Closed Thread
Page 2 of 4 FirstFirst 1 2 3 4 LastLast
Results 16 to 30 of 54

Reload Thread: Ported vs. PR for my application

  1. #16
    gckless's Avatar
    gckless is online now CarAudio.com Veteran

    Threadstarter


    Join Date
    Aug 2011
    Location
    San Antonio
    Posts
    4,251
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    1838 Post(s)

    Re: Ported vs. PR for my application

    Quote Originally Posted by hispls View Post
    You can't get a pair of 18" PR's on that box?

    I expect when the new Sundown cones/spiders/frames come out those would make a good platform for super excursion PR, at the moment I'm not sure what'll have more throw than Ti basket with 10" spider to do 1:1 area and get away with throwing that kind of power at them.

    Also if your goal is music you can probably get away with a bit less port area especially with flared ends if you're trying to get tuning down.
    It would take some work cutting it just right. The box is 19" OD high including double baffle, so it would take some work. So question is, would it be worth the extra work/cost?

    The ported box is good to go as the design in the first post. Just wondering if PR would be worth it.



    Quote Originally Posted by ducatipaso View Post
    15inch subs can't play fast beats, they take more power and that taxes the vehicles electrical system. You will wake up and "hear" then see the light at the end of the tunnel and it will be 3 10's pounding so hard you wont even open your trunk or turn your system on because you 15's will sound sloppy & weak.
    Quote Originally Posted by benbenondatrack View Post
    stfu lesbo.why are you worried about me so much? you must want to date me ya little cookie monster but i dont even like sweets. your just a cup full of ice, dirt dead nasty azz ice...without the water.

    Dat Build Log: http://mobileaudioforum.com/forum/showthread.php?2566-1999-Chevrolet-Blazer&highlight=1999+blazer




  2. #17
    hispls's Avatar
    hispls is offline CarAudio.com Veteran



    Join Date
    Sep 2009
    Location
    Cape Cod, Massachusetts
    Posts
    6,449
    Post Thanks / Like
    Images
    15
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    2018 Post(s)

    Re: Ported vs. PR for my application

    Quote Originally Posted by gckless View Post
    It would take some work cutting it just right. The box is 19" OD high including double baffle, so it would take some work. So question is, would it be worth the extra work/cost?

    The ported box is good to go as the design in the first post. Just wondering if PR would be worth it.
    Well you could easily free up a couple cubes of volume and have the ability to modify tuning easily (assuming it's a decent PR with a good way to add and remove mass). If you want to tune really low and space is an issue it's the way to go IMO. I think the only reason you don't see them used a lot more is the price.




  3. #18
    gckless's Avatar
    gckless is online now CarAudio.com Veteran

    Threadstarter


    Join Date
    Aug 2011
    Location
    San Antonio
    Posts
    4,251
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    1838 Post(s)

    Re: Ported vs. PR for my application

    Here's what WinISD says for graphs:



    Blue is my current box design (as shown in OP), red is a vented tuned to 24Hz (this is my PR for the graph), and yellow is sealed.



    Quote Originally Posted by ducatipaso View Post
    15inch subs can't play fast beats, they take more power and that taxes the vehicles electrical system. You will wake up and "hear" then see the light at the end of the tunnel and it will be 3 10's pounding so hard you wont even open your trunk or turn your system on because you 15's will sound sloppy & weak.
    Quote Originally Posted by benbenondatrack View Post
    stfu lesbo.why are you worried about me so much? you must want to date me ya little cookie monster but i dont even like sweets. your just a cup full of ice, dirt dead nasty azz ice...without the water.

    Dat Build Log: http://mobileaudioforum.com/forum/showthread.php?2566-1999-Chevrolet-Blazer&highlight=1999+blazer

  4. #19
    mat3833's Avatar
    mat3833 is offline CarAudio.com Elite



    Join Date
    Mar 2008
    Location
    florida
    Posts
    1,060
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    227 Post(s)

    Re: Ported vs. PR for my application

    in my experiance PRs dont actually perform as modeled. they have always performed better. BUT if you can get the 2 18" PR's in there you would be golden. the thing i like most about PRs if you can essentially change tuning freely. i had a PR box in my HT for awhile. and i had the PR inverse mounted so i could simply remove or add weights when i wanted. listening to music? remove weight to get ~34hz tuning. watching movies with buildings falling and explosions? add weight to your hearts desire. im sure either way you go you will end up being happy, but with PRs you will be unique(somewhat).

    Matt



    Star Mountain Nuthugger #5
    12" TC9 in 1.39 cubes @30hz
    Boston Acoustics GT-2300 @4 ohms bridged.

