/b/ro Posted March 16, 2019 Report Share Posted March 16, 2019 I've been on this form before about the same thing, but I thought it would be more appropriate to post here. I've purchased four DC Audio Level 1 12"s. I don't a box that looked very similar to Steve Meade's "Bucket O' Bass" series. For whatever reason, one of my Subs blew. The coil is burnt up, but the other three are perfectly fine. I want to know what happened, and if it'll be covered under warranty. I doubt it'll be covered under warranty but it just seems to be a little suspicious that it was the only one that blew. Doesn't make any sense to me. Based on kirchhoff's law, shouldn't they all be taking equal current? I used Rockford Fosgate wiring wizard to make sure I wired it right. It was both me and my dad wiring it together, two set of eyes on this. I doubt we wired it wrong, wiring is super easy and my dad has done it all his life lol. I can send pictures of the sub and box. Also, the amplifier is not crazy over powered. It only has 100 extra watts per sub. Which it's always good to have Headroom. And no, I am not using the gain as a volume knob. I set my gain right. The app that I'm using is a QCA4000D, 2000w rms. I set the gain at 49v. E=√P•R E is volts, P is desired wattage, and R is resistance. I used that formula. E=√1200•2, E=√2400, E=48.989, That means, my AC output at max volume should be 48.989 (49 is fine). That's correct right? I doubt I screwed up that bad with simple gain settings. Also, if the amp is the problem, why would it only attack one subwoofer and not all of them? This doesn't make any sense... I'm kind of new to this, but this is seriously confusing me. Can anyone help? Quote Link to comment Share on other sites More sharing options...
/b/ro Posted March 16, 2019 Author Report Share Posted March 16, 2019 Also, when I did my first test bump, (when the sub blew), I didn't have the volume up. The subs were moving less than a centimeter. They were barely moving! I was only doing it to get a rough idea of what it would sound like. Just making sure I tuned the box properly. (And I did) 34hz. Quote Link to comment Share on other sites More sharing options...
ToNasty Posted March 16, 2019 Report Share Posted March 16, 2019 Amp may have been set wrong Quote ***Super Sellers List***http://www.stevemeadedesigns.com/board/topic/25829-super-sellers-buyers Link to comment Share on other sites More sharing options...
Ron36 Posted March 16, 2019 Report Share Posted March 16, 2019 Need to see pics of the box , sometimes airflow internally forces one sub to unload because all the pressure inside pushes more on that sub, but u said u also didn’t have them turned up so maybe not, If this was the first time they were fired they will be warrantied . Could have been a bad sub . Still would like to see pics and have your box specs. Quote 2022 Ford Maverick on 22’s Skar SK1500.1 on 4 Skar VD-8’s Mids Sundown Super tweeters, Skar TX 6.5 components on Skar SKM400.4 LC2 for audio control , XS Power D680 XS Series Extra Battery Link to comment Share on other sites More sharing options...
will77530 Posted March 16, 2019 Report Share Posted March 16, 2019 If it’s first sub seeing the power before the others that could be it amp can be set wrong can’t math away distortion can be a box issue as well Quote Link to comment Share on other sites More sharing options...
will77530 Posted March 16, 2019 Report Share Posted March 16, 2019 2 hours ago, Ron36 said: Need to see pics of the box , sometimes airflow internally forces one sub to unload because all the pressure inside pushes more on that sub, but u said u also didn’t have them turned up so maybe not, If this was the first time they were fired they will be warrantied . Could have been a bad sub . Still would like to see pics and have your box specs. Burnt coils rarely get warrantied coils don’t just burn themselves 1 Quote Link to comment Share on other sites More sharing options...
CstrokerV Posted March 17, 2019 Report Share Posted March 17, 2019 (edited) That amp is junk like I said before it’s not doing 2000rms..if you don’t believe me send it to bid d wiz ... . if you did the math the way you did for 2k no you didn’t do it right and no 49 wouldn’t of been ok and even with good amps it would of been better to go lower the higher so shouldn’t of went higher then the 48.9.. regardless... on a on a different note it’s looks like it’s only a 2 ohm stable amp you can still pick them up new at for $230 https://www.beachaudio.com/Quantum/Qca4000d-p-105824.html Edited March 17, 2019 by CstrokerV Quote my build http://www.stevemeadedesigns.com/board/topic/142505-small-build-log-4-dc-lvl3-10s-tl-update-link-to-rebuild/ http://www.stevemeadedesigns.com/board/topic/154258-rebuild-6-lvl3-12s-update-small-video-nothing-spectacular/ new build http://www.stevemeadedesigns.com/board/topic/188181-03-trailblazer-slow-build-8-dc-lvl3-12-m1-motor-m2-parts/ Link to comment Share on other sites More sharing options...
/b/ro Posted April 14, 2019 Author Report Share Posted April 14, 2019 On 3/16/2019 at 8:49 PM, CstrokerV said: That amp is junk like I said before it’s not doing 2000rms..if you don’t believe me send it to bid d wiz ... . if you did the math the way you did for 2k no you didn’t do it right and no 49 wouldn’t of been ok and even with good amps it would of been better to go lower the higher so shouldn’t of went higher then the 48.9.. regardless... on a on a different note it’s looks like it’s only a 2 ohm stable amp you can still pick them up new at for $230 https://www.beachaudio.com/Quantum/Qca4000d-p-105824.html Doesnt matter if its doing 2k rms, it only needs to do 1200. So, once again, doesnt matter. Also, I did the math the exact way that was shown to me from Sonic Electronix. Someone last I've always done their gain settings wrong, then idk. I didn't have it set at 2000 I had it set at 1200. Ill check it again though. But even if this were a gain problem, why is it that only one sub blew and the rest are perfectly unscathed? Alluding to basic electrical rules, each part of the circuit should take an equal amount of voltage. Not to mention that the volume was only a 1/4 of the way up. Quote Link to comment Share on other sites More sharing options...
ToNasty Posted April 14, 2019 Report Share Posted April 14, 2019 Them quality dc subs 😂 1 Quote ***Super Sellers List***http://www.stevemeadedesigns.com/board/topic/25829-super-sellers-buyers Link to comment Share on other sites More sharing options...
CstrokerV Posted April 14, 2019 Report Share Posted April 14, 2019 And the amp could of been still clipping at that voltage you set at that 1200 watts... and one sub going is not unheard of due to clipping with the other subs being fine. if that amp is only capable doing say 800 rms of clean power and you set it to 1200 rms then you clip the amp to hell and back ... box could of been an issue also... burnt coil is rarely due to manufacture defect and to user error Quote my build http://www.stevemeadedesigns.com/board/topic/142505-small-build-log-4-dc-lvl3-10s-tl-update-link-to-rebuild/ http://www.stevemeadedesigns.com/board/topic/154258-rebuild-6-lvl3-12s-update-small-video-nothing-spectacular/ new build http://www.stevemeadedesigns.com/board/topic/188181-03-trailblazer-slow-build-8-dc-lvl3-12-m1-motor-m2-parts/ Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.