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JL ported box spec 4 10w6v2


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bigwise1 
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Posted: January 14, 2005 at 8:39 AM / IP Logged  
  I've decided to go ported and I know there's been some discussion about JL's recommended specs.  Should I stick with JL's specs or not?  If not:  how big, slot or round port, and what should it be tuned to? 
jeffchilcott 
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Posted: January 14, 2005 at 5:40 PM / IP Logged  
the boxes I design for this sub for a street beat box, are 1.68 cu ft internal with a tuning freq of 36 hz. I would highly recommend using a slot/rectangular port
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bigwise1 
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Posted: January 14, 2005 at 6:32 PM / IP Logged  

jeffchilcott wrote:
the boxes I design for this sub for a street beat box, are 1.68 cu ft internal with a tuning freq of 36 hz. I would highly recommend using a slot/rectangular port

for 1 10?  that is more than double jl specs.  i know people say sealed for sq and ported for spl but how does this box sound?  i listen to rock/rap about 70/30.

jeffchilcott 
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Posted: January 14, 2005 at 7:14 PM / IP Logged  
well if you listen to more rock. The I might go with a smaller enclosure, But I am running each one of my eclipse 10's in a similar enclosure and they sound great. I listen to rock/rap about 50/50   so I know where you are coming from.   If you went with something around 1.25-1.4cu ft I think you will be fine, Use a freeware program like Win Isd to design the ports trying to keep your vent mach to a minimum.
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kfr01 
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Posted: January 14, 2005 at 7:25 PM / IP Logged  
Manufacturers post smaller box sizes because small sells. Most are smaller than ideal, especially for ported.
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bigwise1 
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Posted: January 14, 2005 at 7:29 PM / IP Logged  

jeff,

  what is vent mach?

kfrO1,

   do you have any box sice recommendations?

jeffchilcott 
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Posted: January 14, 2005 at 7:33 PM / IP Logged  
from my understanding and I know there is more to it, It is the speed of the air/ or force of the air traveling through the port.   I have found if you are trying to keep a ported box as clean as possible there are 3 key things that I use.
Low tuning frequency
low vent mach, but not so low there is not air moving
slot/retuangular ports help alot!
Thats just how I go about things and havent had a complaiant yet
2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
heavilymedicate 
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Posted: January 14, 2005 at 7:58 PM / IP Logged  

kfr01 wrote:
Manufacturers post smaller box sizes because small sells. Most are smaller than ideal, especially for ported.

True, so true.

What will you get for Christmas, bad boy? Coal........or Visonik?? - stevdart
Wow, is everyone clueless and lost in the dark? - uthinkuknoaudio

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