be an Audiobahn 2300, or preferably an 1800d. D class amps are best for max output and I've wired an Audiobahn 1800d down to a 1 ohm load (to two dual 4 ohm 15" Cerwin Vega Strokers paralleled down) and it was able to stay alive, but this was not used for prolonged listening (Short bursts for SPL comps). Good luck and I'll leave you with an old trick I used to use on my clients SPL Comp cars. Run an in-line fuse to each sub - start at about a 100amp fuse (1,000w @ 12v = 120 amp draw) and move it up if it blows too early, fuses are cheaper than subs! Let me know what box you are running as it must be built specifically for running the subs all-out. You can e-mail me @ (dynami28@charter.net) for free specs on basic enlosures.
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Does the amp have a volt meter on it? That tends to be pretty helpful in determining if it has enough power. I had to run an 8 gauge wire from my battery to the amp to get enough current to power an audiobahn 6 channel 6601t, with a dual voice-coil audiobahn 12 inch eternal. In the summer mine hits a thermal protection unitl I roll down the windows and ventilate the car, but that does not sound like thermal to me. It could also be the wrong impedance for your amp/sub combo. If you are making these speakers distort, you should be deaf by now. a 1000 watt amp is no force to be reckoned with. Your sub is 1.5 to 4 ohms. I posted a link to where you can check if it is wired properly. If these are distorting, it sounds like you have these wired for the wrong impedance. There is no way you should be making this setup distort at all without blowing out windows. It could be that you need 2 batteries, or if you are a pro DIYer Get some A123 batteries from a dewalt product. They have insane discharge. But I would recommend just getting a new battery (see bottom link), and making sure you have a 4-8 gauge wire going to the amp. I know a lot about batteries, as I built my own EV, so tell me how you have these subs wired, and how you have the amp wired to the battery.
http://www.crutchfield.com/S-B5qDIPXbsfV/learn/learningcenter/car/subwoofers_wiring.html
http://akamaipix.crutchfield.com/ca/learningcenter/car/subwoofer_wiring/2DVC_4-ohm_mono.jpg
http://www.optimabatteries.com/audio_electronics/

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Are you sure you don't have any shorted wiring or defective speakers?


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You can connect them in a series/parallel configuration. Put two of them in series and then connect the last one in parallel across the two in series. This would give you an impeadance of around 2.7 ohms. Only do this if your amp is stable at 3 ohms or less. I am not familiar with the specs of your amp. If your amp is only 4 ohm stable you can not do this.
This would also give you half the power on the two subs in series as the power for the one that is parallel. The two in series would be sharing the total output signal, where-as the one in parallel would get the entire output signal from the amp.
if you were to connect a fourth sub woofer in this configuration it could give you a 4 ohm load, by adding the fourth sub in series with the single sub that is in parallel. or in other words, yu have two sets of 2 sub woofers each in series. That gives you two 8 ohm loads (two 4 ohm subs in series is 8 ohms). Then you take the two sets of subs and parallel them (two 8 ohm loads in parallel equals 4 ohms).

If i had a picture to show you it would make sense, two subs in series that are in parallel with two subs in series.

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