Closed Thread
Results 1 to 15 of 15

Reload Thread: Hosed!!!!!

  1. #1
    soldiermedic's Avatar
    soldiermedic is offline Noob4Life



    Join Date
    Nov 2008
    Location
    Puyallup, Wa
    Posts
    253
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Hosed!!!!!

    Ok, I have been playing (tuning) with my stereo for the last month or so after getting things put together. I got what I thought was a "custom box" at 35hz from a guy I thought knew his stuff pretty well. The box sounds like @$$!. So, I need some help. I have run WinISD for an infinity Perfect DVQ 10" sub, and I get some odd numbers that I hope someone will quantify for me. In a sealed box, it's giving me .75-1 cf. In a vented, it's giving me some crazy-@$$ numbers. Either I'm using it wrong, or I'm using it wrong. Can someone help? I'll post the stats from the T&S if it helps.

    QTS:0.30 QMS:10.24
    Vas:37.65 Qes:.31
    Fs:25.13 SPL: 90
    re: 1.66 Pe:1600
    Le: 0.80. Bl: 11.55
    Xmax: 16.8 Dia: 267 mm
    Z: 4 Sd: 0.344 ft3

    For whatever reason, I get s screwy box size and an even screwier port size. I'm looking for 28-30hz tuning on it for SQL, unless someone suggests differently here.







  2. #2
    dbeez's Avatar
    dbeez is offline Supporting Vendor dbeez is a Supporting Member of the forum!

    dbeez is a Supporting Vendor of the forum!

    Join Date
    Nov 2008
    Location
    crestwood,ky
    Posts
    9,412
    Post Thanks / Like
    Mentioned
    80 Post(s)

    Re: Hosed!!!!!

    Hit up mike465 he knows his stuff..



    2002 suburban
    Security System Code alarm
    Electrical Dc power sp270 7 deka 9A31's and lots of 1/0
    Headunit pioneer 880prs
    Amps 2 Sax125.2 front stage crossfire xs8k@.5
    Wiring lots of 1/0 stinger, tsunami
    Mids & Tweeters 2 sets cdt m6+ mids 2 sets cdt tw25 tweets
    Subs 2-18" nightshade v2's d2
    System DetailsDaily driver.

  3. #3
    soldiermedic's Avatar
    soldiermedic is offline Noob4Life

    Threadstarter


    Join Date
    Nov 2008
    Location
    Puyallup, Wa
    Posts
    253
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Hosed!!!!!

    I guess I'll wait till later and see what the consensus is. I did pm that guy from earlier, so hopefully I'll get some help.




  4. #4
    Pl8er's Avatar
    Pl8er is offline Can you solve it?



    Join Date
    Dec 2001
    Location
    Columbus, OH
    Age
    33
    Posts
    4,891
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Hosed!!!!!

    I'm assuming a single sub here, but can you specify?



    NEVER buy from Dealer Cost Car Audio, ask me why

    Rainbow SLC+Tru 4.65 + RF 3sixty.2 = yum.
    Quote Originally Posted by IamDeMan View Post
    Draw away. It has already been proven with math that you are wrong. I believe math is > paint last time I checked.
    "5 midgets spanking a naked man covered in thousand island dressing, is this love too?"



    Quote Originally Posted by pitbull187 View Post
    FYI the blue wire was connected to something else. I know it was put in right b/c the guys at Circuit City put it in.
    "We never underestimate, the destructive power of change."

  5. #5
    Pl8er's Avatar
    Pl8er is offline Can you solve it?



    Join Date
    Dec 2001
    Location
    Columbus, OH
    Age
    33
    Posts
    4,891
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Hosed!!!!!

    Regardless of your answer....check your wiring. I know its a played out reply, but its usually a culprit. If you wired it wrong, your getting low output and it could sound bad. If you are running dual subs, you may have put one out of phase. Easily KILLS the output and sounds ******.
    Last edited by Pl8er; 04-18-2009 at 04:18 PM.



    NEVER buy from Dealer Cost Car Audio, ask me why

    Rainbow SLC+Tru 4.65 + RF 3sixty.2 = yum.
    Quote Originally Posted by IamDeMan View Post
    Draw away. It has already been proven with math that you are wrong. I believe math is > paint last time I checked.
    "5 midgets spanking a naked man covered in thousand island dressing, is this love too?"



