Building my system for my 05. (box question)

[05chevyproject]

I just got done ordering my subs and amp for my 05 chevy silvy single cab. I ordered 2 kicker solobaric l7 10's and a jl audio 1000/a slash amplifier. Now I need to build my box I will have a internal volume of 1.409 cubic feet in each box and I want to tune it to ~ 28hz using a 3" built in squre port. I have all my info except the speaker and brace displacement I have contacted kicker for the speker displacement but they are taking a really long time to return my emails. If I can fiqure out this info I can get my final internal volume and calculate my port lenth which will be firing straight up since it will pose the least amount resistance. How do you think the kickers in a box this size tuned to 28hz will sound when being pushed by a jl audio 1000/1 slash amp? I will also be upgrading my head unit and current front and rear speakers and amp. Which right now is a kenwood cd player with infinity reference componets in the front doors and infinity kappas in he rear pushed by and infinty 600watt 4 channel amp. Any suggestions on this part of the system will be greatly appreciated I have a drawing I made of my box design if any one could tell me how to post it.

[gooberchevy]

Unless I'm reading something wrong off the manual on the Kicker website the speaker displacement is .94 ft^3.

28 hz is low, this will probably limit the more upper frequencies, but those low lows will surely be more prominant. I'm not not fully educated on all of that, so somebody else will probably correct me.

The JL amp will power the subs fine.

Especially for a regular cab, rear speakers, or rear fill are not needed. This is somewhat debated, but most people agree that rear fill is not necessary.

What you should do with your budget for front speakers, rear speakers, and amp, is put it all towards deading your front doors, sealing them up good with a nice set of components in them.

Not sure what is wrong with your Infinity components, some people really like them . But if your looking for something different, the only way to find something you like is go listen to speakers. People can tell you all day long on here what they like, but you need to go and listen to what you like.

So personally I'd deaden the doors up, eliminate the rear speakers, and get the fronts really tuned in. See if that makes a difference in sound quality. You may just have to due a few things to bring the sound around.

Also make sure you do the big 3 upgrade if you have not already. Keep searching and reading around here, there are many knowledgeable people on FSC.

[05chevyproject]

Where did you find the speaker displacement in the maual I looked around all morning and could not find it lol. As far as the infinity comps go I like them allot but they clip and distort up high and I don't think there is anyway for them to keep up with two subs that will be pounding hard. I had 2 solobaric l5 10's in my last truck in a similar box but it was smaller and tuned to 25hz and they were almost 2 powerful lol. Right now I have my back kappas turned almost all the way down so I know what your saying about the rear fill. I have read several threads on here about sealing the front doors and deadning is defiantely in my plans one thing I cannot stand is rattles.

Also do you think 28hz is to low I am just not sure what I want to tune it to I want it to blow my doors off but at the same time have a decent sound. if you know what I mean

[AuburnTruck93]

how are you getting almost 3 cubes from behind the seat of a reg cab? id like to see the box design and measurements.

28 hz is really going to choke the upper freqs. i think you would be much happier with like 31-33 range for a reg cab.

[AuburnTruck93]

sry double post

[05chevyproject]

Once I figure out how to post the design I will and I am relativly short at 5'8" so where I drive is up a little way. I will be removing my center good for nothing seat and building a custom amp rack/ center console. But overall the box design is very simple, and spans almost the entire width of the truck. Let me finish my cad drawings tonight and I will figure out how to post them tomorrow. The calulator I used is saying 1.409 without a sub. I thought about it and there is no way a 10" sub takes up .97 cubic feet, so I believe thats the wrong meaurement. I may not even brace the box since it will be such a shallow box. I have not made up my mind on the frequency yet because I do listen to all types of music depending on my mood all I know is I want a good medium that will still get down low when it has to.

[AuburnTruck93]

33 is probably your best bet. it will get low but it will keep those higher freqs for rock. depending on your blend you could go 35 but i think you like low bass rather than versatility.

as far as not bracing i dont think that is such a good idea. if your box is like what i am picturing your going to have a long front face and that could produce a lil flex. even if you do brace it, it wont have to be anything extreme just something small to hold that face back.

