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New member Username: MunkyPost Number: 1 Registered: Oct-07 | OK, so I have a Boss Chaos 800W amp and 3 JL 10s. Started off w/ the same amp and 2 MTX 4500 12s. Anyway, my problem, I run the amp on the 2 12s when I bought them, and they worked fine. Starter went out on my Honda, so I changed it. When I got in the car to leave my moms house, my speakers would hit one time, music or no music, and then the amp would go into protection. Thought it was my ground so I re-ran that, didnt help. Thought it was my control, re-ran that. Same thing. Anyway. Now I have the 3 10s and that same amp in an 07 Ion, and it does the same thing! Hits once, music or no music, and goes into protection. I dont think it's the amp because I hooked my roomates XPlode amp up to it and it happened to his too... What could be the problem? |
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Silver Member Username: KaerfplSpencerport, NY USA Post Number: 650 Registered: Jun-06 | Which one of theses amplifiers do you have? http://www.sonicelectronix.com/item_7739_Boss+CH1500D.html http://www.sonicelectronix.com/item_6870_Boss+CH850M.html http://www.sonicelectronix.com/item_6666_Boss+CH550.html Also, what kindof JL subs do you own? Regardless of what is what, I believe your amplifier is doing this because the amp is not able to support the JL's and MTX's. |
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New member Username: MunkyPost Number: 2 Registered: Oct-07 | I have the last amp. I'm not sure what kinda of JLs I have. I talked to a friend of mine, and he said that when they changed out my starter on my Honda, that they must not have un-connected the battery and that may have done it. Because the amp worked fine until I had my starter changed. |
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Silver Member Username: KaerfplSpencerport, NY USA Post Number: 656 Registered: Jun-06 | Ok so you have the two channel amp then. In that case, you are bridging the subwoofers into a 4ohm load to create 800 watts. Only problem is that when you combine three of those subwoofers, you are not creating a 4ohm load. If you have three subwoofers that are: SVC 4ohm = 1.34 ohm load. DVC 4ohm = 2.67 ohm load. DVC 2ohm = 1.34 or 3 ohm load wired in series. Heres the web site where you can check all this out: http://www.the12volt.com/caraudio/woofer_configurations.asp Your MTX 4500's were probably wired into a 4 ohm load through series: http://www.the12volt.com/caraudio/woofer_configurations.asp?Q=2&I=42 When you replace a starter in any car you have to disconnect the battery so, it is possible that whom ever did that may have shorted out the amp. Regardless to say, the only way you could use that amp with those JL's would be to only use two of them. Three just wouldn't work with the ohm settings. If your going to look for another amp, look for something that can support a 1ohm load. Heres a few for example: http://www.sonicelectronix.com/item_6522_Hifonics+BXi+1206D.html http://www.sonicelectronix.com/item_7560_Orion+HCCA-D1200.html http://www.sonicelectronix.com/item_9927_Memphis+16-PR1.500.html http://www.sonicelectronix.com/item_7369_PowerBass+ASA+1000.1D.html If you can tell me what the voice coils are on your subwoofers and the RMS, I can find you an amp that will work great with them. |
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New member Username: MunkyPost Number: 3 Registered: Oct-07 | I'm not sure if their dual VC or not, the JLs. I dont think they are, but I'm not sure. I bought em off a guy at work, for my "Ol Lady's" car, The Ion. And Option 2 is how I had the 4500s wired up. Why do you think it did the same thing with my roommates XPlode? |
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Silver Member Username: SomedonniedudePost Number: 311 Registered: May-07 | Have you been blowing any fuses? Do you know where your voltage is at with the car running and when it is off? What guage wiring do you have? When your head unit comes on, is that when it makes a quick thump-like sound? Sounds like a bad amp so far. Having those subs wired at an ohm load that the amps not stable at will not cause that amp go into protect mode upon startup. If anything only put one sub on the amp and see what happens. Also if you do buy another amp, make sure you know the ohms of the coils like joe said. It should say it all on the bottom of the magnet along with that type of jl it is. |
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New member Username: MunkyPost Number: 5 Registered: Oct-07 | I had the REM wire ran to the ignition fuse, and I did blow it. I dont know squat diddly about voltage. 8GA. Yes. |