    Quote Originally Posted by double 07 View Post
    Sub cutout got a little skar on it...dad blamed round over bit bearing came flying off.......LOL.......
    Quote Originally Posted by gckless View Post
    A little Skar on it? Was it a B-stock bit?
    Refs:
    bought from Nitefury360, Tallic, SPLaudio X2
    Traded with Marleyskater420

  5. #20
    gckless's Avatar
    gckless is online now CarAudio.com Veteran

    Threadstarter


    Join Date
    Aug 2011
    Location
    San Antonio
    Posts
    4,251
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    1838 Post(s)

    Re: Ported vs. PR for my application

    Quote Originally Posted by mat3833 View Post
    in my experiance PRs dont actually perform as modeled. they have always performed better. BUT if you can get the 2 18" PR's in there you would be golden. the thing i like most about PRs if you can essentially change tuning freely. i had a PR box in my HT for awhile. and i had the PR inverse mounted so i could simply remove or add weights when i wanted. listening to music? remove weight to get ~34hz tuning. watching movies with buildings falling and explosions? add weight to your hearts desire. im sure either way you go you will end up being happy, but with PRs you will be unique(somewhat).

    Matt
    Yeah dude, I'm leanin towards them. Gonna play with my box design in a bit and do some math and see what I can do as far as fitting those 18" PSI PR's.



    Quote Originally Posted by ducatipaso View Post
    15inch subs can't play fast beats, they take more power and that taxes the vehicles electrical system. You will wake up and "hear" then see the light at the end of the tunnel and it will be 3 10's pounding so hard you wont even open your trunk or turn your system on because you 15's will sound sloppy & weak.
    Quote Originally Posted by benbenondatrack View Post
    stfu lesbo.why are you worried about me so much? you must want to date me ya little cookie monster but i dont even like sweets. your just a cup full of ice, dirt dead nasty azz ice...without the water.

    Dat Build Log: http://mobileaudioforum.com/forum/showthread.php?2566-1999-Chevrolet-Blazer&highlight=1999+blazer

  6. #21
    gckless's Avatar
    gckless is online now CarAudio.com Veteran

    Threadstarter


    Join Date
    Aug 2011
    Location
    San Antonio
    Posts
    4,251
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    1838 Post(s)

    Re: Ported vs. PR for my application

    So playing around a little, and tuning to 24Hz with two 18" PR's in 8 cubes will require an additional 400g of weight on each PR (that's if my math is right, probably way off). That's a lot of weight, and not sure how group delay and things like that are affected when weight gets big like that. Can anyone school me on sonic qualities?



    Quote Originally Posted by ducatipaso View Post
    15inch subs can't play fast beats, they take more power and that taxes the vehicles electrical system. You will wake up and "hear" then see the light at the end of the tunnel and it will be 3 10's pounding so hard you wont even open your trunk or turn your system on because you 15's will sound sloppy & weak.
    Quote Originally Posted by benbenondatrack View Post
    stfu lesbo.why are you worried about me so much? you must want to date me ya little cookie monster but i dont even like sweets. your just a cup full of ice, dirt dead nasty azz ice...without the water.

    Dat Build Log: http://mobileaudioforum.com/forum/showthread.php?2566-1999-Chevrolet-Blazer&highlight=1999+blazer

  7. #22
    mat3833's Avatar
    mat3833 is offline CarAudio.com Elite



    Join Date
    Mar 2008
    Location
    florida
    Posts
    1,060
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    227 Post(s)

    Re: Ported vs. PR for my application

    dont quote me on this since ive always just followed the formulas and not really gotten into theory. the weight on the PR is there to simulate the port. to find the weight you find port volume and multiply by the weight of air. essentially a PR is just another stylr of "ported" enclosure. the only problem you can run into is if you have heavy PRs they NEED to be counter-balanced. put one on each side of the enclosure if you can. having nearly a pound of weight moving on one side of the enclosure can cause it to rock and even tip over(please dont ask me how i know this...). ill check ur math in a few min once i dig up my spreadsheet. group delay should be bettter than ported and slightly below sealed. below tuning frequency GD is worse than ported.

    Matt



    Star Mountain Nuthugger #5
    12" TC9 in 1.39 cubes @30hz
    Boston Acoustics GT-2300 @4 ohms bridged.

    Quote Originally Posted by double 07 View Post
    Sub cutout got a little skar on it...dad blamed round over bit bearing came flying off.......LOL.......
    Quote Originally Posted by gckless View Post
    A little Skar on it? Was it a B-stock bit?
    Refs:
    bought from Nitefury360, Tallic, SPLaudio X2
    Traded with Marleyskater420

  8. #23
    gckless's Avatar
    gckless is online now CarAudio.com Veteran

    Threadstarter


    Join Date
    Aug 2011
    Location
    San Antonio
    Posts
    4,251
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    1838 Post(s)

    Re: Ported vs. PR for my application

    Quote Originally Posted by mat3833 View Post
    dont quote me on this since ive always just followed the formulas and not really gotten into theory. the weight on the PR is there to simulate the port. to find the weight you find port volume and multiply by the weight of air. essentially a PR is just another stylr of "ported" enclosure. the only problem you can run into is if you have heavy PRs they NEED to be counter-balanced. put one on each side of the enclosure if you can. having nearly a pound of weight moving on one side of the enclosure can cause it to rock and even tip over(please dont ask me how i know this...). ill check ur math in a few min once i dig up my spreadsheet. group delay should be bettter than ported and slightly below sealed. below tuning frequency GD is worse than ported.

