So im about to build my first ported box and i need a little help. My 15" bl will be getting 2000 watts and has cooling and flatwind options. This will be going into a 96 infiniti i30 (same as maxima) My goal is to have the best LSQ setup as possible leaning more towards spl. I think i want to tune ~35.

If the box is 4 cubes with the tuning at 35, is a port size of 4W x 13h x 21.8L correct? Is that enough port area? And is that a good tuning for my goal?

Also if i use 2 circular ports that are 4" in diameter and 10.5 inches long would that be enough port area and the right tuning?

Thanks a lot -Rick

Edited August 5, 200718 yr by ricksi30

yep im having the same problem i need a dual sub box, i bought a bl15 too great sub by the way ull love it.

yep im having the same problem i need a dual sub box, i bought a bl15 too great sub by the way ull love it.

Yea i do love it. I had it in a prefab for a few months and decided its time to build a real box and see what this thing can really sound like.

Good to see you over here from the .org Rick. Looks like Gordon helped you out before i could get there:)

Good to see you over here from the .org Rick. Looks like Gordon helped you out before i could get there:)

Yea most definitely my box will be around 4 cubes net tuned to 32. Ill make sure to get some pics up on the .org soon.

Edited August 5, 200718 yr by ricksi30

Awesome, don't forget about here too.

Hi, u used winisd and after puting all ur demenssions if you want 4 cu tf for ur sub the port needs to be 22.5 inches length.

At what port area??? Winisd sucks, and especially sucks in the hands of the inexperienced.

If using 2 - 4" aeroports, the port area will be 25.133in^2, and the port length will need to be ~10.675" long.

If using that port size you listed, the port area will be 52in^2, and the length will need to be ~22.675" long.

What kind of max dimensions for the enclosure are you looking at here?

See I thought about getting 2 of these 15" bl's, but would it be better to use just one 18" BTL and put about 4000 watts into that? I have about 9 cubic feet of room for box, that is about right for 2 15"s or 1 18". What would be louder? logically you would think that the 15"s would be louder because you are moving more air but if I am putting the same amount of wattage into a single sub will it be as loud?

I'd rather have more cone area...unless you're trying to fit into a specific SPL pressure class.

No actually this is my first system and I just want to get the best I can for the money I think if I spend a little extra and just get 2 15's I will be louder and it will probably be better for SQ also, I am kind of and LSQ person that leans toward SPL. I love deep bass so how would those 2 15's sound in a box tuned to 30 hz? Also i'm pretty sure they could handle 2000 apiece if they are loaded. The thing is I have been driving now for about 4 months and I have been researching for over a year so I know allot, but I have absolutely no personal experience with systems.

Edited August 6, 200718 yr by Wall_Breaker

A single BL18 with 4000W wont touch a pair of 15s with 2000 each. The 15s have more cone area and the single 18 will be pushed beyond its limits in a daily application (compression, thermal, and mechanical). Theyll work well tuned that low too.