Closed Thread
Results 1 to 9 of 9

Reload Thread: weird loss of output at specific frequencies

  1. #1
    Beatin''s Avatar
    Beatin' is online now CarAudio.com Elite



    Join Date
    Nov 2012
    Location
    MI
    Posts
    985
    Post Thanks / Like
    Mentioned
    2 Post(s)

    weird loss of output at specific frequencies

    I have a pair of radio shack 15's (yeah lolol whatever...) in a sealed Atrend prefab enclosure, in side the trunk of my car.

    Even when the EQ is flat, no bass boost, etc, there are songs I listen to that have sine wave bass notes (southern rap music) that are no where near as loud as the real lows and highs. I see the waves on the oscilliscope in the windows media player and they are heavily amplified like other bass notes within the track. So this is not a case in which certain bass notes were recorded softer than others.

    If not that, then what may be the cause of this loss of SPL?







  2. #2
    ThatChevyGuy's Avatar
    ThatChevyGuy is offline i heart Jager



    Join Date
    Jul 2006
    Location
    Arkansas
    Posts
    12,289
    Post Thanks / Like
    Mentioned
    12 Post(s)

    Re: weird loss of output at specific frequencies

    It's the subs and the enclosure those subs will probably drop off pretty quick under 40 hz



    REFS:
    Squeak9798, Kumbos310w6, BigBangTheory, Jmanpc, MillzThaYungin, WLDock, -Leister-, ThomasG, J31Rob (and a few more I have forgotten)
    Quote Originally Posted by Spider Monkey View Post
    eat my asshole you insignificant bastard child of a retarded dingleberry cunt wrinkle fuck toy
    Quote Originally Posted by subzero View Post
    her pussy better be that nicest pussy you ever ever ever had. she better suck, swallow, jack off, eat ass and snatch, make sammiwich, do yard work and fix the vehicals while nude. Because a bitch like that is definately gonna cause alot of stress in your life, even thou she keeps your wallet and your balls drained.
    Quote Originally Posted by 05fronty View Post
    bitch you better swallow and not make a mess

  3. #3
    TaylorFade's Avatar
    TaylorFade is offline I fail.



    Join Date
    Dec 2009
    Location
    Baton Rouge, La.
    Posts
    2,859
    Post Thanks / Like
    Mentioned
    150 Post(s)

    Re: weird loss of output at specific frequencies

    Quote Originally Posted by ThatChevyGuy View Post
    It's the subs and the enclosure those subs will probably drop off pretty quick under 40 hz
    That was my first thought too, but he said "the real lows" and the highs. Like, there's a hole in the response other than the rolloff. Of course, I'm assuming his definition of real lows is like sub-35hz or so.

    I wonder if maybe the box is big enough to catch low end well, but impedance rise is killing him in the 40-50hz range? Or his cabin gain is working overtime down low. Or conversely, causing cancellation in whatever range he's lacking.



    Quote Originally Posted by eCrack View Post
    TaylorFail
    Quote Originally Posted by Suicide Bobb View Post
    Taylorfail, v.2
    Quote Originally Posted by Imtjnotu View Post
    tailorFail v.3
    Quote Originally Posted by brodeisel View Post
    TaylorFail v.4
    Quote Originally Posted by tat2bass View Post
    TaylorWin v.1?

  4. #4
    Chriszle's Avatar
    Chriszle is offline CarAudio.com Elite



    Join Date
    Jan 2011
    Location
    SD
    Posts
    1,718
    Post Thanks / Like
    Mentioned
    7 Post(s)

    Re: weird loss of output at specific frequencies

    I can think of two possible problems. The subs and the box.




  5. #5
    TaylorFade's Avatar
    TaylorFade is offline I fail.



    Join Date
    Dec 2009
    Location
    Baton Rouge, La.
    Posts
    2,859
    Post Thanks / Like
    Mentioned
    150 Post(s)

    Re: weird loss of output at specific frequencies

    Quote Originally Posted by Chriszle View Post
    I can think of two possible problems. The subs and the box.
    Those are the obvious ones though. Would be interesting to know (or think about) what's going on outside of those. Lol.



