cheqmate

I have a 12" Q in a 2003 mustang. I tried both sealed and ported. Both sound amazing. Sealed was a little cleaner, hit harder on short bass notes. I have it ported right now and the sustained bass notes are ridiculous. Just make sure the subwoofer points toward the rear of the car. It is much louder when you remove the back seat.

I am looking to build a slot port box very similar to the threads that are very recent in the forum. My dimensions are slightly different and I want to flare the port walls which will complicate things. My dimensions are: height: 14" width: 30" depth: variable tuning freq: 32 hz box volume: 2.3 cu ft subwoofer: FI Q12 Dual 2 amp: Soundstream PCA1500D Like I said I would like to flare the vent sides by cutting slits in the MDF and bending it. I have made some test bends and they seem to work out pretty well. I have read that adding the flares will require an additional 1-2" of port length. I can add the additional length that is required for the flared port. I thought I would mention this because I could probably get away with a port width of 2" even though it is slightly smaller area than FI suggests. This would help shorten the port length. I would really appreciate someone helping me out with this design. If you could give me an idea of what would need to change if I made the max width 28" instead would be nice. It would also be nice to know what would need to change to tune the box to 30 hz. Possibly the changes needed to make the box 2.0 cu ft. Sorry, I don't want to sound needy ... I really want to equate what you guys/gals design to what I am seeing in BBP6. Thanks in advance for the help.

How are you guys/gals fitting such long ports that are necessary for the Q12 into not very large boxes (1.8-2.5 cuf). I am designing a ported box for my single Q12. (2.2ish cuf @ 32ish hz) I am looking at a 6" port that is around 30 inches long. Is everyone using slot ports with multiple bends? I am not looking to compete or steal any secret designs. I am just looking for suggestions of what other people are doing to port the Q12. Thanks.

So I now have BBP 6 installed and I have started to play with it. I am getting slightly different numbers than Lord Baccus did, but they might be rounding errors. The t/s parameters for my sub are in the link below: t/s params Approximately what length would you expect for a port area of between 24 - 32 sq. inches. Does anyone know how to calculate vent air speed? I want to make sure that the port area is large enough to not have port noise. I will be designing tonight and post what I find. Thanks for the help so far.

Do you think that 18" vent area will be enough? It seems as though Fi recommends 12 to 16 inches per cubic foot of box. That is why I was using such a big vent area. Does anyone know if the equation from the following website is any good/accurate? http://mobile.jlaudio.com/support_pages.php?page_id=165 Was the port of the above enclosure a slot port or a normal rectangular port? I would really like to find a way that I can reproduce the same results as the box from above so that I can play around with the enclosure specs myself. Wow, there was 3 updates while I was typing my response ... Could you point me to where you got the equations you used in your verification spreadsheet?

I used the following website for the calculations: slot port calculator I appreciate your help.

Hello, I am new to this forum and the proud owner of a new dual 2 ohm Q12 with BP option. I am looking to build a ported box for the sub tuned to the recommened 32hz. I would appreciate some help with the design. The sub will be powered by a Soundstream PCA1500D. I will most likely run the sub at 4 ohms for a while until I upgrade my Big 3 sometime this summer. I would like the box to be a slot port with rounded corners somewhere in the range of ~2 cubic feet. The box will be made out of 3/4" mdf Box outer size (max): 12.5" tall 30" or 32" wide (can't recall the correct measurement right now) Depth is variable So far my calculations have brought me to the following: 2.0 cubic feet slot port 11" x 3" internal 33.18 inches long Does this look correct? I am open to suggestions on any changes, etc. Should I make the internal volume large with a shorter port? More or less port surface area? Thanks in advance for the help.