Closed Thread
Results 1 to 9 of 9

Reload Thread: slot ports vs. aero ports.

  1. #1
    valin's Avatar
    valin is offline The King of the North



    Join Date
    May 2006
    Location
    Sudbury, Ontario
    Posts
    235
    Post Thanks / Like
    Mentioned
    0 Post(s)

    slot ports vs. aero ports.

    I have been doing some searching and was considering going with some aeroports in my new setup, which is two loaded BTL 18's off of two Memphis Mojo mc-2000d's in 12.5 cubes total airspace before displacement.

    I have read so many contradicting things about aeroports that I am forced to ask some questions.

    Is it true that with aeroports you need 1/2 the port area as a slot port to be just as efficient? ie. 200 sq. inches of slot = 100 sq. inches of aeroport?

    If this is so, I am going to either run three 6" aero's, at 11" long for 33Hz, or two 8" aero's at 15" long for 33Hz.

    Where can I purchase 6" or 8" aeroports?



    "Obsession is the word the lazy use to describe the dedicated."

    2008 Toyota Tundra DC 4x4


    HU: Pioneer AVH-P6800DVD
    Front Stage: PG RSD 6.5" comps, 5.25" comps, 3.5" coaxials
    Front Stage Amp: Memphis MC-3004
    Subs: Two DD 9515f's in 8.5 cubes @ 38hz
    Sub Amp: Memphis Mojo 4Kw




  2. #2
    Lakota's Avatar
    Lakota is offline Doesn't Know $hit



    Join Date
    Feb 2005
    Location
    Louisville, KY
    Age
    26
    Posts
    6,222
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: slot ports vs. aero ports.

    www.psp-inc.com makes 6" aero's, but I don't believe that any companies make 8" aero's as of now. Those with 8" aero's probably had to make them themselves.

    Yes, you can get away with less port area, I'm running 3 4" aero's on my 15.




    Ben Hemp
    1992 GMC Sonoma Ext Cab NEW BUILD
    2008 MECA S1 KY State Champion, 151.0 dB
    2008 MECA S1 WorldChampion, 151.8 dB
    2010 MECA scores: 150.9 dB S2, 151.6 dB S3
    Refs: smd4life, Subst4nce, wccoug21, dacheatham, thegreatestpenn, jshak07

  3. #3
    valin's Avatar
    valin is offline The King of the North

    Threadstarter


    Join Date
    May 2006
    Location
    Sudbury, Ontario
    Posts
    235
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: slot ports vs. aero ports.

    bump about the ratio of port area of an aero vs. that of a slot.



    "Obsession is the word the lazy use to describe the dedicated."

    2008 Toyota Tundra DC 4x4


    HU: Pioneer AVH-P6800DVD
    Front Stage: PG RSD 6.5" comps, 5.25" comps, 3.5" coaxials
    Front Stage Amp: Memphis MC-3004
    Subs: Two DD 9515f's in 8.5 cubes @ 38hz
    Sub Amp: Memphis Mojo 4Kw

  4. #4
    Lakota's Avatar
    Lakota is offline Doesn't Know $hit



    Join Date
    Feb 2005
    Location
    Louisville, KY
    Age
    26
    Posts
    6,222
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: slot ports vs. aero ports.

    Quote Originally Posted by valin View Post
    bump about the ratio of port area of an aero vs. that of a slot.
    Your original plans should work fine, but another 6" would probably be better.




    Ben Hemp
    1992 GMC Sonoma Ext Cab NEW BUILD
    2008 MECA S1 KY State Champion, 151.0 dB
    2008 MECA S1 WorldChampion, 151.8 dB
    2010 MECA scores: 150.9 dB S2, 151.6 dB S3
    Refs: smd4life, Subst4nce, wccoug21, dacheatham, thegreatestpenn, jshak07

  5. #5
    jake the ssnake's Avatar
    jake the ssnake is offline Junior Member



    Join Date
    Oct 2007
    Location
    Iowa
    Posts
    24
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: slot ports vs. aero ports.

    Quote Originally Posted by valin View Post
    bump about the ratio of port area of an aero vs. that of a slot.
    I'm interested in this also. I just recently heard that they are around 50-60% more efficient than slot ports. I would like to get some more input on this or test results.




  6. #6
    IgnoreMe's Avatar
    IgnoreMe is offline I love 2 girls 1 cup



    Join Date
    Dec 2003
    Location
    caraudio.com
    Age
    28
    Posts
    11,768
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: slot ports vs. aero ports.

    use the search button and search for

    "aero port area"

    you will find what you need.



    llllllllllllllll Educate yourself and help stop the ignorance.
    llllllllllllllll DEA Judge Francis L Young says...
    llllllllllllllll Designing a Ported Box


    refs: hazardous0388, snoopdan, karleon, thelow, freezeman_7, imtjnotu, Gebrochen, astroladespl, billabongcr , mustbenu , thunder9500 , 91ser, djdilliodon (6 times), stupify, milenko515, Zeuslicious, Bmoorman05, WaTTsLOk187, too dope 1904, nate2587, rbiele126, denalilvr



    Don't Blame Me. I Voted for Ron Paul.

    BluePoint Air Ratchet for sale...click me bitch

  7. #7
    newusername's Avatar
    newusername is offline CarAudio.com Veteran



    Join Date
    Jul 2005
    Location
    dg
    Posts
    3,725
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: slot ports vs. aero ports.

    The amount you cut down velocity will depend on the mouth radius, throat radius, and flare radius. 50-60% is not at all an unreasonable assumption.

    I did some of the math on flared ports here:

    http://www.soundsolutionsaudio.com/f...showtopic=7546

    You can see that in the example I listed in that post, velocity at the mouth was decreased by approximately 56%.




  8. #8
    J31Rob's Avatar
    J31Rob is offline CarTune Netwerk



    Join Date
    Nov 2006
    Location
    Indiana
    Posts
    11,246
    Post Thanks / Like
    Mentioned
    4 Post(s)

    Re: slot ports vs. aero ports.

    Is it true that aero's are more "peaky"..?



    the FUNK / facebook.com/The.Funk.765
    CarTune Netwerk / facebook.com/cartune.netwerk0

    Alpine / Sundown Audio / Sound Solutions Audio
    Audio Technix / CT Sounds / Execution Audio



  9. #9
    newusername's Avatar
    newusername is offline CarAudio.com Veteran



    Join Date
    Jul 2005
    Location
    dg
    Posts
    3,725
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: slot ports vs. aero ports.

    It is possible. The reason a flared port works in the first place is because the flare causes the air in the boundary layer (air close to the walls of the port) to expand and loose speed in a controlled manner, the amount of expansion obviously depending on the various radiuses I listed above.

    The problem is that the flare effect is most predominant on the boundary layer and has little to no effect on the air in the center of the port. As the velocity increases, this air becomes increasingly turbulent (for a given diameter port) and the flare does nothing to help this. This is port compression at it's finest, where there is a little loss of output and the helmholtz resonator shifts in frequency (the tuning frequency of the port changes).

    For a given port diameter and throat velocity, you will encounter problems regardless of the flare radiuses.




Closed Thread

Posting Permissions

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

1e2 Forum