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Silver Member Username: MendonmafiaUSA Post Number: 782 Registered: Aug-06 | ok so im still trying to design a new box for my new subs because i want the most out of them but i dont think i will be able to fit any box larger than my current box into my trunk even if i temporarily take the back seat out cuz i dont think it will fit in the door opening. but anyways i am thinking of using polyfill. im just wondering do i calculate the port tuning based on the box without the polyfill or do i calculate it based on the effective volume with the polyfill? also how much volume does polyfill "add"? |
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Platinum Member Username: BestmankindRD 1000.1D with SI MAG... Post Number: 17036 Registered: Oct-05 | i only saw people use polyfill with sealed boxes. |
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Platinum Member Username: WingmanaliveA pic is worth 1000 posts!! Post Number: 12573 Registered: Jun-06 | "also how much volume does polyfill "add"?" That's a good question. There are many variables. http://web.archive.org/web/20020808224043/integra.cyberglobe.net/caraudio/resour ces/fiberfill/ |
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Silver Member Username: SkaPost Number: 114 Registered: Jan-08 | if you use a sealed box do that, but if your going ported, don't use poly, it throws off the tuning of the port |
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Silver Member Username: MendonmafiaUSA Post Number: 783 Registered: Aug-06 | damn! i think im screwed because my maximum outer dimensions are 37.5 wide, 14.5 high, and 25 deep" that only equates to 6.16 internal cubic feet total im not gonna have any room for a decent sized port. |
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Silver Member Username: SkaPost Number: 116 Registered: Jan-08 | what about adding a port on the out side? instead of having it on the inside? because with ports your lose alot of cube feet to the port but having it exturnally might fix it, but idk how that would affect the port tuning :-( |
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Silver Member Username: MendonmafiaUSA Post Number: 784 Registered: Aug-06 | that might work but i dont think it will help much because the ports still must exit out the front of the box. my problem is that i want to be able to get to my spair if i need it but my trunk opening is only 12 tall and 11 deep and gets very narrow at the bottom only like 32 inches wide, even tho my trunk is nearly 17 cubes net. this prohibits me to make a box that will fit into trunk opening. And the space under the rear deck has a retartedly huge support beam that will only allow me to have 14.5 inches tall and 37.5 inches wide and thats pushing it (thats how wide and tall my current box is and i have to take the entire rear seats out in order to install or remove it due to the slant in the seats when they are folded down) |
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Platinum Member Username: BestmankindRD 1000.1D with SI MAG... Post Number: 17039 Registered: Oct-05 | why don't you use aeroports. less displacement. also don't worry about port area too much in your case. better to build the box as biggest possible and sacrifice some port area than to build a box too small so you can have bigger port area. |
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Silver Member Username: MendonmafiaUSA Post Number: 786 Registered: Aug-06 | but how much output would i lose between 100 and 50 sqin of port if their both 5 cubes net? |
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Gold Member Username: InsearchofbassPost Number: 7571 Registered: Jun-04 | "but anyways i am thinking of using polyfill. im just wondering do i calculate the port tuning based on the box without the polyfill or do i calculate it based on the effective volume with the polyfill?" with polyfill (in sheet form for a ported box and staple or glue it in) and use Paul Larrea's link as a guide....you could also stuff the sheet in temporarily by packing it semi tight without glue or staples to see how you like the sound or to mess with tuning |
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Gold Member Username: Mj23dynastySome where 12 wangin o..., The Mighty J... USA Post Number: 1081 Registered: Oct-07 | Why don't you just go with a different pair of subs that sound good sealed or require less box size. Ikno the sx doesn't need a huge box but if it isn't ideal for you to go with those subs bcuz of the box situation they maybe you might want to change your mind. Or you could go with a single subs setup that compares to the SX's |
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Silver Member Username: MendonmafiaUSA Post Number: 787 Registered: Aug-06 | well i have 2000 rms @ 1 ohm so i want to utilize that to its full potential. and i want a lot of SPL but am not turned off by SQ(obviosly) so can you reccomend a single sub that will get just as loud as the sx's or 2 12's that will get just as loud sealed? |
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Gold Member Username: Mj23dynastySome where 12 wangin o..., The Mighty J... USA Post Number: 1083 Registered: Oct-07 | A 12"? Or can u squeeze a 15" n there? |
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Gold Member Username: Mj23dynastySome where 12 wangin o..., The Mighty J... USA Post Number: 1084 Registered: Oct-07 | Never heard either but maybe a loaded BTL ported might out do 2 SX's or gimme a sec to check something |
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Gold Member Username: Mj23dynastySome where 12 wangin o..., The Mighty J... USA Post Number: 1085 Registered: Oct-07 | Try 2 12" Soundstream SPLX in a sealed box their is a guy tht works at a pep boys around here that has 1 15" in a acura coupe and tht things slams pretty hard. Now idk how they will compare to the SX's but its worth a shot plus from what I hear SX's destroy ur car and I'm sure u dnt want tht. |
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Gold Member Username: Mj23dynastySome where 12 wangin o..., The Mighty J... USA Post Number: 1086 Registered: Oct-07 | O and 1 more!! I'm sure they don't get as loud as the SX's. But kicker CVX's get LOUD in sealed enclosures 800 RMS a piece I'm sure your prolly not interested in those but sometimes you gota settle for less if u dnt have the space requirements you know what I mean?? |
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Platinum Member Username: BestmankindRD 1000.1D with SI MAG... Post Number: 17045 Registered: Oct-05 | 100 sq in for a 5 cuft box??? are you only going for spl or something? |
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Silver Member Username: MendonmafiaUSA Post Number: 788 Registered: Aug-06 | "A 12"? Or can u squeeze a 15" n there?" id prefer a 12 or 2 cuz my opening into the cabin is only 14.5" maximum but i could deffinately squeeze a 15 in there. "what I hear SX's destroy ur car and I'm sure u dnt want tht." yes i do lol. "100 sq in for a 5 cuft box??? are you only going for spl or something?" i am going for mostly spl but i dont want it to sound like trash either. A friend of mine suggested doing half of the total cone area for thhe port area. he said that would sound really good. hes really into sq so i listened to him. Chad, do you think 75 sqin would be good or should i go smaller still. i would prefer to go as small as possible but i dont want to lose output or have port noise, cuz i hear these subs move a ton of air. |
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Platinum Member Username: BestmankindRD 1000.1D with SI MAG... Post Number: 17046 Registered: Oct-05 | i would do 50 sq in for 5 cuft box. not a big fan of big port area. i like to go by 10sq in per cuft. sometimes 8. |
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Silver Member Username: MendonmafiaUSA Post Number: 789 Registered: Aug-06 | wow thats gonna save me a ton of room if i do 50. but am i going to lose output and/or have vent noise with a pair of sx's in there? |
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Silver Member Username: MendonmafiaUSA Post Number: 790 Registered: Aug-06 | i think this might call for a new thread. |