Free Shipping on All Orders 1-866-764-1801

Vist our Online Store
+ Reply to Thread
Results 1 to 17 of 17

Thread: EQ problems...

  1. #1

    Member Sales Rating: (0)

    Join Date
    Mar 2007
    Location
    Charleston, WV
    Posts
    565

    Default EQ problems...

    I'm havin trouble gettin my EQ set properly in. I have an Alpine CDA-9831 deck. My settings are:

    Band 1: 60 Hz, 5 dB, 1 width
    Band 2: 150 Hz, 7 dB, 1 width
    Band 3: 4 K, 12 dB, 1 width
    Band 4: 12.5 K, 12 dB 1 width

    My HPF and LPF are all put on 80 Hz and my time correction is:

    Front L: 1.1rms
    Front R: 0.1rms
    Rear L: 0.7
    Rear R: 0

    It sounds great but only certain rap songs the treble will sound like "shhh!!!!!" from the tweets at relatively loud levels.

    Oh my gear is Boston Acoustics Pro60 components up front, Polk Audio db690 6x9 in the back along with Boston Acoustics S45 4" right beside the Polk's. My sub is a Boston Acoustics SPG555. My fronts and rears are ran off an Alpine PDX-4.400 and my sub is ran off an Alpine PDX-1.1000. To me sometimes certain rap songs have that craklin sound. Can somebody tell me what I'm doing wrong here?

  2. #2

    Member Sales Rating: (1)

    Join Date
    Jun 2002
    Posts
    3,860

    Default

    If everything else sounds great aside from certain rap songs my guess would be the rap songs are recorded poorly. This is assuming you're using CDs you bought and not MP3s from an ipod or on a CD you burned. In that case I'd point the finger at the mp3 being ripped poorly.
    SDA 2B
    Carver m0.5t
    AMC pre
    Cobalt Cables

  3. #3

    Member Sales Rating: (1)

    Join Date
    Mar 2004
    Location
    College Station, TX
    Posts
    7,174

    Default

    Why do you have everything up? If you have 60Hz at +5dB...and thats your lowest increase, decrease everything by 5dB.
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it

  4. #4

    Member Sales Rating: (0)

    Join Date
    Mar 2007
    Location
    Charleston, WV
    Posts
    565

    Default

    Quote Originally Posted by exalted512 View Post
    Why do you have everything up? If you have 60Hz at +5dB...and thats your lowest increase, decrease everything by 5dB.
    -Cody
    I did that and it got overall not nearly as loud as before. I'm really a terrible tweaker but I'm trying.

  5. #5

    Member Sales Rating: (0)

    Join Date
    Jul 2001
    Location
    MD
    Posts
    678

    Default

    Quote Originally Posted by JoshParsons84 View Post
    I'm havin trouble gettin my EQ set properly in. I have an Alpine CDA-9831 deck. My settings are:

    Band 1: 60 Hz, 5 dB, 1 width
    Band 2: 150 Hz, 7 dB, 1 width
    Band 3: 4 K, 12 dB, 1 width
    Band 4: 12.5 K, 12 dB 1 width

    My HPF and LPF are all put on 80 Hz and my time correction is:

    Front L: 1.1rms
    Front R: 0.1rms
    Rear L: 0.7
    Rear R: 0

    It sounds great but only certain rap songs the treble will sound like "shhh!!!!!" from the tweets at relatively loud levels.

    Oh my gear is Boston Acoustics Pro60 components up front, Polk Audio db690 6x9 in the back along with Boston Acoustics S45 4" right beside the Polk's. My sub is a Boston Acoustics SPG555. My fronts and rears are ran off an Alpine PDX-4.400 and my sub is ran off an Alpine PDX-1.1000. To me sometimes certain rap songs have that craklin sound. Can somebody tell me what I'm doing wrong here?

    12db of boost??? That's the problem. Back those down and the bad noises should stop. It might not be as loud, but you won't damage your equipment. ;)

  6. #6

    Member Sales Rating: (0)

    Join Date
    Dec 2003
    Location
    Chattanooga, TN
    Posts
    11,825

    Default

    Amen! Thats the reason right there! If you need 12 db of boost, you either need your hearing checked or a bigger amp. 4 KHz and 12 KHz are ear splitters and forcing your amp to quadruple its power at those frequencies is pulling power away from the other frequencies and hence the hammered **** sound quality. A good rule of thumb is A) cut rather than boost and B) never boost more than 3 db.

