 |  | |  | | CCA Back Bacon
Join Date: Sep 2007 Location: Hamilton Posts: 38
| minimum port diameter is 4" in diamiter for 36hz for my box, what if i run a 2" port tuned to 36hz for my box becouse the 4" will be too long? will it work the same? | 
|  | |   | | | | | Administrator
Join Date: Feb 2006 Location: BC Posts: 13,726
| Short answer: Nope.
__________________ Paul Niwranski
1966 Cadillac Superior Crown Royale Limousine Hearse 
If you're mirrors ain't shakin...you got taken...
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Be careful what you wish for... | |
| | | | | | | | CCA Hoser
Join Date: Mar 2007 Location: Regina Posts: 182
| You could be safe with a flared port as you typically see an effective velocity of half that of a straight port, but more information would definitely be necessary. If the proper precautions aren't taken, you run into chuffing/noise and port compression.
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Join Date: Oct 2000 Location: TORONTO Posts: 6,954
| WOOT WOOT Legia in the house | |
| | | | | | | | CCA Back Bacon
Join Date: Sep 2007 Location: Hamilton Posts: 38
| its a 0.75 cube ft box with a 10" jl audio w0. i want to tune it to 36.5hz for that setup my culculation show that the minimum port diameter is 4". that port has to be 31.13" in langth which is way to long for my box, but if i use a 2" port the the langth has to be 7.01" so that would work. | |
| | | | | | | | CCA Hoser
Join Date: Nov 2007 Location: Toluca Mexico Posts: 62
| yes will work, you may find some air noise, but will work...if your calculation are ok...
__________________ I have a good background, and I like to share it...  | |
| | | | | | | | CCA Back Bacon
Join Date: Sep 2007 Location: Hamilton Posts: 38
| is there i way i can lower the air noise with out increacing the port diamiter? | |
| | | | | | | | CCA Hoser
Join Date: Feb 2006 Location: ontario cambridge Posts: 184
| ok man..ill let you in on this...wo series Jl are absolute bottom end and like 125 rms. Ive learned the hard way too, but you're going to be dispointed with this sub. Sealed they work great for a little punch, but ive read your posts and i think you are expecting too much from this little weeny sub even ported. Maybe you should buy a little higher end sub with more power handling and go sealed?
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| | | | | | | | Administrator
Join Date: Feb 2006 Location: BC Posts: 13,726
| Listen to Legeia - a flared port is the only way to reduce port velocity at the outlet which will directly result in reduced vent noise. It still won't help with compression though.
I would use a 3" flared port as a minimum. Remember - the vent doesn't have to be inside the box. You could use a labrynth slot port as well.
__________________ Paul Niwranski
1966 Cadillac Superior Crown Royale Limousine Hearse
If you're mirrors ain't shakin...you got taken...
RIP Member #8
Be careful what you wish for... | |
| | | | | | | | CCA Back Bacon
Join Date: Sep 2007 Location: Hamilton Posts: 38
| so the port can stick out of the box? how would i make a flared port, do i just smothe out the edges?
thanks for all your help guys | |
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