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o8mustang13

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Posts posted by o8mustang13

  1. 2 15's or 3

    in General Audio - Can't find a category for your question? Ask here.

    Posted

    the port calculator that im useing says that for it to be tuned to 30 hx it needs 299 inches for the port do you have a calculator you could use to get me exactly what i need?

    Edit before the displacemnt of the port the box is at 9.948 ft3 and that is including the woofer displaceement and the bracing displacement.

    does anybody have a reliable port calculator they could send me the link to it woudl be greatly appreciated..

  3. 2 15's or 3

    in General Audio - Can't find a category for your question? Ask here.

    Posted · Edited by o8mustang13

    150 to 180 inches of port area should be good for 9 cubes. you may have to shrink it down to be able to have the 30 hz tune and not have to port be 40 or so inches long. unless you find more room for the added volume

    the port calculator that im useing says that for it to be tuned to 30 hx it needs 299 inches for the port do you have a calculator you could use to get me exactly what i need?

    Edit before the displacemnt of the port the box is at 9.948 ft3 and that is including the woofer displaceement and the bracing displacement.

  5. 2 15's or 3

    in General Audio - Can't find a category for your question? Ask here.

    Posted

    you could go down to 3 cubes per sub, if you want to do 3 subs. but make sure you can have a good size port too.

    also, dont just brace you box with sheets of fiberglass, you need some threaded rod or some other kind of cross bracing

    thats what i was thinking was 3 cubes per sub and as for bracing i was thinking about doing two vertical 2x2 and then one 2x2 across the width of the box and then 2 more 2x2 going the depth of the box as well as all of the fiberglass.

  7. 3 15's or 2 18's

    in General Audio - Can't find a category for your question? Ask here.

    Posted

    Yeah, I like them by 2 !!!

    Are you sure you have room for a box with 2 big woofers in a 'stang ? Even without rearseats ?

    We're talking about an 8 cu ft box (gross).

    yes i actaully do have the space it will be up to the heigth of the rear deck level and from the rear deck all the way up to a few inches behind the back seat so i can still move them with what i have planned for space i have 11 ft3 befreo woofer disp and port disp

  12. Batteries and alts

    in General Audio - Can't find a category for your question? Ask here.

    Posted

    Good luck with getting dual alts. I tried to get a dual alt setup a couple months ago, and nobody would do it. But if you do the get duals somehow, let me know. Just go for one alt, highest output you can get.

    yeah thanks on that one i know it will be a challenge but if i have to i will make my own brackets and relocate a few things if i can and if i do get it done i will for sure let you know and help you out

  13. 2 15's or 3

    in General Audio - Can't find a category for your question? Ask here.

    Posted · Edited by o8mustang13

    yea, around that, but then youll need to account for port volume and sub displacement too. not enough room from you measurements you already put

    the measurement i put the first time are using 1" MDF if i shrink that to 3/4" minus sub and port displacement i get 11 ft3 and using the 3/4 i will fiberglass the box with 29 oz mat to compensate for the thickenss and also the front and top of the box will have a secong sheet on those to flush mount the subs a little bit.

    edit: with sub displacement i have 10.28 ft3 have yet to calculate port

  16. Batteries and alts

    in General Audio - Can't find a category for your question? Ask here.

    Posted

    It would not really matter if he is going to be running them at 2 ohms each or 1 ohm each. From what I can see, and same with Neo is that he is going to be running 1 2500 to each coil. It still going to be pulling some good current. I also agree with Neo on running atleast 2 300 amp alts, or the biggest ones that will fit on your engine. Your also going to want to get as many batteries that you can get and fit into your ride.

    What car is this going into by chance?

    edit: Some replies came while I was typing my reply. But I'm still going with what I said

    edit 2: Your in Mammoth, damn my grandparents and my aunt live in Bishop. I go up there atleast once a year. Should meet up sometime if you dont mind.

    NO i would be down to meet up with you i will only be in mammoth until late july early august as im moving to sac to go to school ( wyotech) but sure if you want once i have the final plans decided on this project im going to start the build.

  17. Batteries and alts

    in General Audio - Can't find a category for your question? Ask here.

    Posted · Edited by o8mustang13

    Ohm load doesnt really matter in this instance.

    One amp per coil. or 2 strapped amps per sub.

    Those amps can do same power at various impedances and actually draw very similar power from the electrical at various ohm loads.

    OP.

    Its simple to design your electrical layout. First figure what your current draw will be.

    In the case of 6) RF 2500s. You may draw upwards of 250A per amp. Times 6 this is 1500A. At full power of 15,000w, and 75% efficiency, you may draw up to 20,000w of power at short bursts.

    So choose the amount and size of batteries that can supply that amount of power.

    The XS Power D3100 is rated up to 5000w. So 4 of them would do ya good.

    Now, choose an alternator capable of keeping the batteries charged.

    XS Power batts have very low ESR and are easy to charge. But its still 4 big batts. So the minimum charging for each battery would be based on its capacity and ESR. The batts do have a large capacity. 75A of charging is the minimum I would recommend for each D3100. But the more you get, the longer you can perform at peak.

    So at very least a 300A alt.

    Thank you very much that was exactly what i was looking for was something like that. I appreciate tha tyou explained it as well so i could understand thank you for the information. i really do appreciate it.

    Edit: with what you said would two 300amp alternators be enough and i was thinking about four xs 3100's in the back and then one up front would that be good oh also should i add on one more batter to take care of the mids/highs/

  18. Batteries and alts

    in General Audio - Can't find a category for your question? Ask here.

    Posted · Edited by o8mustang13

    It would not really matter if he is going to be running them at 2 ohms each or 1 ohm each. From what I can see, and same with Neo is that he is going to be running 1 2500 to each coil. It still going to be pulling some good current. I also agree with Neo on running atleast 2 300 amp alts, or the biggest ones that will fit on your engine. Your also going to want to get as many batteries that you can get and fit into your ride.

    What car is this going into by chance?

    im going to put this into my 2008 mustang gt as a rear seat delete for the subs and all fo the amps and batteries will be in the trunk and trunk will be completely isolated from the rest of car.

  19. Batteries and alts

    in General Audio - Can't find a category for your question? Ask here.

    Posted

    what voltage were you wanting to run? 12v, 16v? before getting 5 d3100s, i was going to go with the d1600, and would reccomend running one d1600 for every 1500 watts. super pricey, not including the shipping. but it also depends on useage, daily or competition?

    definitely twin alternators, but the batteries are going to come down on how you plan on using the system, as if 3 of those badboys would be for daily use only, lol and at what voltage.

    and i dont know on the batteries thats why i asked beucase im not the best with the electrical i am used to doing all the building im up for all suggestions and it woudl be for a combinations of daily and comp.and im thinking 12v but i dont really know thats why im asking

  25. Building a box....please help

    in General Audio - Can't find a category for your question? Ask here.

    Posted

    haha sorry, I just ran out and measure the amount of space I had to work with, I though thats what I was supposed to do.

    haha yeah you were sorry my mistake on that one there but you have plenty of space you could probably get away with keeping your other seats up and sitll have the space to build it your will only need about 8 ft3 probable do you know how much space the woofer displaces and also did you want to do a slot port for them or aero and also do you want them to each be in their own box or one big box??

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