    Start with everything down and turn up each band til it sounds right.

    Also, try some different frequency centers.

    60 is fine but Id move the 2nd band up to 250 Hz. 200-315 is where a lot of cars have some resonance. 800-1000 is also a problem area most of the time. Center a band on 800 and tinker with it. Id also move the 3rd band up to 5 K. That way it would cover 3.2-8 better and this is a whole "grouping" of sound. Id also move the 5th band up to 16 K. Just about every car Ive ever seen on an RTA starts rolling off sharply at 12 and takes a nose dive at 20.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D

  7. #7

    Member Sales Rating: (0)

    Join Date
    Mar 2007
    Location
    Charleston, WV
    Posts
    565

    Default

    OK thanx for the info. I'll go try that right now, what about the Time Correction? Is it something that u must do when tweakin everything else? Or does it take away from SQ? Lemme know something. This is my very first system in my own car. I love the sound I got, but I can already tell I wont keep it forever.

  8. #8

    Member Sales Rating: (0)

    Join Date
    Dec 2003
    Location
    Chattanooga, TN
    Posts
    11,825

    Default

    Time alignment can effect phase which can cause some changes in tonality. Its best to set the time alignment first, then EQ then go back and fine tune the time alignment.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D

  9. #9

    Member Sales Rating: (0)

    Join Date
    Jul 2007
    Posts
    124

    Default

    Quote Originally Posted by MacLeod View Post
    Time alignment can effect phase which can cause some changes in tonality. Its best to set the time alignment first, then EQ then go back and fine tune the time alignment.
    Then fine tune EQ.

    More than likely it's not going to be an overnight thing. Be patient and keep trying.
    HU: 880PRS
    Front: SR6500
    Amp: Alpine MRV-F545
    Sub: SR124-DVC
    Amp: Alpine MRD-M1005

  10. #10

    Member Sales Rating: (0)

    Join Date
    Mar 2007
    Location
    Charleston, WV
    Posts
    565

    Default

    It would be a lot easier if I had some sort of guide to turn to. Like tellin me about the width and the dB settings and all that good stuff. I'm gonna look and see what I can find.

  11. #11

    Member Sales Rating: (0)

    Join Date
    Dec 2003
    Location
    Chattanooga, TN
    Posts
    11,825

    Default

    No such thing as a guide and itll take a long time. Youll get it to where you think it sounds good, listen to it for a while then hear something you dont like. Work it out, think it sounds good, listen to it for a while then hear something else you dont like.....and on and on.

    The best thing you can do is to do a lot of listening to good home audio systems. Also go find some SQ competitions. MECA has several in your area. Find a couple and go listen to some of the SQ systems. 90% of the guys out there are only too happy to demo their systems. The only way to learn what sounds best is to do a whole lot of listening. Im in my 3rd year of competing and am JUST NOW figuring out what goes where and such.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D

  12. #12

    Member Sales Rating: (1)

    Join Date
    Mar 2004
    Location
    somewhere in Canada
    Posts
    530

    Default

    Quote Originally Posted by JoshParsons84 View Post
    I'm havin trouble gettin my EQ set properly in. I have an Alpine CDA-9831 deck. My settings are:

    Band 1: 60 Hz, 5 dB, 1 width
    Band 2: 150 Hz, 7 dB, 1 width
    Band 3: 4 K, 12 dB, 1 width
    Band 4: 12.5 K, 12 dB 1 width

    My HPF and LPF are all put on 80 Hz and my time correction is:

    Front L: 1.1rms
    Front R: 0.1rms
    Rear L: 0.7
    Rear R: 0

    It sounds great but only certain rap songs the treble will sound like "shhh!!!!!" from the tweets at relatively loud levels.

    Oh my gear is Boston Acoustics Pro60 components up front, Polk Audio db690 6x9 in the back along with Boston Acoustics S45 4" right beside the Polk's. My sub is a Boston Acoustics SPG555. My fronts and rears are ran off an Alpine PDX-4.400 and my sub is ran off an Alpine PDX-1.1000. To me sometimes certain rap songs have that craklin sound. Can somebody tell me what I'm doing wrong here?
    http://www.dak.com/reviews/Tutorial_frequencies.cfm

    http://www.ethanwiner.com/equalizers.html


    A couple of sites that will help you get the most out of your EQs.



