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  1. #1

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    Question - How to improve subwoofer sound? -

    I have tried changing IC, power cables, splitter, isolation pads. Can you guys suggest some?

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    Improving your sub is a matter of getting the flattest frequency response possible in your room. Bass waves are so long that they refect back on themselves...many times causing cancellation in your seating position. Best thing to do is find out what you're getting. You need a SPL meter and some test tones, then graph out a frequency response. When you know what's what you can play with placement, phase, etc to improve things somewhat. Ultimately, you might want to go further with treatments and EQ...up to you.

    You can download REW (Room EQ Wizard) over at Home Theater Shack along with the tutorial to get you started.

    Combo rig:

    Onkyo NR1007 pre-pro, Carver TFM 45(fronts), Carver TFM 35 (surrounds)
    SDA 1C, CS400i, SDA 2B
    PB13Ultra RO
    BW Silvers
    Oppo BDP-83SE

  3. #3

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    learnt this from mike/mcloki:

    put your sub on your seat/listening position, play some bassy music. walk/crawl around and find where bass sounds best. put your sub there...

    also audyssey room correction helps tame peaks...
    my 7.(1x4) HT setup
    TV - Mitsubishi WD-65734
    AVP / Amp - Onkyo PR-SC885P / D-Sonic 2500-7
    Front - Emerald Physics CS2
    Center - JTR Triple 12LF
    Surround L/R / Back - Polk RTi4 / Polk FXi A4
    Sub - 4 X Hsu ULS15 playing nearfield
    DVD / CDP - Sony PS3/40GB / Sony SCD-XA9000ES
    Belkin PURE AV PF60 / UPS
    Buttkicker

    http://www.polkaudio.com/forums/showthread.php?t=60612

  4. #4

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    Sub EQ perhaps, SMS-1 or Behringer.
    Shoot the jumper.....................BALLIN.............!!!! !

    Home Theater Pics in the Showcase

    http://www.polkaudio.com/forums/show...p?userid=73580

  5. #5

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    Quote Originally Posted by MKZ View Post
    I have tried changing IC, power cables, splitter, isolation pads. Can you guys suggest some?
    What problems are you having with your subwoofer sound?

  6. #6

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    What kind of sub, how large of a room, how is it conencted, what is it not doing that you wish it would?
    Last edited by McLoki; 07-02-2008 at 09:50 PM.
    Mains.............Polk LSi15 (Cherry)
    Center............Polk LSiC (Crossover upgraded)
    Surrounds.......Polk LSi7 (Gloss Black - wood sides removed and crossovers upgraded)
    Subwoofers.....SVS 25-31 CS+ and PC+ (both 20hz tune)
    Pre\Pro...........NAD T163 (Modded with LM4562 opamps)
    Amplifier.........Cinepro 3k6 (6-channel, 500wpc@4ohms)

  7. #7

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    Quote Originally Posted by SlowcarIX View Post
    learnt this from mike/mcloki:

    put your sub on your seat/listening position, play some bassy music. walk/crawl around and find where bass sounds best. put your sub there...
    What he / I said... :p

    Michael
    Mains.............Polk LSi15 (Cherry)
    Center............Polk LSiC (Crossover upgraded)
    Surrounds.......Polk LSi7 (Gloss Black - wood sides removed and crossovers upgraded)
    Subwoofers.....SVS 25-31 CS+ and PC+ (both 20hz tune)
    Pre\Pro...........NAD T163 (Modded with LM4562 opamps)
    Amplifier.........Cinepro 3k6 (6-channel, 500wpc@4ohms)

  8. #8

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    Quote Originally Posted by Ron Temple View Post
    Improving your sub is a matter of getting the flattest frequency response possible in your room. Bass waves are so long that they refect back on themselves...many times causing cancellation in your seating position. Best thing to do is find out what you're getting. You need a SPL meter and some test tones, then graph out a frequency response. When you know what's what you can play with placement, phase, etc to improve things somewhat. Ultimately, you might want to go further with treatments and EQ...up to you.

    You can download REW (Room EQ Wizard) over at Home Theater Shack along with the tutorial to get you started.
    I tried, 40Hz seems to be a little high on my sub.

    Quote Originally Posted by SlowcarIX View Post
    learnt this from mike/mcloki:

    put your sub on your seat/listening position, play some bassy music. walk/crawl around and find where bass sounds best. put your sub there...

    also audyssey room correction helps tame peaks...
    I have limited space :(
    The placement might be some issue because I got the best bass in my bathroom which is not far from sub. I think the bass trapped there and I can even feel it on my toilet seat.

    Quote Originally Posted by Sherardp View Post
    Sub EQ perhaps, SMS-1 or Behringer.
    Yes, I wanna try it last.
    My sub has some EQ build in but I have no idea how to use it.

