alpinef150 Posted March 30, 2013 Author Report Posted March 30, 2013 here is the box on the calculator. would it help if I took some pics of the box itself?
alpinef150 Posted March 30, 2013 Author Report Posted March 30, 2013 the port is not using any existing walls of the box. its sort of like steve meades Tahoe table box for the 4 18's. the subs require 5.5 to 10 ft^3 per for a ported box so they are well within the requirements, but only require 750 watts rms which seems a little low to me. not sure what the deal is but it does not sound good at all. also if it helps the box is in a 2001 expedition.
Jessica Posted March 30, 2013 Report Posted March 30, 2013 um, did you say 2 18's? and you have 14.5 cuft net? isn't that a bit much? edit reading > me. nevermind Rest in peace, walled 87 accord build log 03' Corolla build with AA Mayhem inside. My super random youtube channel and terrible camera work. Wiring comparison by CaptainzPlanetz Wire and fuse guide by Guest SyKo13
alpinef150 Posted March 30, 2013 Author Report Posted March 30, 2013 Yes. I had them wired in series parallel to 1 ohm on a hifonics 1000.1 just to test it. They were underpowered buy a few hundred watts but still, from my experience I know it should have been louder. I tried running each sub at 2 ohm each on a hifonics 1000.1 which have them 750 rms per and it still was not loud at all. It didn't move hardly any air at all and sounds more airy than bass. I also tired covering up the port to rule it out but even then the same sound level and airy sound contiued.
Jessica Posted March 30, 2013 Report Posted March 30, 2013 pics of the box could help. that big of a box, did you add bracing? is it single wall 3/4" mdf like torres shows? also, pics of how its sits in the vehicle can help too. ignore my previous post. lol Rest in peace, walled 87 accord build log 03' Corolla build with AA Mayhem inside. My super random youtube channel and terrible camera work. Wiring comparison by CaptainzPlanetz Wire and fuse guide by Guest SyKo13
Guest Posted March 30, 2013 Report Posted March 30, 2013 is the box sealed at the joints? something about you saying you just cut and screwed it together, makes me think you're having major leaks.
alpinef150 Posted March 30, 2013 Author Report Posted March 30, 2013 @ Strangeuck, yes! I think it is too big too but I'm going by the box recommendation by PSI This subwoofer can be upgraded from its standard performance level by selecting the "High Performance" option. Heres what all upgrades youll get for the Platform 1 Series 18": Extended length aluminum flatwound voice coil Stiffer single spider suspension Power handling increase from 750 watts to 1000 watts RMS. Power Handling Ratings: Standard RMS Power Handling - 750 watts Hi Performance RMS Power Handling - 1000 watts Peak Power Handling - 1500 watts Standard features include: Dual stacked 6.7" x 1" Y35 ceramic slugs Chrome top and bottom plates FEA optimized motor assembly 12 spoke aluminum cast frame - Black Chrome push terminals or 10ga CCA direct connect Standard length 4 layer aluminum roundwire voice coil Dual 1 and Dual 2 ohm standard impedances 8" progressive roll poly-cotton spider Sewn 3mm heavy duty leadwire Kevlar impregnated pulp cone body 1.5" wide roll rubberized foam surround 6" polypropylene dome dustcap PSI logo Enclosure Recommendations: Sealed - 3-4 ft^3 Ported - 5.5-10 ft^3 This product may also be used in Infinite Baffle and Bandpass applications. Please contact us before purchasing this product for these installations to make sure that the standard parts will be compatible with your enclosure. T/S Parameters for standard Platform 1 18": Revc = 1.5 or 3.0 ohms Fms = 26.3 Hz Qes = 0.85 Qms = 9.6 Qts = 0.782 Sd = 1230cm^2 Vas = 290.1 L BL = 15.25 Mms = 277.1 g Sensitivity = 89.8 dB @1W/1m Sensitivity = 90.4 dB @2.83Vrms/1m Xmax = 56mm total Usable excursion = 3.5" total Product Dimensions: Overall diameter - 19.5" w/ gasket Cutout Diameter - 16.75" Mounting Depth - " Displacement in enclosure - .18 ft^3 Weight - 33 lbs These subwoofers are fully upgradeable and can be custom built for almost any application type. If you would like to further customize this series of subwoofer, or need for it to work in an installation that does not fit the standard criteria listed above, please submit a Custom Subwoofer Request.
Guest Posted March 30, 2013 Report Posted March 30, 2013 doesn't matter if you have them wired to 1 ohm using parallel/whatever method. if a single + and - are switched, it can cause the problem you're having. you have them wired EXACTLY like this?
alpinef150 Posted March 30, 2013 Author Report Posted March 30, 2013 I'm sure it has some leaks only being glue and screwed. It's not completely braced yet either. But could a few leaks make this big of a difference?? Just by the looks of things I feel like the box and port are too big for 2 18s but I just designed based off the requirements.
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