    Quote Originally Posted by pitbull187 View Post
    FYI the blue wire was connected to something else. I know it was put in right b/c the guys at Circuit City put it in.
    "We never underestimate, the destructive power of change."

  6. #6
    soldiermedic's Avatar
    soldiermedic is offline Noob4Life

    Threadstarter


    Join Date
    Nov 2008
    Location
    Puyallup, Wa
    Posts
    253
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Hosed!!!!!

    It's a single 10, wiring is good by 2 sources double checking it for me. I just figured out the box dimensions, but now the port length is boggling me.




  7. #7
    dbeez's Avatar
    dbeez is offline Supporting Vendor dbeez is a Supporting Member of the forum!

    dbeez is a Supporting Vendor of the forum!

    Join Date
    Nov 2008
    Location
    crestwood,ky
    Posts
    9,412
    Post Thanks / Like
    Mentioned
    80 Post(s)

    Re: Hosed!!!!!

    Give us the current box info size the port info



    2002 suburban
    Security System Code alarm
    Electrical Dc power sp270 7 deka 9A31's and lots of 1/0
    Headunit pioneer 880prs
    Amps 2 Sax125.2 front stage crossfire xs8k@.5
    Wiring lots of 1/0 stinger, tsunami
    Mids & Tweeters 2 sets cdt m6+ mids 2 sets cdt tw25 tweets
    Subs 2-18" nightshade v2's d2
    System DetailsDaily driver.

  8. #8
    cj407's Avatar
    cj407 is offline Banned



    Join Date
    Jun 2008
    Location
    Orlando, FL
    Posts
    2,780
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Hosed!!!!!

    we would need the max dimensions you can have....to help you out.




  9. #9
    Pl8er's Avatar
    Pl8er is offline Can you solve it?



    Join Date
    Dec 2001
    Location
    Columbus, OH
    Age
    33
    Posts
    4,891
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Hosed!!!!!

    how much power to the amp, and how did you set your gains.

    I know I'm on a different area than everyone else, but we have some really excellent box experts here....so I might as well go with what I'm good with.

    If it's the box, they are going to figure it out....if it ends up being ok, at least we have started looking at the power and wiring.



    NEVER buy from Dealer Cost Car Audio, ask me why

    Rainbow SLC+Tru 4.65 + RF 3sixty.2 = yum.
    Quote Originally Posted by IamDeMan View Post
    Draw away. It has already been proven with math that you are wrong. I believe math is > paint last time I checked.
    "5 midgets spanking a naked man covered in thousand island dressing, is this love too?"



    Quote Originally Posted by pitbull187 View Post
    FYI the blue wire was connected to something else. I know it was put in right b/c the guys at Circuit City put it in.
    "We never underestimate, the destructive power of change."

  10. #10
    fshanda's Avatar
    fshanda is offline Slightly Stoopid



    Join Date
    Mar 2008
    Location
    MD
    Posts
    170
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Hosed!!!!!

    Xmax = 267mm

    Thats a lot of Xmas

    An RE XXX 18" is 54mm, my 15"Mojo is like 33

    Maybe a typo?



    My System:
    Alpine 9856 head unit
    Alpine SPS-17C2 6.5 coaxial front doors
    Polk Audio db 651 6.5 coaxial rear doors
    Alpine Type-R 10" D4 sub in custom ported enclosure
    Alpine MRD M605 amplifier

    Refs: Assman (purchase), PsychoTheRapist (purchase), wasted ink (trade)

  11. #11
    soldiermedic's Avatar
    soldiermedic is offline Noob4Life

    Threadstarter


    Join Date
    Nov 2008
    Location
    Puyallup, Wa
    Posts
    253
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Hosed!!!!!

    The Xmax is 16.75mm....what you read was the diameter

    It's running off of a RF T4002 bridged at 2 ohms. It does 512 mono at 4 ohms. Power was the first thing I checked, not an issue. then I checked the sub wiring as stated before.

    The speaker sits in the back of my trailblazer, so space is not really an issue for me, since it's a 10". I gave the current box back, it was a prefab box used for memphis speakers (some spider emblem on the connector ports). It's sitting in a sealed box for now till I get to the guy that made the box for me.

    Gains were set at half, then as I tuned, the best response I got was at 3/4...and it still sounded bad.

    Crossovers were controlled from the deck, got the best response at 160hz in the back with 125 in the components.




  12. #12
    soldiermedic's Avatar
    soldiermedic is offline Noob4Life

    Threadstarter


    Join Date
    Nov 2008
    Location
    Puyallup, Wa
    Posts
    253
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Hosed!!!!!