    Matt
    Appreciate it. Total weight would be like 801g for each PR, and mms is 420g for each with no weight on them. So that's 3.5lbs moving on the one side of the box. Mounting one on each side is out of the question, so I would just have to secure it well I guess.



    Quote Originally Posted by ducatipaso View Post
    15inch subs can't play fast beats, they take more power and that taxes the vehicles electrical system. You will wake up and "hear" then see the light at the end of the tunnel and it will be 3 10's pounding so hard you wont even open your trunk or turn your system on because you 15's will sound sloppy & weak.
    Quote Originally Posted by benbenondatrack View Post
    stfu lesbo.why are you worried about me so much? you must want to date me ya little cookie monster but i dont even like sweets. your just a cup full of ice, dirt dead nasty azz ice...without the water.

    Dat Build Log: http://mobileaudioforum.com/forum/showthread.php?2566-1999-Chevrolet-Blazer&highlight=1999+blazer

  9. #24
    mat3833's Avatar
    mat3833 is offline CarAudio.com Elite



    Join Date
    Mar 2008
    Location
    florida
    Posts
    1,060
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    227 Post(s)

    Re: Ported vs. PR for my application

    how do you plan on having the box laid out? if its like the picture you can get away with moving the subs to the front top and the PRs to the back Side.

    Matt



    Star Mountain Nuthugger #5
    12" TC9 in 1.39 cubes @30hz
    Boston Acoustics GT-2300 @4 ohms bridged.

    Quote Originally Posted by double 07 View Post
    Sub cutout got a little skar on it...dad blamed round over bit bearing came flying off.......LOL.......
    Quote Originally Posted by gckless View Post
    A little Skar on it? Was it a B-stock bit?
    Refs:
    bought from Nitefury360, Tallic, SPLaudio X2
    Traded with Marleyskater420

  10. #25
    gckless's Avatar
    gckless is online now CarAudio.com Veteran

    Threadstarter


    Join Date
    Aug 2011
    Location
    San Antonio
    Posts
    4,251
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    1838 Post(s)

    Re: Ported vs. PR for my application

    Quote Originally Posted by mat3833 View Post
    how do you plan on having the box laid out? if its like the picture you can get away with moving the subs to the front top and the PRs to the back Side.

    Matt
    Yep, same design, just will shave the sides to make up for the space addition from removing the port. Probably center the subs. PR's will be rear-facing, on the same face as the port is now.



    Quote Originally Posted by ducatipaso View Post
    15inch subs can't play fast beats, they take more power and that taxes the vehicles electrical system. You will wake up and "hear" then see the light at the end of the tunnel and it will be 3 10's pounding so hard you wont even open your trunk or turn your system on because you 15's will sound sloppy & weak.
    Quote Originally Posted by benbenondatrack View Post
    stfu lesbo.why are you worried about me so much? you must want to date me ya little cookie monster but i dont even like sweets. your just a cup full of ice, dirt dead nasty azz ice...without the water.

    Dat Build Log: http://mobileaudioforum.com/forum/showthread.php?2566-1999-Chevrolet-Blazer&highlight=1999+blazer

  11. #26
    mat3833's Avatar
    mat3833 is offline CarAudio.com Elite



    Join Date
    Mar 2008
    Location
    florida
    Posts
    1,060
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    227 Post(s)

    Re: Ported vs. PR for my application

    what are the dimensions of that side?

    Matt



    Star Mountain Nuthugger #5
    12" TC9 in 1.39 cubes @30hz
    Boston Acoustics GT-2300 @4 ohms bridged.

    Quote Originally Posted by double 07 View Post
    Sub cutout got a little skar on it...dad blamed round over bit bearing came flying off.......LOL.......
    Quote Originally Posted by gckless View Post
    A little Skar on it? Was it a B-stock bit?
    Refs:
    bought from Nitefury360, Tallic, SPLaudio X2
    Traded with Marleyskater420

  12. #27
    gckless's Avatar
    gckless is online now CarAudio.com Veteran

    Threadstarter


    Join Date
    Aug 2011
    Location
    San Antonio
    Posts
    4,251
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    1838 Post(s)

    Re: Ported vs. PR for my application

    Quote Originally Posted by mat3833 View Post
    what are the dimensions of that side?