    Quote Originally Posted by Ern Dog View Post
    What problems are you having with your subwoofer sound?
    I have no problem with it but I just want to improve the sub like changing speaker cables and ICs.

    Quote Originally Posted by McLoki View Post
    What kind of sub, how large of a room, how is it conencted, what is it not doing that you wish it would?
    It is SVS SB12-Plus and my room is around 20x20x9 with full of junks. I connected with 12ft of Signal Subwoofer cable with AudioQuest splitter, powered with PS Audio Prelude and it is sitting on Isolation pads. There is nothing wrong. I just want to improve the sound.

    I got more gain with the splitter but less gain with the pads. There is not much improvement on changing the Sub cable and power cable.
    Last edited by MKZ; 07-03-2008 at 08:54 AM.

  9. #9

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    Have you trapped the corners yet?
    2 Channel -
    Martin Logan Spire, 2 JL Audio F112 subs
    McIntosh C1000 Controller with Tube pre amp, 2 MC501 amplifiers, MD1K Transport & DAC, MR-88 Tuner
    WireWorld Eclipse 6.0 speaker wire and jumpers, Eclipse 5^2 Squared Balanced IC's. Silver Eclipse PCs (5)
    Symposium Rollerblocks 2+ (16)Black Diamond Racing Mk 3 pits (8)

  10. #10

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    Quote Originally Posted by Hawkeye View Post
    Have you trapped the corners yet?
    I wished I could.

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    Since your sub has an EQ built in then learn how to use it. That should improve things. Call SVS or read your owners manual.

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    Quote Originally Posted by Ron Temple View Post
    Improving your sub is a matter of getting the flattest frequency response possible in your room. Bass waves are so long that they refect back on themselves...many times causing cancellation in your seating position. Best thing to do is find out what you're getting. You need a SPL meter and some test tones, then graph out a frequency response. When you know what's what you can play with placement, phase, etc to improve things somewhat. Ultimately, you might want to go further with treatments and EQ...up to you.

    You can download REW (Room EQ Wizard) over at Home Theater Shack along with the tutorial to get you started.
    +10. Everything you need to know is above ^

  13. #13

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    After I got the graph how can I fix it to get flat w/o equalizer? Any other tips and tricks you want to share?

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    Analyze your graph, see where your peaks and valleys are and mess with level, cros-over freq, and phase until you get the smoothest/flatest transition.

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    I did my hw and tried my best. It doesn't effect much on graph but I got more inaudible vibrates. PEQ users please share your setting.
    Here is mine:


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    Did you change the power cord on the svs?
    My HT set-up Panasonic front proj, 120 in ws screen, ATI amp,Integra 9.8 pre-pro, 2 Polk rti150, cp 1000, 4 fx 1000, Pioneer blu-ray 2 SVS sub pb 12-ultra 2, & Paragon popcorn popper. ps 3 Coaster leather HT recliners.

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    Yes.

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    You've got room correction bypassed. Set it to large, medium or small and run a graph for each setting. Your best response will probably be on the large setting, but each room is different. If you still have a peak at 40hz, then you can cut it with the PEQ. It looks like you have it engaged in the picture. How's that working?

    Combo rig:

    Onkyo NR1007 pre-pro, Carver TFM 45(fronts), Carver TFM 35 (surrounds)
    SDA 1C, CS400i, SDA 2B
    PB13Ultra RO
    BW Silvers
    Oppo BDP-83SE

  19. #19

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    I placed the woofer along the wall so I thought bypass would be the best. I'll play the room setting as you suggest anyway. Yes, PEQ helps abit on 40Hz but not completely flat out.

  20. #20

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    where is the sub located in reference to the front speakers........
    " He who dies with the most equipment wins Right ? "

    Denon 3300 [COLOR="Blue"]Adcom 535 BBe w/sub out 1 pr 4.6s 2 pr of 4 jrs Recent additions Samsung Lns-4095D LCD, Samsung hd-960 DVD, Monster HT-5000 Power center
    ,HPSA-1000 18" sealed DiY home sub.:D
    Black Laquer 1.2tl's w/ upgraded x-overs and Tweets BI-Amped with 2 Carver tfm-35's Knukonceptz 10ga cables

  21. #21

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    3, 4ft away from left speaker. There is hall way between them.

  22. #22

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  23. #23

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    That doily ain't helping things either. :D

  24. #24

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    Quote Originally Posted by Polkitup2 View Post
    That doily ain't helping things either. :D
    Maybe its there to attract the cat to sit on top as a dampener?:p

    H9: If you don't trust what you are hearing, then maybe you need to be less invested in a hobby which all the pleasure comes from listening to music.

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