    I'll echo what has been said earlier- you don't want huge amounts of boost or cuts in order to "get things right." I suspect part of the problem stems from the fact you've got too much going on in terms of equipment playing in the vehicle. Start with just your front speakers (Boston Acoustics Pro60 components) and your sub playing, and tune best you can. If you then decide you can't go without rear fill, start tuning your 6X9s. 4" speakers are redundant, especially beside 6X9s when you have a competent front stage that's up to the task without interferance from the rears. In car audio, less truly is more, especially when it comes to other speaker locations interfering with the imaging cues and sound quality of your front stage. Just because a vehicle manufacturer might design an "upgraded" factory system that uses 15 drivers doesn't make it a good idea ;).
    Last edited by Greg Peters; 08-13-2008 at 07:34 PM.
    -------------------------------------------------------

  13. #13

    Member Sales Rating: (1)

    Join Date
    Aug 2006
    Posts
    388

    Default

    Quote Originally Posted by MacLeod View Post
    Amen! Thats the reason right there! If you need 12 db of boost, you either need your hearing checked or a bigger amp. 4 KHz and 12 KHz are ear splitters and forcing your amp to quadruple its power at those frequencies is pulling power away from the other frequencies and hence the hammered **** sound quality. A good rule of thumb is A) cut rather than boost and B) never boost more than 3 db.

    Start with everything down and turn up each band til it sounds right.

    Also, try some different frequency centers.

    60 is fine but Id move the 2nd band up to 250 Hz. 200-315 is where a lot of cars have some resonance. 800-1000 is also a problem area most of the time. Center a band on 800 and tinker with it. Id also move the 3rd band up to 5 K. That way it would cover 3.2-8 better and this is a whole "grouping" of sound. Id also move the 5th band up to 16 K. Just about every car Ive ever seen on an RTA starts rolling off sharply at 12 and takes a nose dive at 20.
    i agree, 3db max. cutting is the better choice.
    kenwood excelon kdc-x991 h.u.
    Rockford Fosgate 360.3 DSP
    Rockford Fosgate POWER1000 running entire system
    Image Dynamics IDQ12 Sub
    Morel Elate 6 front stage

  14. #14

    Member Sales Rating: (0)

    Join Date
    Jul 2007
    Posts
    124

    Default

    I have 3 tuning sheets with something similar to one of the links that helps me a lot. I find them more useful than the chart you see on the link.

    I scanned them to my computer but I'm having a hard time converting them to upload. If you would like to have them send me a pm with your email address.
    HU: 880PRS
    Front: SR6500
    Amp: Alpine MRV-F545
    Sub: SR124-DVC
    Amp: Alpine MRD-M1005

  15. #15

    Member Sales Rating: (0)

    Join Date
    Mar 2007
    Location
    Charleston, WV
    Posts
    565

    Default

    Still studyin the sheets dirthog thanx BTW! I've got a dumb question: is there any way for me to distribute different wattage to each channel of my 4-channel amp? I.E. 100 watts goin to my fronts and like 50-75 goin to backs.

  16. #16

    Member Sales Rating: (0)

    Join Date
    Dec 2003
    Location
    Chattanooga, TN
    Posts
    11,825

    Default

    Kinda. Adjusting the front and rear gains so that they blend in better will accomplish the same thing basically.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D

  17. #17

    Member Sales Rating: (0)

    Join Date
    Jul 2007
    Posts
    124

    Default

    Hey joshparsons, are those sheets helping at all?
    HU: 880PRS
    Front: SR6500
    Amp: Alpine MRV-F545
    Sub: SR124-DVC
    Amp: Alpine MRD-M1005

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

     

Similar Threads

  1. PS3 Problems
    By dane_peterson in forum Video Games
    Replies: 10
    Last Post: 03-14-2007, 09:41 PM
  2. Amp problems
    By tommyboy in forum Electronics
    Replies: 2
    Last Post: 11-25-2006, 12:52 PM
  3. e-bay Problems.
    By MSALLA in forum The Clubhouse
    Replies: 10
    Last Post: 10-24-2006, 12:06 PM
  4. yet more problems...
    By sntnsupermen131 in forum Car Audio & Electronics
    Replies: 7
    Last Post: 07-24-2003, 11:22 PM
  5. 7B problems- please help
    By Mproost in forum Troubleshooting
    Replies: 8
    Last Post: 03-19-2003, 06:35 PM

Posting Permissions

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