Port noise

Willow
Willow Posts: 11,056
edited January 2005 in Speakers
What is this...how does it happen and what to listen for to know if you have it or not ?
Post edited by Willow on
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Comments

  • gatemplin
    gatemplin Posts: 1,595
    edited January 2005
    Port noise is also called chuffing or whistling. It happens when the mass of air moving in and out of the port is too high for the diameter of the port. Velocity increases to the point where the friction between the air and port is audible. It is very obvious on some subs. It is a whoosing noise that is very annoying and usually occurs near the tuning frequency where the vent is producing most of the output.

    Why do you want to know?
    Graham
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  • Willow
    Willow Posts: 11,056
    edited January 2005
    thanks...someone mentioned that the 202 had some of the worse port noise...I have the 202 and never heard a darn thing..
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  • Toxis
    Toxis Posts: 5,116
    edited January 2005
    the PSW10 has horrible port noise, but I've only got the 202 to do it once or twice.
    Never kick a fresh **** on a hot day.

    Home Setup: Sony VPL-VW85 Projo, 92" Stewart Firehawk, Pioneer Elite SC-65, PS3, RTi12 fronts, CSi5, FXi6 rears, RTi6 surround backs, RTi4 height, MFW-15 Subwoofer.

    Car Setup: OEM Radio, RF 360.2v2, Polk SR6500 quad amped off 4 Xtant 1.1 100w mono amps, Xtant 6.1 to run an eD 13av.2, all Stinger wiring and Raammat deadener.
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  • PolkThug
    PolkThug Posts: 7,532
    edited January 2005
    You may not hear port noise while watching an average movie. If you really want to reveal it, just make a CD with bass tones on it.

    However, Willow, if you haven't heard it, don't try to hear it.

    Regards,
    PolkThug
    Never Forget
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  • John K.
    John K. Posts: 822
    edited January 2005
    Willow, as you see, some have portnoise complaint and others don't.
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  • Whadyasay
    Whadyasay Posts: 300
    edited January 2005
    Just make sure to take it easy on the beans.



    Sorry, couldn't resist.
    Polk LSi9 Mains, Polk LSIC Center, Polk RT25i Surrounds, Polk M3II Rear Surround, SVS PB10-ISD Sub, Denon AVR 2809 (as digital pre/pro only), Sony BDP-S350, Oppo DV-981HD, Cambridge Audio Azur 540C (CD), Marantz MM9000 5-ch amp, Outlaw ICBM, Panasonic th-42PX85u HDTV, Behringer BFD Pro, Monster Power HTS 2600 Conditioner
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