[akjay907]

man u need 3/4" for that...but damn that system is gonna KILL!!!!! and powwered by the best amp in the world. (1000/1) i wanna hear it!

[05chevyproject]

yeah I build all my boxes out of 3/4" but if I had more room for this one I would probably use 1" There will be a ton of screws and liquid nails then I was thinking about sealing the whole thing in fiberglass resin and not sure if I want to paint it or carpet it. I am having problems figuring out this cad drawing so I may just post a hand drawing lol, thats gonna look retarded since I cant draw to save my life. I do like my low bass when I'm listening to that type of music but I also listen to a very wide band of music so now that i think back on my other box I think 28 is way to low and 35hz sounds more reasonable besides I will have enough power to ring my head anyway.

[///M5]

Ok, wow. Tuning low won't hurt your upper frequency range at all.

You need a port that is WAY larger than a 3" for a single L7 10 more or less 2 of them. Do

No way in hell do you have enough space to port to 28hz anyways though, not even close.

L7's do prefer a higher tuning frequency. Why you ask? Because they will have more output if you tune high, playing flat isn't their game so there is no need to tune these subs in particular that low. Most people who like the L7's will probably tune in the 35-38hz range. Personally I can't stand the sound of anything tuned anywhere near that high, but this install isn't for me.

[05chevyproject]

Ok how large of a port are you talking about because a 3" 1:2 ratio port at 28hz needs to be 18" long and my box is 26" high and 28" wide for each sub so I can port it either way with a 3" port with plenty or room and a port does not have to be straight you can wrap it inside the box.

[///M5]

I'd use around 20-30 sq inches (a 3" port has 1.5*1.5*Pi=7sqin so not nearly big enough). A 5" would be okay if it were an aeroport.

[05chevyproject]

Alright well a 5" will def not work its showing i would need a port length of 46" to tune to 30hz and 76" to tune to 28hz. Why does the port length have to be longer for bigger ports? What is he disadvantages of a smaller port? Whistling? I know on my old box I ended up using a 2.5" pvc port that was ~10" i think and it did not sound to bad.

[akjay907]

28 inches high? that box fits?

i cant even get more than 19 on mine...well its an 98 nvm

[05chevyproject]

It will fit but be very narrow at the top only 4" from front to back but this is how I am able to have so much space in my box. The only real loss I will have is my seat will be pushed forward a few notches and wont recline near as far but with me being short its not really a loss at all. The box is going to sit on top of the hump behind the seat and go all the way to the bottom of the rear window. it will be 8" deep at the bottom go up 14" and have a 2" notch for the back plane and then 4" deep on top and 57" wide. I did a test fit out of 1/4" plywood this weekend and it will fit fine.

[pl4yboy]

Originally Posted by ///M5

Ok, wow. Tuning low won't hurt your upper frequency range at all.

You need a port that is WAY larger than a 3" for a single L7 10 more or less 2 of them. Do

No way in hell do you have enough space to port to 28hz anyways though, not even close.

L7's do prefer a higher tuning frequency. Why you ask? Because they will have more output if you tune high, playing flat isn't their game so there is no need to tune these subs in particular that low. Most people who like the L7's will probably tune in the 35-38hz range. Personally I can't stand the sound of anything tuned anywhere near that high, but this install isn't for me.

Basically, you took the words out of my mouth. I saw so much wrong with this when I started reading.

First, no way you're going to get those subs in a proper ported enclosure behind your seat. For every ft^3 of airspace, it is recommended to use at least 10 in^2 of port area. Also, the larger your port area, the longer your port is going to be. Now, after that, 28 hz is completely too low for L7's. As stated, they prefer the 35 hz range, which is exactly what I'd tune to if I was you. Even if you wanted to tune to 28 hz, the lower your tuning, the longer the port is going to be, taking up even MORE of your airspace. I just don't see this happening without choking these subs off in a super small enclosure.