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Silver Member Username: KaerfplSpencerport, NY USA Post Number: 657 Registered: Jun-06 | Best place to run your REM wire is through the Power On wire in the back of your HU. This way, when you turn on your HU, the amp will turn on as well. When the REM is attached to the ignition wire/fuse, the amp will turn on when you start your car, regardless if you have your HU on or off resulting in possible damage to your amp. Also, I think 8 gauge wire may be a little excessive for your Boss amplifier.Bigger isn't always better. If you run a thicker wire, you may be sending more power to the amp than it really needs and can cause damage to the amplifier. Although, when your amp was working, if it didn't get hot really quick or go into protection mode when you really crank it up, then I guess the 8 gauge wire is fine. For the thump sound you were talking about, sometimes when you turn off your HU or amp, your subs may already be pulled back and ready to fire and when you turn your music back on, the subs will bump. Look on this web page to see if these are any of your JL subwoofers: http://www.sonicelectronix.com/viewcat.php?show_thumbnails=1&show_description=1& id=40&car_only=&page=1&manufacturer=21&new_page=1 |
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New member Username: MunkyPost Number: 6 Registered: Oct-07 | I had the REM wire ran to the ignition fuse because the factory HU is still in the Ion. I didnt wanna mess with the onstar and all that crap. So I just kept the factory HU. And the 8GA wire is what I've always had, in the Ion and in the Honda. Worked fine before. |
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Silver Member Username: SomedonniedudePost Number: 312 Registered: May-07 | Dont know much about the thump thing (maybe a HU ground??) My first system I ever had did that and i had a cheap VR3 headunit (also could be the nature of the HU). Its not from the subs being pulled back, being that they sit neutral when off. I dont think having the amp on when the radio is off will hurt things too much imo. If your amp is turning on (even if its in constant protect mode) then your rem wire is fine. The 8 ga is just fine with that amp, but if you get a bigger amp you will probobly want to go to 4 ga. Check your fuse(s) and holder(s) for discoloration or corrosion and make sure grounds are sanded and every connection is tight. I once had a kenwood amp that had a light for low voltage and when that came on it the protect light also came on. Before you decide on what to do too much Id wait for some other opinions from more people. Good luck. |
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New member Username: MunkyPost Number: 7 Registered: Oct-07 | I grounded it out at the battery. With the battery in the trunk, that just seemed like the easiest place to do it. Fuses look fine to me. No discoloration or corrosion. And what the subs are doing, is sucking in then blowing out...once they blow out, the amp goes into protection. I fried a 400W amp earlier messin w/ it. Had the REM wire loose so I could pull it away from the screw. Before I killed it though, it would do the same thing my 800W amp is doing. And Joe, going by the pictures on your link, mine are one of the first two. |
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Silver Member Username: SomedonniedudePost Number: 313 Registered: May-07 | I dont know if this could cause it, but make sure all your subs are wired correctly, and i dont necessarily mean ohm load wise, but that no positive and negatives on the subs coils or even box terminals are mixed wrong. You really should pull those subs and get them rewired correctly. I just looked at the link for the wiring diagram joe posted, if you ran that amp like that, then im really guessing that amp is trashed. If your mtx's were the dual 4 ohm verion and you ran that amp bridged with that first wiring, then you ran that amp @ 1 ohm instead of the recommended 4 ohms. If you ran each sub wired that way, but not bridged on them (seperate channels) then you were ok. Option 2 is the way you should have ran them if the amp was bridged. |
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New member Username: MunkyPost Number: 8 Registered: Oct-07 | Amp was bridged, and Option 2 was the way I wired them. I'll check into the wiring of the subs tomarrow, I'm about to go to bed. |
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Silver Member Username: •cam•Post Number: 915 Registered: Nov-06 | There is no such thing as using too large wire. The amp will draw whatever amount of current it needs, larger wire will have a lower resistance, which means less voltage drop. |