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View Full Version : First attempt at a ported box need advice



m0nkey
03-09-2010, 09:55 PM
This is going to be my first attemp to build a ported box and I need advice on how big to make my ports . The sub woofer is RE SE 10". I want the port to be hidden so i wanted the port to be located on the side if it can be done. Should i mount the subwoofer in the middle or on the far left. I listen to Mostly RnB and some alternative music so i have no clue what hz to tune it at. Im pretty clue less when it comes to tuning.

I used a caluclator on the measurements and it comes out to be 1.043 cubic feet and the recommended from their website is compact 1.0 and Optimal 1.25 cubic feet.

http://www.bcae1.com/spboxnew2.htm

Specs from their website.

Mounting Depth - 5.25"
Mounting Hole Diameter - 9.25"
Overall Diameter - 10.25"
Bolt Hole Circle - 9.625"
Motor Width - 6.25"
Motor Depth - 2.5"
Basket Depth - 2.75"
Displacement - 0.12 cu. ft.
Weight - 14.5 lbs.

Electrical Q Value -Qes: 0.39
Mechanical Q Value -Qms: 5.5
Total Speaker Q Value -Qts: 0.36
Free Air Resonance -Fs: 25.3 Hz
Equivalent Compliance -Vas: 31 liters
One-Way, Linear Excursion -Xmax: 18 mm
Efficiency -SPL 1W/1m: 85.3 dB SPL
Effective Piston Area -Sd: 310 cm^2
DC Resistance -Re: 1.8 ohm
Nominal Impedance -Znom: Dual 2/4 ohm
Thermal Power Handling -Pe: 300 W
Force Factor -Bl: 14.35

Thanks.

S.P.L.
03-10-2010, 03:12 AM
My advise would be to check out some pre-fab boxes to how they are designed and built. There are a bunch of enclosure companies that have pre-fab boxes that meet your requirements. Also you would definitely want to use a true vent and not just an open slot port. However in either case your vent or port should be vertical and not horizontal. As far as what the Hz the box should be tuned to for optimal sound should be recommend by the manufacturer in the manual for you sub (or online). Building a vented or ported enclosure can be pretty tricky. You might want to look into just getting a pre-fab enclosure. Atrend has some enclosures that might work for you. Based on what your looking for I would recommend the the 10SQV or the 10LSV which are both found on this page Welcome to Atrend Usa (http://74.53.76.202/~atrendus/atrend-pro-series.html) From my experience buying a pre-fab enclosure is the better and easier way to go about getting an enclosure for your sub. In the end if you calculate the cost of raw materials and labor used to build a box it ends up being more expensive and a lesser quality that what a good pre-fab enclosure would cost.

m0nkey
03-10-2010, 11:52 PM
I entered my measurements that i was happy with and i came up with this sizing in the Re website. I have a question will a 1 in ported hole big enough? All the data that inputted into the calculator seems to be correctly paired up with the RE SE 10". It should to good right since i am using their subwoofer.

http://i74.photobucket.com/albums/i243/itsmedavid/ReSeCustomBox-2.jpg

on1wheel01
03-11-2010, 12:21 AM
If u tune it to 24 its gonna sound like shot 32-35 for daily u need a bigger port

m0nkey
03-11-2010, 12:27 AM
If u tune it to 24 its gonna sound like shot 32-35 for daily u need a bigger port

What do you mean tune it to 24 on the calculator it says 34.84 Hz. Is this correct? On the Re Se Subwoofer 10" compact is 1.0@35Hz and Optimal is 1.25@34Hz.

S.P.L.
03-12-2010, 12:56 AM
1 in port is definitely big enough, and from your screen shot everything looks good. But as I mentioned earlier its going to be hard to build your own box especially one with an "L" vent. I'm not saying it can't be done but its pretty tough to build one and keep it air tight without leaks. But as far I can tell everything from the screen shot looks good. Use 3/4 mdf and follow the specs outlined. If you decide not build your own box here are some reliable pre-fab enclosure manufacturers :

Audio Enhancers Audio Enhancers Automotive Speaker Enclosures (http://www.audioenhancers.com)
Atrend Enclosures atrendusa.com (http://www.atrendusa.com)

on1wheel01
03-18-2010, 04:08 PM
oh for some reason i saw 24 my bad

bubbagumper6
03-18-2010, 04:15 PM
SPL you really shouldn't give advice if you don't know what your doing. Don't instruct him to go buy a prefab box, they're usually of horrid construction and not designed for his woofer. He'd be much better off with an enclosure specifically designed for his sub...and I don't know what you consider a "true vent" but there's nothing wrong with a regular slot port...

Anyway, to the OP, the best advice I can give you is to either do some reading and find out what it takes to really design a box (that RE calculator can be fairly inaccurate) Or just pay someone for a design. There's plenty of members on here that will make you a full box design including a cutsheet for less than 10 bucks. Then all you have to do is build it yourself. Once your comfortable building enclosures you can try your hand designing them yourself.