Torres Posted October 27, 2008 Report Share Posted October 27, 2008 But covering the box with duck tape??? really? What is that suppose to do?MDF (if that's what your box is made out of...i think it is) is very porous. might not be so much a concern since there's not tons and tons of power in the box, but the duct tape would help seal it up. most people put it around the edge of the subsbut I guarantee it won't hurt your numbers heh.hmmm...i've heard that it can help in some cases, and can hurt in some cases. Not the results I was hoping for...maybe not the highest...but once you get it to that point again you know what will help now and if you add those up, you'll get that 148.2. 148.5 to be exact Quote Link to comment Share on other sites More sharing options...
Nightshade Posted October 27, 2008 Report Share Posted October 27, 2008 Gary where did you do the 147.7 at? Also where did you do the 147.4 at? The difference in location could be the deciding factor in your change in score. Elevation, humidity, and even temperature could have effected the score enough to have it drop a few tenths. Quote 2013 VW Jetta GLI 2.0 Turbo 1 Sundown Audio SCV2000 1 Sundown Audio X15 V2 1 XS Power D3100 Audio Control LC6i Stock Deck 146.4 sealed on the dash at 37hz 2001 Focus ZX3: RETIRED Team Sundown Audio, Team XS Power, 2 time NSPL Car 3601-Up Champion, 2 time NSPL Car Hardcore ChampionHighest NSPL Scores to date:154.3db on the dash sealed at 46hz, 156.2db in the kick at 46hz155.2db unofficial on dash at 43hz Link to comment Share on other sites More sharing options...
Decaf Posted October 27, 2008 Report Share Posted October 27, 2008 w3rd nightshade exactly what i was going to say.... not only that... unless u are 100% postive ur batts are fully charged each burp that will change #'s also, since its more depleted... do ur test while charging batts between... and do them as fast as possible so temp/humidity/whatever factors arent part of the change in #'s deadnin has always helped any install ive done... never seen it detriment unless it was a large vehicle that had many panels flexing (yukon xl) not sure if it was asked but has someone sat on the trunk while burping? Quote Link to comment Share on other sites More sharing options...
BigPimpin91 Posted October 27, 2008 Report Share Posted October 27, 2008 not sure if it was asked but has someone sat on the trunk while burping?I've seen people gain damn near a full db by doing this.Nick Probst to be exact. Quote BigPimpin91's Banging Music Link to comment Share on other sites More sharing options...
David Posted October 27, 2008 Report Share Posted October 27, 2008 Nope, only factory deadening. half the people I talked to says deadening helps the other half says no help. I would hate to be a the second group... I seen dampning kill numbers, I have seen dampning help, it all trial and error. I think Rusty from DC found that adding a body kit to Anna's rex hurt them, and they had to work hard to get it back. seeing how the box is fairly simple in design, I would start there, add resin 45's to some of your corners see if you get a gain or not, then maybe resin the whole inside of the box ro see if that speeds up your airspeed, technically it should, as smoother surface plain should allow more airspeed as it has less resistance. if you do any of this please post up results, I would be cuirous to know about the resin'd up 45s and the rest of the box being resin'd up and smoothed out. Quote Link to comment Share on other sites More sharing options...
Derrick824 Posted October 27, 2008 Report Share Posted October 27, 2008 not sure if it was asked but has someone sat on the trunk while burping? We have done a lot of testing and if you touch the back of the trunk in any way it hurts his score significantly. Holding the upper portion right below the back glass is usually good for a tenth or two. Quote Link to comment Share on other sites More sharing options...
ALPINE408 Posted October 27, 2008 Report Share Posted October 27, 2008 Well, the good news is you can get some of the off brands pretty cheap. And the worst that could happen is that it doesn't help, but I guarantee it won't hurt your numbers heh. I consider it mandatory with my installs. But that's just my opinion. Depends on the car! In my öld mazda i lost â full db i had 4 test boxes all lost a full db spent a day ripping of the roof and all 4 test boxes gained a db Now my boys truck all it did was raise the res. Freq. And gained â tenth of a db The mic might not like sound deading in some çars but it does all make them sound better even if you lose db's Quote Have you ever had your woofers blown? Link to comment Share on other sites More sharing options...
banginAltima Posted October 28, 2008 Author Report Share Posted October 28, 2008 Gary where did you do the 147.7 at? Also where did you do the 147.4 at? The difference in location could be the deciding factor in your change in score. Elevation, humidity, and even temperature could have effected the score enough to have it drop a few tenths. Set the 147.7 about two mile from my home. Temp might have been a little higher when I was doing some testing. Quote If you build it, db's will come... NSPL World Record Holder Trunk 0-1800 watts---147.9 with 1722 clamped watts @ 40Hz(9-20-09). Competition Only Record Holder Trunk 0-500 watts---148.1 2006 Nissan Altima 3.5 SE Currently Rebuilding.... My 150db Plus Trunk Build I do box designs. [benH] 6:24 pm: clipping doesn't really hurt subs [benH] 6:24 pm: being an idiot is what blows subs Link to comment Share on other sites More sharing options...
banginAltima Posted October 28, 2008 Author Report Share Posted October 28, 2008 if you do any of this please post up results, I would be cuirous to know about the resin'd up 45s and the rest of the box being resin'd up and smoothed out. I'll be sure to give an updated when I do the 45's Quote If you build it, db's will come... NSPL World Record Holder Trunk 0-1800 watts---147.9 with 1722 clamped watts @ 40Hz(9-20-09). Competition Only Record Holder Trunk 0-500 watts---148.1 2006 Nissan Altima 3.5 SE Currently Rebuilding.... My 150db Plus Trunk Build I do box designs. [benH] 6:24 pm: clipping doesn't really hurt subs [benH] 6:24 pm: being an idiot is what blows subs Link to comment Share on other sites More sharing options...
QCguy Posted October 28, 2008 Report Share Posted October 28, 2008 gary have you tried fiberglass resin in and out of the box i have had good luck with that also with no corners in the box and when you round them fill the area behind the curve with hard stuff (like concrete) all that is good for gains i have never had any of that or even heard of any of that hurting #s also if there is a way you can smooth your allthread out that helps pain in the butt it works though all it comes down to is that the smoother the box the louder less restriction the better as you know have you tried the "DB in a can" yet follow the rules but take different cans and place them in the car places it can be good for a tenth or so usually (ask sean DBmonkey) about it Quote VEHICLE:1993 Ford F-150 ELECTRICAL:1-350Amp 1-200Amp Idle Excessive Amperage Alts. BATT'S:13 Stinger SPV70's HEAD UNIT:Pioneer N1 MIDBASS:2 10" 2 8" Sundown prosound protos SUBS:3 NSv.2 18s in a series tuned 6th order SUB AMPS:3 Sundown SAZ-4500D MIDBASS/TWEETER AMP:Sundown SAX-200.4 Simon Eichenberger is the King Link to comment Share on other sites More sharing options...
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