    I also am thinking I need it tuned higher, considering what I didn't hear from my sub with the other box. I don't need the low rumble, but I do want the higher range of midbass as it transfers to my comps. I am open to suggestions.

    I listen mainly to Gospel, Rock...and Enya.




  13. #13
    Pioneer~Saturn's Avatar
    Pioneer~Saturn is offline Dr. Enclosure



    Join Date
    Jul 2006
    Location
    Dayton, OH
    Age
    26
    Posts
    5,318
    Post Thanks / Like
    Images
    7
    Mentioned
    1 Post(s)

    Re: Hosed!!!!!

    Just measure the port opening and measure any other parts of the port inside and draw it out on a piece of paper and put some geometry to work and let us know the port length, port area, and net enternal volume.

    And from the sounds of things you may want to look into just a sealed enclosure..



    <First and only dual-alternator 'real' Saturn (pre 2002) on the planet>
    Team Concepts, Team Shok Industries Team XS Power
    Soon: Mystery subs + AQ20k
    12.75 cubes net ~25Hz tuning 200 sq inches of port (lowz?)
    AC position- 250 amp alt
    Stock alt position- 225 amp alt
    (2) XS Power D3100's
    4 power+ 4 ground runs of 1/0-gauge to rear
    152.1 @ 40Hz legal, certified...just getting started.

  14. #14
    Pl8er's Avatar
    Pl8er is offline Can you solve it?



    Join Date
    Dec 2001
    Location
    Columbus, OH
    Age
    33
    Posts
    4,891
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Hosed!!!!!

    Quote Originally Posted by Pioneer~Saturn View Post
    Just measure the port opening and measure any other parts of the port inside and draw it out on a piece of paper and put some geometry to work and let us know the port length, port area, and net enternal volume.

    And from the sounds of things you may want to look into just a sealed enclosure..

    Times 1,000,000! You are listening to very tight quick bass and a bit more classical. Ported is not the best option here. Sealed will be less output but more accurate.

    So it sounds as though you adjusted the gains by ear (which is totally fine) but do you have a DMM? If so, perhaps checking that. If you're wanting to run say 700watts at 2ohms just plug it into the formula and then check it against what the amp is doing. You could have a lower voltage output on the HU or even a messed up RCA.

    Sqrt(Power*Resistance) = Voltage
    Sqrt(700*2)=37.42

    I'm just assuming that you want to be at 700 rms. Also, does it sound better sealed?



    NEVER buy from Dealer Cost Car Audio, ask me why

    Rainbow SLC+Tru 4.65 + RF 3sixty.2 = yum.
    Quote Originally Posted by IamDeMan View Post
    Draw away. It has already been proven with math that you are wrong. I believe math is > paint last time I checked.
    "5 midgets spanking a naked man covered in thousand island dressing, is this love too?"



    Quote Originally Posted by pitbull187 View Post
    FYI the blue wire was connected to something else. I know it was put in right b/c the guys at Circuit City put it in.
    "We never underestimate, the destructive power of change."

  15. #15
    soldiermedic's Avatar
    soldiermedic is offline Noob4Life

    Threadstarter


    Join Date
    Nov 2008
    Location
    Puyallup, Wa
    Posts
    253
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Hosed!!!!!

    Quote Originally Posted by Pl8er View Post
    Times 1,000,000! You are listening to very tight quick bass and a bit more classical. Ported is not the best option here. Sealed will be less output but more accurate.

    So it sounds as though you adjusted the gains by ear (which is totally fine) but do you have a DMM? If so, perhaps checking that. If you're wanting to run say 700watts at 2ohms just plug it into the formula and then check it against what the amp is doing. You could have a lower voltage output on the HU or even a messed up RCA.

    Sqrt(Power*Resistance) = Voltage
    Sqrt(700*2)=37.42

    I'm just assuming that you want to be at 700 rms. Also, does it sound better sealed?
    To be honest, I would like a little more output even though it sounds better in the sealed box. However, I have come to understand that I can only have one or the other, unless I go with a different setup /subwoofer, or even increasing in size. THe thing is that it sits in the back of a trailblazer, so I know I'm getting some sound boost from that too. Any suggestions on all that? I'm running 400 RMS in the sub, 512+ from the amp at 2 ohms.




Closed Thread

Posting Permissions

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