dual powerport CSi40

eaadams
eaadams Posts: 213
edited February 2005 in Speakers
I see on the back of the CSi40 there are two powerports. What effect does this have on bass? Did the CS400i have dual powerports? What does the CSi5 have?
Post edited by eaadams on
· Share on FacebookShare on Twitter

Comments

  • del44
    del44 Posts: 686
    edited January 2005
    I have the 400i and it has only a single powerport.
    · Share on FacebookShare on Twitter
  • Mjr7531
    Mjr7531 Posts: 856
    edited January 2005
    However, two powerports as like on my CSi5 effectively double the pot cross area, keeping the actual port diameter down on both ports while reducing the possibilty of chuffing,
    Matt
    · Share on FacebookShare on Twitter
  • eaadams
    eaadams Posts: 213
    edited January 2005
    What is pot cross area?
    What does it mean to keep port diameter down?
    What is chuffing?
    · Share on FacebookShare on Twitter
  • eaadams
    eaadams Posts: 213
    edited February 2005
    chuffing

    A characteristic, low-frequency pulsating noise associated with the irregular burning of fuel in a rocket engine.
    · Share on FacebookShare on Twitter
  • VR3
    VR3 Posts: 28,775
    edited February 2005
    Chuffling is port noise basically, air created at the port...

    Port diameter down - make the diameter of the small smaller (width)...
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
    · Share on FacebookShare on Twitter
  • eaadams
    eaadams Posts: 213
    edited February 2005
    does a smaller diameter make it more punchy? Or is it just a reduction in port air flow noise?
    · Share on FacebookShare on Twitter
  • VR3
    VR3 Posts: 28,775
    edited February 2005
    Actually, the LARGER the port = less port noise, so I dont see why they would make the port small, the power port holes are only like 1-1.5" wide anyways...
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
    · Share on FacebookShare on Twitter
  • Mjr7531
    Mjr7531 Posts: 856
    edited February 2005
    Originally posted by eaadams
    What is pot cross area?
    I was tired that night, sorry
    I meant 'port'
    And larger diameter is great and all that crap, but the bigger the diameter, the longer the port tube, and you need to keep the port at least 3 inches from the opposite wall, so problems would be encountered if they widened the ports too much.
    · Share on FacebookShare on Twitter
  • EricH
    EricH Posts: 140
    edited February 2005
    Ports must be large enough to eliminate chuffing, but not so large as to throw off the tune of the speaker. Speaker designers balance port tube length, diameter, internal speaker volume etc. to tune the speaker. Two smaller ports do the exact same thing as one larger port.
    · Share on FacebookShare on Twitter