New box
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Bronze Member Username: Nickadam55Post Number: 49 Registered: Feb-09 | Hey guys, I am thinking about building a new box for my subwoofers. I am sick of wasting my money on store boughts... does anyone have any resources to help me out.. or advice.. i have two rockford fosgate P3D212's i would greatly appreciate it! thanks |
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Silver Member Username: DangerangerOhio United States Post Number: 131 Registered: Mar-09 | get on Rfs website to see the recommended box size but use mdf 3/4 inch, drywall screws, liquid nails. countersink your holes, and also when on the website see what their optimal tuning is. It will be in HZ. |
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Bronze Member Username: Nickadam55Post Number: 50 Registered: Feb-09 | okay i think i figured it out.. i just doubled the length, bc i have two subs but i found a calculator online finally, the only thing left is if i should put a barrier wall between the two, the only problem i have with it is that i want to bridge them inside the box bc im running a one channel and i am going to only install one terminal on the box |
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Silver Member Username: Armykyle1Ms Us Post Number: 759 Registered: Dec-08 | sell em |
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Gold Member Username: The_image_dynamicSan Diego, California Post Number: 5335 Registered: Dec-06 | Just drill a hole in the center board and then caulk around the wire.   |
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Bronze Member Username: Nickadam55Post Number: 51 Registered: Feb-09 | Okay so will it be best to just do a solid enclosure no port no nothing or i think i might try to duplicate this box(pic) which will sound better |
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Gold Member Username: Hittin1TEAM REVOLUTION, La. Lake Charles... Post Number: 3838 Registered: May-07 | i would go ported, but there is no need to try and duplicate that build. there are plenty of different designs that would work.. what mono amp are you going to use? make/model you will need an amp that puts out ~500 wrms at 2 ohm (either 2 ohm stable 500 wrms amp or 1 ohm stable ~1000 wrms amp would be most common) you do not really need he center divider. A common chamber enclosure would do fine with a mono amp since both subs will be getting the exact amount of power from the amp. It looks like you will need ~4 ^3 ft tuned to ~35-37 Hz. not knowing your max dimentions I found you a box design that would work if the box would fit in your vehicle. If not let me know your max dimentions and I can find you a design or make one up real quick.  |
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Gold Member Username: Hittin1TEAM REVOLUTION, La. Lake Charles... Post Number: 3839 Registered: May-07 | btw I was going by RF powerful box size recommendations... they can go in ~1.25^3 ft each if space is an issue. |
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Bronze Member Username: Nickadam55Post Number: 52 Registered: Feb-09 | I am going to run them at one ohm and my amp will put about 1k at 1 ohm. i dont have my car here right now  but i will get you the demensions, I would have a good picture if i could get my autoCAD running. but again I was going to build 15.125x33.875x16.375 (H,W,D) but you are saying i will need 4 cu. ft. in my box @ about 36 hz?? i figured 1.25 cu ft @28 hz?? dammit show me where i went wrong.. but the box described has i think bout 3.68 cu. ft. think it will cut it. ( remember i have two subwoofers) |
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Bronze Member Username: Nickadam55Post Number: 53 Registered: Feb-09 | Okay so i am going sealed thats it. I am confused on calculating the hz and volume for TWO subwoofers in the same box! HELP!! |
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Platinum Member Username: Nyyfan13Northern VA Post Number: 11598 Registered: Jul-06 | Can't tune a sealed box so don't worry about that. As for calculating volume, just take the dimensions of the box and subtract .75" off each dimension for the width of the MDF and then mulitply LxWxD and divide that by 1728. Then subtract each subs displacement and then your good  |
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Bronze Member Username: Nickadam55Post Number: 55 Registered: Feb-09 | okay so if the volume needed for one sub is 1.25 would i double that for two subs? |
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Gold Member Username: Hittin1TEAM REVOLUTION, La. Lake Charles... Post Number: 3841 Registered: May-07 | how are you gonna run 2 subs that are dual 2 ohm v.c at 1 ohm? you can only wire both of them @ .5,2,and 8 ohm. if your amp puts that much power at 1 ohm, it will work great if you wire your subs at 2 ohms. |
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Silver Member Username: Tiki89Post Number: 347 Registered: Oct-06 | you can always use www.subwoofertools.net to figure it out for you..... |
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Silver Member Username: EricmbWaycross, Georgia United States Post Number: 136 Registered: Nov-08 | yeah, for 2 i would go around 3.25-3.50 cu ft. and tune the box around 36-38.. they really like the high tunings more but tuning it around 36 will throw some better lows in there.. and i def would not go sealed on these, i liked ported on mine ALOT more. use this to design it, its soo easy.. http://reaudio.com/speaker_box/LPort_Box_Calc.html |
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Bronze Member Username: Nickadam55Columbia MO, Missouri Post Number: 57 Registered: Feb-09 | No i have 4ohm voice coils mark. Fosgate leans more tword sealed box but said it really dident matter. thanks |
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Bronze Member Username: Nickadam55Columbia MO, Missouri Post Number: 58 Registered: Feb-09 | sorry i meant P3D412s |
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Silver Member Username: Armykyle1Ms Us Post Number: 792 Registered: Dec-08 | I've never heard of anyone recommending a sealed box for P3s. That's flat out stupid. What made you want to buy P3s in the first place? |
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Gold Member Username: Hittin1TEAM REVOLUTION, La. Lake Charles... Post Number: 3843 Registered: May-07 | definately go ported... And what amp make/model are you referring too? |
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Gold Member Username: Hittin1TEAM REVOLUTION, La. Lake Charles... Post Number: 3844 Registered: May-07 | 1000 wrms is far too much for the P3's... you will need to cut the amp back if it is a true 1000 wrms amp. I've asked you what amp a few times, and usually (not always) when no response is given to that question, the amp is something like a 1000w sony or some sh!t. |
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Bronze Member Username: Nickadam55Columbia MO, Missouri Post Number: 59 Registered: Feb-09 | LOL I havent had anything sony since the second grade, and it was a Christmas present(Sony walkman yeahh!!), on a more serious note it is a RF P1000-BD the cretificate says it will 1437WMAX so if you multiply that by .707 gives me RMS so it is a little over 1000.. RF.com says go more towards sealed, but the fu**ing box they sell for it is ported! i sketched up a box last night and i came up with 16X36X12.75 which gives me 3.257cu.ft. If i go ported will i hear sound difference? if it was your stuff what would u do (and dont say sell it lol) Thanks Mark. |
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Gold Member Username: TurnmatWww.j-designs.org Post Number: 1112 Registered: Feb-07 | I would do what every one else has been saying...go ported. You will be much happier with it ported. |
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Silver Member Username: EricmbWaycross, Georgia United States Post Number: 141 Registered: Nov-08 | nick, trust me.. ive had those exact speakers and in a sealed box will get loud(not sounding good), but will get alott louder(still not sounding good) in a ported box. |
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Silver Member Username: EricmbWaycross, Georgia United States Post Number: 142 Registered: Nov-08 | and saying fosgate leans more towards sealed, thats not the company voting on that.. thats the people buying their products. and for them to be voting on sealed, much less buying that product in the first place, somethings gotta be wrong in their heads.. haha but anyways trust us/me!! |
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Platinum Member Username: Rovin1 15 = 152.5 DBs ...Trinidad & T... Post Number: 15485 Registered: Jul-05 | what u can do is buy 2 4" aeroports from parts express instead of doing slot port - box will be smaller too ... |
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Bronze Member Username: Nickadam55Columbia MO, Missouri Post Number: 61 Registered: Feb-09 | Okay thanks guys ported it is then! i will update you guys with pictures next week! |
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