650rcode Posted February 9, 2012 Report Share Posted February 9, 2012 Hey guys looking for some advise on a box that I built for a friend. Subs are 6 jl audio 12w3v3-4ohm svc. Box is around 11.4 net tuned to 33hz. Subs wired to .67 ohm on a jl 1000/1, given box rise I told the guy that it should be fine and system tuned with SMD-DD1. Now the problem, when turned up the speakers start to make a popping/ crackling sound, sounds horrible like if the subs were bottoming out. I suspect that it's a loading issue because the port is facing the rear with subs up and port is on the bottom middle of the box. The port is 7.75 inches tall so seems to me that the middle subs are loading faster and causing them all to sound like crap. I'll be putting in 3 2x4 s going across and screwing pieces of mdf on those to create equa-distant(sp) loading walls for all of the subs. Hopefully some of you who have experienced this can chime in to give some insight. Quote 2003 Mach 1 Build HU: Alpine CDA-9857 Sub: Fi Bl 4"VC fully loaded Sub Amp: RF 1500-1bdcp Highs Amp: Kicker KX650.4 Highs: Polk Audio db 6.5 comps Epicenter Link to comment Share on other sites More sharing options...
will77530 Posted February 9, 2012 Report Share Posted February 9, 2012 dont count on box rise in daily applications.... what are the dimensions of the box Quote Link to comment Share on other sites More sharing options...
ChevyBoy95 Posted February 9, 2012 Report Share Posted February 9, 2012 pics of box? they shouldnt crackle even if not getting enough power. Quote Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's] BL : http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/YouTube: http://www.youtube.com/hitemwiththeflex/ Link to comment Share on other sites More sharing options...
SnowDrifter Posted February 9, 2012 Report Share Posted February 9, 2012 Doesn't sound like a loading issue. But don't ever count on box rise to save you on music. Just look at the subs: are they bottoming out? The amp may not even be able to handle a load that low. What sort of voltage do you have at the amp? Big 3 done? Checked rcas? No loose power/ground connections? Quote ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444 Link to comment Share on other sites More sharing options...
sayhuh? Posted February 9, 2012 Report Share Posted February 9, 2012 almost 3 cube per 12? and wouldn't it be 1 ohm with 4 SVC? Quote Blown Link to comment Share on other sites More sharing options...
650rcode Posted February 10, 2012 Author Report Share Posted February 10, 2012 He does not have big 3 done but does have 0awg power and ground. I would have liked to wire them at I higher ohm load but I couldn't fid another way to wire 6 4-ohm single voice coil subs. Iirc I think each sub has about 1.8-1.9 cubes. Dimensions are 49w by 28 d by 21h double baffled top piece. Port is 7h by 20w by 18d on the bottom middle of the box, I used Torres' calc. If I can figure a way to Post pics on my iPhone I will if not I'll have to wait till I get home. Quote 2003 Mach 1 Build HU: Alpine CDA-9857 Sub: Fi Bl 4"VC fully loaded Sub Amp: RF 1500-1bdcp Highs Amp: Kicker KX650.4 Highs: Polk Audio db 6.5 comps Epicenter Link to comment Share on other sites More sharing options...
650rcode Posted February 10, 2012 Author Report Share Posted February 10, 2012 here's a pic of the box Quote 2003 Mach 1 Build HU: Alpine CDA-9857 Sub: Fi Bl 4"VC fully loaded Sub Amp: RF 1500-1bdcp Highs Amp: Kicker KX650.4 Highs: Polk Audio db 6.5 comps Epicenter Link to comment Share on other sites More sharing options...
will77530 Posted February 10, 2012 Report Share Posted February 10, 2012 does it do it on all songs or just some? at all volumes or jut full tilt? Quote Link to comment Share on other sites More sharing options...
STEvil Posted February 10, 2012 Report Share Posted February 10, 2012 (edited) Series-parallel the drivers. 4-4-4 = 1.33 4-4-4 = 1.33 1.33+1.33 = 2.66 http://www.bcae1.com/spkrmlti.htm Edited February 10, 2012 by STEvil Quote MickyMcD - "Capable of making some serious trouser flapping volumes at where's-my-testicles frequencies, the Servo-Drives used to be fairly jaw dropping..." Any time you have have a power wire next to your frame put some rubber hosing (or cut up an innertube) around it. The wire is bound to wiggle (due to driving or flex) and the casing will eventually wear through. Hammerdown... 1% no links to outside websites, business related FB/YT pages allowed. Link to comment Share on other sites More sharing options...
MrFree Posted February 10, 2012 Report Share Posted February 10, 2012 I have the same problem with a 150watt jenson.I tryed plugging my 2 12" pioneer's into the bridge terminals and it would cut out and pop everytime it hit Quote R.I.P...99'Dodge Grand Caravan 03 Lancer Oz Big 3 HU-JVC KD-530 RCA's-rockerfosgate 41/2 inch Infinity mids Subs-(12's)2 Orion xtr124 Amp-Coustic600se battery-2 x stock, 1x Shuriken SK-BT20 Box-L-ported 3.562cubes@35Hz miscellaneous-stinger volt-meter, gain nob, (coming soon bass pro,eq,line drive) I dont have flex yet but damn I sound good,(coming soon....flex) Check out my HHR install Everything I install or build here:http://s1160.photobu...s/q485/MrBfree/ Also video's of my Car with the new box.http://www.youtube.c...lentGyge/videos Link to comment Share on other sites More sharing options...
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