Sub box port hole size
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New member Username: ItatumPost Number: 5 Registered: Jan-10 | i have unported boxes 12". 1.8 cu. ft. for each. how big of a port should i cut???????? |
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Platinum Member Username: InsearchofbassYork, Pennsylvania Post Number: 13333 Registered: Jun-04 | .16 per cubic feet so .32 |
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Gold Member Username: Dustin3Box Designer & Builder...Dustin Post Number: 5304 Registered: Oct-05 | are you going to be using a slot or aero/straight port? |
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New member Username: ItatumPost Number: 6 Registered: Jan-10 | .32 inches around, sorry you will have to pardon my ignorance. and can i just cut a hole or do i need something like a tube to go down inside the box alittle. |
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New member Username: ItatumPost Number: 7 Registered: Jan-10 | it will be a straight port. |
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Gold Member Username: Dustin3Box Designer & Builder...Dustin Post Number: 5313 Registered: Oct-05 | what tuning are you wanting? |
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Bronze Member Username: ItatumPost Number: 11 Registered: Jan-10 | no sure really, im sure that sounds dumb to you but i just want it to sound good, and i skimped on my sub boxes. And now i want to port them, and i knew there had to be a certain way to do it. and thanks for the intrest. |
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Silver Member Username: Simple_smithLapeer, Michigan United States Post Number: 235 Registered: Dec-08 | Port length calculator: http://www.mobileinformationlabs.com/HowTo-1Woofer-Box-CAL%20Port%20lenth%201.ht m Box Calculator (to help understand the principals): http://www.reaudio.com/speaker_box/LPort_Box_Calc.html those should help, but you may end up having to make a new box that is larger to factor in the volume displacement of the port and ported boxes need more volume than a sealed box |
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New member Username: DbdaddyPost Number: 1 Registered: Feb-10 | 16 in sq per foot. 1.8 x 16 =28.8. so make your port 28.8 sq inches on the surface. i like to go a little narrower for low rumble.the narrower you go the more it will act like a big sealed box. and for the length, go from 18 to 23 inches on up. the longer the lower. ide start at around 22. |
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Bronze Member Username: ItatumPost Number: 12 Registered: Jan-10 | thank you for humoring me on this. I look forward to cut-n it up thanks |
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Bronze Member Username: ItatumPost Number: 22 Registered: Jan-10 | boxes are done. And look and sound good !!!!!!! |
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Silver Member Username: Kyle_lowePost Number: 977 Registered: Apr-06 | any pics? |
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Bronze Member Username: ItatumPost Number: 24 Registered: Jan-10 | sorry the pics i try to send are to large i even took some with my phone, and not due to it being a smaller camera, but i thought that the file size was smaller, this fourm only takes pics 600x600 i can only get the pics to 1500x1200. not sure whats up |
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Silver Member Username: SkdooleyRoanoke, VA Usa Post Number: 374 Registered: Oct-09 | Posting pics on this forum is hard, I've been there  |
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Gold Member Username: Dustin3Box Designer & Builder...Dustin Post Number: 5441 Registered: Oct-05 | it's a pain. Just copy and paste the link from tinypic.com or imageshack |
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Bronze Member Username: ItatumPost Number: 25 Registered: Jan-10 |   nevermind here they are, i just cut the hole, and trimed them boxes were already made. |
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Platinum Member Username: Nd4spd18Philadelphia, PA Post Number: 11003 Registered: Jul-06 | hahaha, not gonna work |
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Gold Member Username: Tatonka-[Team Audible Insanity]- Post Number: 3305 Registered: Mar-07 | In no way will that ever sound "great" You obviously didn't take the time to look at any of the links posted to calculate port length. All you have there is a box with a huge air leak in it. No tuning at all. |
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Platinum Member Username: Rovin1 15 = 152.5 DBs ...Trinidad & T... Post Number: 16076 Registered: Jul-05 | is that just a hole cut into the surface with no actual port added in ? ... |
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Bronze Member Username: ItatumPost Number: 26 Registered: Jan-10 | lol oops. i thought it said around 28sq in. And that is around 28sq in. is it suppose to be longer and thiner??? i was going to put something in there to go down in the box. |
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Platinum Member Username: Rovin1 15 = 152.5 DBs ...Trinidad & T... Post Number: 16078 Registered: Jul-05 | if there is nothing going down inside the surface well then all u really did was made nice neat looking hole on a side of ur box - u need to tune that check those links posted above ... |
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Bronze Member Username: ItatumPost Number: 27 Registered: Jan-10 | i was planning on that, but can i still work with this size |
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Gold Member Username: Dustin3Box Designer & Builder...Dustin Post Number: 5442 Registered: Oct-05 | No no. You need an actual "port" like other people have mentioned, not just a cut-out. What's the size of the opening you create? Should look something like this:   |
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Diamond Member Username: WingmanaliveWww.stainles... .ecrater.com Post Number: 22433 Registered: Jun-06 | Aero would have been much easier. You got some work ahead of you now to save the box. IMO you'll wind up making a port and attaching it from inside the box now. Correct length of course. |
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Platinum Member Username: Nd4spd18Philadelphia, PA Post Number: 11006 Registered: Jul-06 | You'd be way better off making a new box... besides the problem you just created, ported boxes have to be larger than sealed to meet the subs specs |
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Gold Member Username: Dustin3Box Designer & Builder...Dustin Post Number: 5443 Registered: Oct-05 | If you wanted to keep the enclosure, i would just use an aero but space looks to be tight anyway in that box.. |
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Bronze Member Username: ItatumPost Number: 28 Registered: Jan-10 | the size of the hole is 2" by 14" thanks for the pics. the work is not a problem this is all fun and games to me. |
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Silver Member Username: Kyle_lowePost Number: 983 Registered: Apr-06 | its all fun and games until someone chops a large hole in the top of their box  |
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Diamond Member Username: WingmanaliveWww.stainles... .ecrater.com Post Number: 22435 Registered: Jun-06 | Well if its just for fun then plug that hole and install an aero. Install a piece of MDF on the inside at least 1" larger on all sides. Glue the #$!@ out of it. Then from the top drop the piece you cut out back in and glue as well. Looks like you'd have room in the front corners for an aero. Have at it. Good thing about aero ports is that they can be easily recycled into another project. If you're worried about the ugly azz plug left behind cover it with a car audio patch or sticker. |
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Bronze Member Username: ItatumPost Number: 29 Registered: Jan-10 | hey thanks for the help on the aero thing. Yeah im just kicking my self now. LOL it looks much easier. But i think i will do both just to see what the fuss is about. i just might send some more pics so you guy can pick them apart  |
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Bronze Member Username: ItatumPost Number: 32 Registered: Jan-10 | i know how im going to sorta fix the one box with the big slot in, it i got the port length off the wed sites above. So im going to get longer screws and some really good wood glue and attach the port from the inside. it sould be ok yeah?} |
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