    Quote Originally Posted by eCrack View Post
    TaylorFail
    Quote Originally Posted by Suicide Bobb View Post
    Taylorfail, v.2
    Quote Originally Posted by Imtjnotu View Post
    tailorFail v.3
    Quote Originally Posted by brodeisel View Post
    TaylorFail v.4
    Quote Originally Posted by tat2bass View Post
    TaylorWin v.1?

  6. #6
    Beatin''s Avatar
    Beatin' is online now CarAudio.com Elite

    Threadstarter


    Join Date
    Nov 2012
    Location
    MI
    Posts
    985
    Post Thanks / Like
    Mentioned
    2 Post(s)

    Re: weird loss of output at specific frequencies

    Is there any other information I can give to help solve this problem?




  7. #7
    Chriszle's Avatar
    Chriszle is offline CarAudio.com Elite



    Join Date
    Jan 2011
    Location
    SD
    Posts
    1,718
    Post Thanks / Like
    Mentioned
    7 Post(s)

    Re: weird loss of output at specific frequencies

    You can check your crossover settings on amp and/or h/u. If they are set correctly, you should try moving your box in all sorts of configurations. Sealed boxes should have less low end roll off than ported, so you shouldn't be missing the lows.




  8. #8
    Beatin''s Avatar
    Beatin' is online now CarAudio.com Elite

    Threadstarter


    Join Date
    Nov 2012
    Location
    MI
    Posts
    985
    Post Thanks / Like
    Mentioned
    2 Post(s)

    Re: weird loss of output at specific frequencies

    the LPF on the amp is all the way up at 200hz and the HU is set at 160hz. But that's not the range in which loss occurs. The loss I'm experiencing is, I'm gessing, in between 50-80hz.

    I have the box sitting deep in the trunk facing backwards (ie: open the trunk, subs in your face). You think moving the box towards the trunk lid will help?




  9. #9
    av83's Avatar
    av83 is offline CarAudio.com Veteran



    Join Date
    Mar 2012
    Location
    Illinois
    Posts
    2,868
    Post Thanks / Like
    Mentioned
    50 Post(s)

    Re: weird loss of output at specific frequencies

    Quote Originally Posted by Beatin' View Post
    the LPF on the amp is all the way up at 200hz and the HU is set at 160hz. But that's not the range in which loss occurs. The loss I'm experiencing is, I'm gessing, in between 50-80hz.

    I have the box sitting deep in the trunk facing backwards (ie: open the trunk, subs in your face). You think moving the box towards the trunk lid will help?
    Leave the lpf on the amp up or off, and turn the lpf on your H/U down to 80, at the highest. You should be attempting to reproduce frequencies above 100 hz with your interior speakers.



    Pioneer 80prs
    ...
    Rockford Fosgate t800.4, CDT ES-MO 6 mids, Digital Designs T2 tweets
    ...
    2 MB Quart DSC1500.1's strapped on 1 Tantric HDD 12
    Mike Singer 310 amp 6 phase
    ...
    2 runs of Monster Cable 1/0

Closed Thread

Similar Threads

  1. lights dimming and loss of RPM's at idle ...... need suggestions please help
    By Big Rich in forum Wiring, Electrical and Installation Help
    Replies: 14
    Last Post: 03-27-2012, 09:50 PM
  2. Speaker sounding weird at low frequencies, please help!
    By stephens30228 in forum Subwoofers
    Replies: 8
    Last Post: 02-14-2012, 08:52 PM
  3. Upgraded wiring, loss of output?
    By SGSeeker in forum Wiring, Electrical and Installation Help
    Replies: 2
    Last Post: 06-29-2007, 01:41 PM
  4. sudden loss of sub output...dead amp? something else?
    By zachzchw in forum General Discussion
    Replies: 8
    Last Post: 04-04-2006, 08:08 PM
  5. Replies: 8
    Last Post: 01-10-2004, 10:47 PM

Posting Permissions

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