SPL & SQ / Fabrication

I have a buddy that got a got a box from another friend for free and we noticed the port area after the turn at the back of the box isn't as wide as the port at the front. The first length of port is 2.5" wide, and the second length is 2". Will this cause any major difference in sound? I'm guessing it will slightly tune it less at 2" than if it was 2.5" in the 2nd length. Example:

Metered with SPL-LAB same song and I got a reading of 160.1 @36 hz in the port and 146 @48 hz in the cabin. Does this sound right for the difference in frequency readings? Or is the deeper bass getting trapped in the trunk? Let me know what you guys think, thanks.

Ok guys, I'm gonna need some help with an enclosure. First, some background. I have a friend who everyone had him talked into buying the usual kicker stuff, but luckily I got to him in time. This will be his first setup. Anyways, I coached him through buying an AQ2200D (could have chosen a better amp, I know, but his budget was sort of limited and we didn't feel like going through the hassle of looking for used deals on others), an 18" DC Lv5, and all the other bits. Should all be getting here by the end of this week. Alright now to the enclosure: The vehicle is a 2005 Tahoe Z71 (captain chairs in the rear). Now I measured awhile back, but if I remembered right, it should…

Hey guys i built this box before i even got the subs just wanted to show you guys. The dimensions are 30x14x14 its 2.5 cubes tuned to 30 hz (2) 3 inch areos 14 inches each. let me know what you think. And how you think it will sound. im going to put 1700 watts rms @ 2 ohm with my saz 3000d.

I had a 4th order bandpass box designed for me, but he didn't give me an output graph or tuning frequency or anything else. So before I build the box, I'd like to know what the output graph looks like (if there are any high/low peaks/dips in the curve at certain frequencies). How can I figure out what the 'range' of the box/sub is? I'm not sure how to ask this, but I'd like to know the frequency band width. Whats the lowest the sub should play and the highest the sub should play. So I know where to set my subsonic//lowpass filters. Can anyone help me? Let me know what measurements you might need or just tell me how I can calculate it.

I wanna know if I could build a 4th order bandpass box for 4 12" subs in the trunk of my cavalier? I have a Soundstream Rubicon 2500D amp and a Kinetic1200 under the hood and a 2400 in the trunk. Thought about something sort of like this but, not too sure it would work with being such a small trunk...Just need some help tryin to figure out if I should do it or not. http://sketchup.google.com/3dwarehouse/details?mid=5362d8048075cdd16b752e7529d36aed[/media]

Just got metered on an Audio control...Did it with music. One song (The one I figured was the loudest) hit 145.0db! The song was Plies - All Black slowed by wattz305 All the other songs we tried were in the 140-143.5 range. I went in figuring I'd be happy hitting those numbers. Around 40hz seems to be the sweet spot. Still wish I had access to a termlab though.

Wood Thickness 0.75 Height 30 Width 38.5 Depth 15 Sub Displacement 0.42 Port Height 28.5 Port Width 3 Tuning Frequency 32 Port Length 29 3/16 I get Around 6 Cubes at around 32 hz, after sub and port displacement...i just want to be sure they are correct. thanks.

Attempting to fit two 18" drivers (fi bl) in 34" width. Each driver would be mounted to an angled piece of double baffle mdf. I made a simple rendering to give a visual: Width is 34", each angled piece would be 20"x20" and angled at 45degree angle. The distance from edge of box to where the angled pieces meet would be approx 10". enclosure will be ported, most likely with aero ports for the sake of being easy. Has anyone had any experience with a enclosure like this? output wise vs conventional ported enclosures? Does the fact of the drivers being angled towards each other cause any problems, cancellation, etc. any other input? thank you

Hi guys, I 'm always trying to improve my system. I have a 15" xcon and a 1500 watts Sundown saz amp. The car is a hatchback toyota Auris, with a little trunk. I had a slot ported box with sub up and port up, at 3.5 ft3 at 32 Hz. This box was too big for the trunk, but I thought it was not the right one for my car. I've heared this same box in a smaller car, with the same setup, and it was ...insane. In my car, it was not really loud. I have, now, a 3ft3 sealed box, with the sub firing back ; I found it was better than firing up. So, here is my question : if I want to do another ported box, what would be the best choice ? Sub and port firing back, or sub up and port back …

When Calculating port length, How can you enter the box volume after port displacement, without knowing what the port length will be. Or do you put in what you want your box to be after the displacements and then design a box that takes this into account. For example, if you want a box to be 4.5 cuft. after displacements you would use this to calculate the port length. Then after you have that you would calculate the port displacement lets say is .5 , SO you would do .5 + 4.5 to get 5 cuft., then design a box that is five cuft before port displacement and use the port length that was calculated to get the desired tuning? If someone needs further explanation please ask. …

so me and my buddy decided to make the box for my 15 thats on the way and here are some pics gonna carpet it soon! tell me what you think, and be honest!

