Ryan horn

no i wasnt sure if i could turn it wit out messing with the sound but i cant turn it either lol. the box is only 10 inches deep with the sub in the middle which is 8 inches deep lol. but no the sub is firing forward. i have had the sub firing backward and it sounded amazing i just had to lay my seats down all the time which is a big inconvience. and the box is sealed off from the trunk like u are talking which helped sound now i just wanna get my port right. so i did some research and found some calculators on the internet that tell me a 3 inch port with 2.4 cuft needs to be 29 inches long. so now my question is if i do two 3 inch ports which is close to the recomended vent area should i make each one 14.5 inches long or does a muti port mess with sound?

No that's not what I meant... What I'm saying is the the clearence btw the top of the box and the truck deck (the area behind the bak seat and bak window) is only about 8 inches so I will have to have most the port inside the box or do mulitiple ports to keep the ports ouside of the box.

thank ya for the equation but that is my max bc I can't bring the port down from the top and to wedge it through the sub hole it can't really be any longer. From trunk floor to the top deck is only like 18 inches and I am porting though the deck to prevent trunk rattel

okay the box is currently 29x10x16. And it had a 3x9 round port and I just put in a 4x12 yesterday it sounds better as far as port noise and sq but now won't hit low notes. But really my only limitations are the lengh of the port. Someone posted I need two 4x30 round ports and the max length of port I can get is prob 14 inchs. So to get everything tuned right and proper ports I am willing to build a new box to get the right cubic feet. I just need to know how to tune it...

Okay I can't even get 30 inches of port so if my max external port was 10 inches and I can go 12 inches inside what would b my best option? Like 4 3 inch ports at 22 inches or what if this won't work I'll just go wit a short six inch to get rid of some port noise... I need opinions here. I am gonna use my curent box regardless and the hz it's tuned is variable right now. I just want to hear what sound this sub is really puttin out cuz it's not loud now...

okay if I did this I can't keep all 30 inches out of the box would it affect sound that much if half was in the box?

if I did this... What should the length be? And what difference would length make?

This is the external port the head unit settings and the only adjustment on the amp

Alright math is not a weak point for me but this is really gettin me. That formula says 7 square inches. I don't see how... Wouldn't the length factor into that formula also? I don't see how I would get the 32sq inches of port if a 3 by 8 port is only 7 lol

well the port meets the minimal requirements, but if u think it's to small how big should it be? And it's a crossover on te head unit not just a bass boost. i dont see how it meets the minimal. you need atleast 24 squar inches of port. i always go on the 16 square per foot on all my boxes, just my prefference. but if you do the math click here it is radius^2 * pi. so yea 7 square isnt enough. okay okay makes sense. Well I was just told that the port was build to spec so I believed it cuz they work at an audio place lol. But the port is already external so I will try and stick with the same box. I will try a different port size and get bak with ya guys. Thanks for the help.

well the port meets the minimal requirements, but if u think it's to small how big should it be? And it's a crossover on te head unit not just a bass boost.

okay I'll dig the amp out tonight. And it's firing forward and sealed to where there is no pressure in the trunk. I'll take some pictures tonight and post em This has been kind of a long night... Did you figure out the problem on your own? Hope the BL is bumpin'! haha no still haven't figured it out but I have been busy I got it all taken apart tonight and tomo in the day light I will take some pics but my amp don't have any crossovers or any kinda settings. All it has is a gain. I know that sounds crazy but I'll post a pic tomo to prove it. And settings on the sub on the head unit are normal, 50hz, and that's pretty much it lol. I'm thinking the port is to small. Reason I say this is bc it sounds awesome till the sub gets around half it's excursion. Then port noise takes over... But the box is build at 2 cubic feet and has a 3 inch round port that is 8 inches long I believe.

okay I'll dig the amp out tonight. And it's firing forward and sealed to where there is no pressure in the trunk. I'll take some pictures tonight and post em

Well that's kinda a prob to lol but I have had the sub with the same amp for about three months in a different box and sounded fine but to answer ur question I'm using one of the older xtant amps like a 1001. It claims it's a 1000 watt amp but it gives this bl more than it wants. But the amp does have very many options or a crossover. And I had boomers audio in tulsa set the amp so I donno what it's set at to be honest

Hey everyone first off I'm new to the site so I would like to say hi. Now I have a 2006 impala and I have a fi bl 12 and I had a fully costom box build that is right at 2 cubic feet and is tuned at 33hz potted through the trunk deck. Now the sound is horrible so atomatically I think it's the box but my buddy has the same size box and same size port that was taken out of a mozda rx8 and it's just sitting in the bak of a Mazda b2200 and we put the sub in that box and it freakin pounds. We took his treo out and put in my box and it has good sound. So my question is why in the world does the fi not sound good? I have had it in boxes that load up in the truck and sound amazing but rattel the crap outta the truck so we ported it throught the deck to stop the rattels. Any help or suggestions are appreciated.