Plugging port holes

DannyD
DannyD Posts: 133
edited February 2008 in Subwoofer Hookup & Bass Management
This may be the dumb question of the day but I'm just curious. Has anyone every plugged the port hole in sub to achieve better bass and or sound or would that achieve the total opposite. Just wondering.
Fronts: RTI10's
Center: CSIA6
Rears: RTIA3's
Sub: 15" Velodyne DLS5000R x2 Stacked:D:D:D
Amp: Marantz MM-9000 150wpc (bi-amped for RTI10's) and CSIA6
Blu-Ray: PS3
Harman Kardon AVR247
Monster Cables
Signal Analog II IC's
Panamax MP-5300 Power Conditioner
Post edited by DannyD on
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Comments

  • ShinAce
    ShinAce Posts: 1,194
    edited January 2008
    It's cool, don't be ashamed.

    You can partially stuff a port with fiberglass insulation. You could stuff it fully with wool or polyfill until it's almost completely airtight. Worse case scenario, you end up with a sealed box. You can glue or staple some stretched out cloth to hold the stuffing material.

    Stuffing a port throws off all equations you might find online. It lowers the speed of sound in the port meaning corrections are needed.

    You can try it yourself. I warn you, you'll need to stuff it a lot to get a big difference. You can try balled up socks.
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  • treitz3
    treitz3 Posts: 19,029
    edited January 2008
    LOVE the thread title. Hard to keep my mind out of the gutter on that one. :D

    You may find that in your rooms acoustics it sounds better.....or worse. I have done that from time to time with subs and with various speakers with mixed results. IMO, there are just too many variables to consider when answering this question. YMMV.
    ~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~
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  • DannyD
    DannyD Posts: 133
    edited January 2008
    treitz3 wrote: »
    LOVE the thread title. Hard to keep my mind out of the gutter on that one. :D

    You may find that in your rooms acoustics it sounds better.....or worse. I have done that from time to time with subs and with various speakers with mixed results. IMO, there are just too many variables to consider when answering this question. YMMV.

    I didn't think about the thread title until you mentioned it. LMFAO!!
    Fronts: RTI10's
    Center: CSIA6
    Rears: RTIA3's
    Sub: 15" Velodyne DLS5000R x2 Stacked:D:D:D
    Amp: Marantz MM-9000 150wpc (bi-amped for RTI10's) and CSIA6
    Blu-Ray: PS3
    Harman Kardon AVR247
    Monster Cables
    Signal Analog II IC's
    Panamax MP-5300 Power Conditioner
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  • Monster Jam
    Monster Jam Posts: 919
    edited January 2008
    treitz3 wrote: »
    LOVE the thread title. Hard to keep my mind out of the gutter on that one. :D

    LOL Beat me to the punch on that one!
    Do you hear that buzzing noise? :confused:
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  • tonyb
    tonyb Posts: 32,963
    edited January 2008
    on A PSW10? I wouldn't plug the ports,play with placement.The 10 is not exactly a powerhouse of a sub.
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1420
    lsi 9's
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  • jakelm
    jakelm Posts: 4,081
    edited January 2008
    tonyb wrote: »
    on A PSW10? I wouldn't plug the ports,play with placement.The 10 is not exactly a powerhouse of a sub.

    Actually Polk didnt do a good job on the port of the PWS10 and didnt flare it at both ends. Terrible port noise. I know its not the best sub to begin with but I stuffed mine and was able to get higher output from the sub. There was just too much air rushing out of that little port. The driver and amp had alot more to give, but the port couldnt keep up. So I sealed it.
    Monitor 7b's front
    Monitor 4's surround
    Frankinpolk Center (2 mw6503's with peerless tweeter)
    M10's back surround
    Hafler-200 driving patio Daytons
    Tempest-X 15" DIY sub w/ Rythmik 350A plate amp
    Dayton 12" DVC w/ Rythmik 350a plate amp
    Harman/Kardon AVR-635
    Oppo 981hd
    Denon upconvert DVD player
    Jennings Research (vintage and rare)
    Mit RPTV WS-55513
    Tosh HD-XA1
    B&K AV5000


    Dont BAN me Bro!!!!:eek:
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  • mantis
    mantis Posts: 17,194
    edited January 2008
    Some companies give you port plugs. This helps "tune" the sub to the room. Trial and error applies here.

    Try man, can't hurt.
    Dan
    My personal quest is to save to world of bad audio, one thread at a time.
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  • wallstreet
    wallstreet Posts: 1,405
    edited January 2008
    I've got one port plugged on my 25-31. It still plays as loud as I need it, so I tuned it to 20HZ to get a tad more rumble.
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  • obieone
    obieone Posts: 5,077
    edited January 2008
    How would this effect a PSW303? It's classified as a 'long throw'?
    I refuse to argue with idiots, because people can't tell the DIFFERENCE!
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  • ShinAce
    ShinAce Posts: 1,194
    edited February 2008
    wallstreet wrote: »
    I've got one port plugged on my 25-31. It still plays as loud as I need it, so I tuned it to 20HZ to get a tad more rumble.

    Just wanted to second this notion. Plugging one of many ports will actually lower the tuning frequency, but all that air has to move through less port(noise).

    My sub(home built) uses dual 3" ports that are 13" long. It's already tuned to 28Hz and has a -3dB of 27Hz, so plugging one would tune it far too low(22Hz) for my needs. This sub is for music, in case you're wondering.
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