ive been told that puttin carpet on the inside of a box will make the sub think the box is bigger there for sound better or louder. but i personaly like fiberglassing the inside to gurantee its super sealed and not falling apart ported or selad enclosure which would be the better idea or maybe carpet over fiberglass

for a friend. its an explorer.. 30 deep 40 wide. and tall well that depends on how much air space will be needed for the design 2 kicker L7 15s "all black" i donno if it makes a shit i dont follow kickers. not sure where to tune it at .,. i was thinking 33 hrtz or so. sub up port up. thanks,

Ok i have always used areo ports and now i want to try a slot. I have used a few calculators and they tell me my length needs to be 23in long for the tune i want what length are they referring to? Overall length of the port ? Can some one please help lol I am looking to build a 5cube box for 4 sa 10s tuned to 35-36 htz I figured with the displacement of the subs and port i woul need a gross volume of 5.8cubes that would bring the net volume down to 5-5.1 right ? So far i have gotten the measurements from the calculator width-45in heigth-20in depth-14in. This box is going in a quad cab ram so i have space. Am i right with these measurements? and i am shooting for a mix of …

I suck at google sketch. Can someone help me? I know the dimensions but I would like to see it in 3D. Width, 38 inches Height, 18 inches Top Depth, 10 inches Bottom Depth, 18 inches This is for a 15 inch sub. The sub will be mounted on the angled panel. I am using two 4 inch aero ports that will be mounted on the top 10x38 panel.

I have my 3/4 thick mdf cut. Took me about 3 hours just to cut it. The only thing im confused about is putting 2 pieces of wood together. Would i have to apply wood glue to the 2 pieces, attach them together, and wait till it dries, then predrill, then screw? Im really confused. This is my first box. I dont want the edges to crack.

Hey! I´m new here Just ordered a Warden 18 2x2 ohms thats going to sit in my SAAB 9000 coupé in the trunk. It will get about 4500 rms from a Soundstream Goliath Tarantula XXX 6500D. How big box do I need? I want to play loud (ofc) but loud to music, not to pure sinewaves. The music I´m playing is Lil Jon, Ludacris, Young Jeezy... that kind so tuned to 30 hz would be really nice Depending on what the FS is. Cant find it *If I´m spelling something wrong its because I´m Swedish *

So I've been reading a ton about aeroports and I've heard they reduce port noise and take up less space therefor reducing box size. I want to do two SA10's in 3 cubic feet tuned to 33 hz. I've been trying to use all sorts of different calculators and such trying to figure out port sizes and what not but its not coming together for me. Basically I want to know how you figure out port length and diameter as well as port displacement in the box. Also where is a good place to get these ports from. I'm going for a really nice sounding setup that can get loud if I wanna show off a tad . Any info I didn't include just ask and I'll do my best to fill in the gaps. Thanks BumpinAl…

So i've read on numerous threads that the RE box calculator tunes a tad bit high. Personally, i'm a noob when it comes to making boxes so this RE calculator is just a great tool!! I use it mixed with Win Isd to make my box! i just really wish win isd had a slot port option So for people like me, and many other box designing noobs the RE calculator is awesome!! Its free, easy to use, you can see what changing port dimensions do to your tuning. So, does the Re calculator ALWAYS tune high? is it the same everytime? I'm curious because i'm desiging, or trying to, a box for my friend for his first gen 15" icon which i purchased for him. Also, on a side note, when designing…

im getting my system installed next week. Am i going to get bored of it after a while? Will it not seem as loud as it was when i first put it in because i got used to it? I am going to run 1500 watts rms. i have a sundown sae 1200d, 12in fi bl fully loaded, 0 gauge amp kit, and im going to do the big 3 upgrade. This is all going in a 2010 maxima

Ok so i have decided to build a box with aero port but im a little lost with the tuning the box will be 6.5 cubes with a fi btl 18 in it if i use two 6" aeros how long do they need to be to get too 33 hz ? thanks for the help guys =)

I've always painted my sub boxes and thought i might try giving carpeting a go. I was wondering where you guys buy you carpet from? I'd like something cheap, but of decent/good quality. (doesnt everyone. lol) Thanks in advance

I have a sundown sae 1200d, which can handle 1500 at 1ohm..... I also have a 12 inch fi bl fully loaded. Would i have to get an extra battery or do the big 3. Will i be fine if i just do the big 3 upgrade? I have a zero gauge amp kit.

Today im going to build my 1st box for the fully loaded fi bl 12in. Im going to be using 3/4in thick mdf fiber board. Would i have to use braces to hold the box, its just one 12in, and also i have a Sundown sae 1200d amp. Is it capable of producing 1500watts rms. What would you have to adjust the amp to to have a good, loud sound? I have a Stinger amp kit 0 gague, and extra 25 feet of 0 gauge wire for the big # upgrade, and i also have a kinetic battery the khc 1600. Just recentley my friend got his system installed. He has the same equipment as i do, but he has the FI Q. Let me tell you, it is LOUD AS HELL, For just one 12inch... omg i could barely breath. To be honest i…