    Matt
    Rear side? 40x16.75" ID if I shave the left and right sides.



    Quote Originally Posted by ducatipaso View Post
    15inch subs can't play fast beats, they take more power and that taxes the vehicles electrical system. You will wake up and "hear" then see the light at the end of the tunnel and it will be 3 10's pounding so hard you wont even open your trunk or turn your system on because you 15's will sound sloppy & weak.
    Quote Originally Posted by benbenondatrack View Post
    stfu lesbo.why are you worried about me so much? you must want to date me ya little cookie monster but i dont even like sweets. your just a cup full of ice, dirt dead nasty azz ice...without the water.

    Dat Build Log: http://mobileaudioforum.com/forum/showthread.php?2566-1999-Chevrolet-Blazer&highlight=1999+blazer

  13. #28
    mat3833's Avatar
    mat3833 is offline CarAudio.com Elite



    Join Date
    Mar 2008
    Location
    florida
    Posts
    1,060
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    227 Post(s)

    Re: Ported vs. PR for my application

    hmm, thats a tough one. you cant make ANY side at least 20 inchesX20 inches?

    Matt



    Star Mountain Nuthugger #5
    12" TC9 in 1.39 cubes @30hz
    Boston Acoustics GT-2300 @4 ohms bridged.

    Quote Originally Posted by double 07 View Post
    Sub cutout got a little skar on it...dad blamed round over bit bearing came flying off.......LOL.......
    Quote Originally Posted by gckless View Post
    A little Skar on it? Was it a B-stock bit?
    Refs:
    bought from Nitefury360, Tallic, SPLaudio X2
    Traded with Marleyskater420

  14. #29
    gckless's Avatar
    gckless is online now CarAudio.com Veteran

    Threadstarter


    Join Date
    Aug 2011
    Location
    San Antonio
    Posts
    4,251
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    1838 Post(s)

    Re: Ported vs. PR for my application

    Quote Originally Posted by mat3833 View Post
    hmm, thats a tough one. you cant make ANY side at least 20 inchesX20 inches?

    Matt
    Well the PR's will fit on the rear face, the dimensions I just listed. They have a 16.75 cutout diameter. When I said JUST fit before, I wasn't joking lol.



    Quote Originally Posted by ducatipaso View Post
    15inch subs can't play fast beats, they take more power and that taxes the vehicles electrical system. You will wake up and "hear" then see the light at the end of the tunnel and it will be 3 10's pounding so hard you wont even open your trunk or turn your system on because you 15's will sound sloppy & weak.
    Quote Originally Posted by benbenondatrack View Post
    stfu lesbo.why are you worried about me so much? you must want to date me ya little cookie monster but i dont even like sweets. your just a cup full of ice, dirt dead nasty azz ice...without the water.

    Dat Build Log: http://mobileaudioforum.com/forum/showthread.php?2566-1999-Chevrolet-Blazer&highlight=1999+blazer

  15. #30
    mat3833's Avatar
    mat3833 is offline CarAudio.com Elite



    Join Date
    Mar 2008
    Location
    florida
    Posts
    1,060
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    227 Post(s)

    Re: Ported vs. PR for my application

    wait, are you going to use the 18" PRs or 15" PRs?

    Matt



    Star Mountain Nuthugger #5
    12" TC9 in 1.39 cubes @30hz
    Boston Acoustics GT-2300 @4 ohms bridged.

    Quote Originally Posted by double 07 View Post
    Sub cutout got a little skar on it...dad blamed round over bit bearing came flying off.......LOL.......
    Quote Originally Posted by gckless View Post
    A little Skar on it? Was it a B-stock bit?
    Refs:
    bought from Nitefury360, Tallic, SPLaudio X2
    Traded with Marleyskater420

Closed Thread
Page 2 of 4 FirstFirst 1 2 3 4 LastLast

Similar Threads

  1. Sealed or ported, for my application?
    By GSRswapandslow in forum Enclosure Design & Construction Help
    Replies: 7
    Last Post: 10-19-2007, 11:19 PM
  2. SX vs. D2 for my application
    By niqnak in forum Subwoofers
    Replies: 7
    Last Post: 05-12-2004, 09:45 AM
  3. Pure SQ subs for my application?
    By Zylo in forum Subwoofers
    Replies: 31
    Last Post: 07-06-2003, 11:03 PM
  4. Better amp for my application?
    By Marc_01 in forum Amplifiers
    Replies: 7
    Last Post: 01-04-2003, 08:10 PM
  5. Please list good subs for my application
    By buster in forum Subwoofers
    Replies: 20
    Last Post: 12-24-2002, 09:05 AM

User Tag List

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may post attachments
  • You may edit your posts
1e2 Forum