Ports

[Miller 10+ year member]

If I have a box (LxDxH) 29.5x15.5x16 (3.29 cubic feet total) and it has 3 3" cuts for ports...How long should my ports be to get the best spl bass? I have 2 10" Type-R subs..Thanks

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[nswartley 5,000+ posts]

how much power are you putting to them?

also...you cant always just cut out a sealed box and put ports in it...

 

[Miller 10+ year member]

Im putting around 250 RMS to them......It was never a sealed box...I built it ported....any idea how to tune it to get some good spl and keep my sq

 

[crhye250r 10+ year member]

That will give you right around a 34 hz tuning if that helps you......That is a good number..

 

[Miller 10+ year member]

What will give me tuning of 34Hz.....I never mentioned a port length....What port length do you use to get around a 34 Hz or anything in that range to make my subs hit harder? Again...I have 3 3" cuts and PVC right now that is 13" long...However I can always shorten them if I have to. THanks

 

[crhye250r 10+ year member]

I saw the 13" length in your other post. The 13" each port would give you a 34 hz tuning...

 

[Miller 10+ year member]

Alright, Thanks alot. I'll just set them to that and keep the 13" ports. I have a subsonic filter that is set at 20 Hz, you think my subs are safe with that?? And last, can you tell me how I figure out how to tune a box, or how I can calculate the tuning of a box. Thanks

 

[nswartley 5,000+ posts]

your subs should be fine with that filter....learn to use this for tuning http://www.linearteam.org/winisd.html

 

[crhye250r 10+ year member]

Download WinISD Pro...and itll do it for ya...well...pretty much. Youll get the hang of it. You should be okay with that filter, as long as you dont feed the subs a butt load of power more than they want.. You may eventually want to get a higher filter though.. Watch your subs closely and make sure they dont bottom out.

 

[crhye250r 10+ year member]

Beat me to it.....Prick //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif Just kidding....LOL.

 

[nswartley 5,000+ posts]

Originally posted by crhye250r Beat me to it.....Prick //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif Just kidding....LOL.

 

[crhye250r 10+ year member]

LOL...//content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[Miller 10+ year member]

Alright Thanks....The only problem is that program doesnt have the Alpne Type-R's as one of the driver options....you guys know any sub similair to it, or how I can get the Type-r's as a driver?

 

[crhye250r 10+ year member]

You can enter its parameters....Use your users manual for the sub...enter the parameters in the add drivers section...You should be good.. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[Miller 10+ year member]

Alright....So final, you think those box dimensions and port diameters and lengths will be a good box. Any idea how much louder I should expect it to be from a small Q-Logic box (Had to get rid of that piece of ****)??