My sub box for CC

MattB · Post by **MattB** » Tue Feb 04, 2003 12:57 pm

The saga continues...

OK, last night I attacked my original 1 cu ft box with a hammer (reminds me of the 206 advert!) and made it 0.8. Fitted the speaker back in, plugged into car, wiped all the snow off that fell onto the amp when I opened the boot :O and cranked up the volume.

It now sounds as I expect it to sound - quite a good range of bass, not too rumbly with nice definition for rock music. Excellent!

So I have left a 1.5 cu ft carpetted box that I'll need to do something with. My idea is to split the box into three sections and fit two extra smaller subs for higher range bass. I've done the maths (properly this time!!!) and it looks like this is possible using a couple of small JL audio speakers.

Has anyone else ever tried this?

MattB · Post by **MattB** » Tue Feb 04, 2003 12:58 pm

Oh meant to ask, anyone ever tried stuffig their enclosure with fibreglass or something similar? What difference does it make? I'm guessing that it wlil make the sonud less rumbly.

Craig Atkins · Post by **Craig Atkins** » Tue Feb 04, 2003 1:07 pm

Matt,

As far as I know (I'm no expert, just been reading up a lot on this stuff in the last few weeks)...

Stuffing a box makes the sub 'think' it's in an enclosure that is up to 40% larger (in volume)...

A larger box (in your case 1.5 cu ft instead of 0.8 cu ft) provides more air cushioning for the sub, resulting in a less 'resonant' bass sound...
Larger boxes seem (with my experiments on computer bass box modelling proggys) to keep the volume of the lower end of the frequency range more in line with the volume of the higher bass frequencies

If you look at the modelling software, and comments from many people, the car audio manufacturers aim for the best sound from a small enclosure.. trading low end response for a punchy sound and all-round performance....
therefore, making your box larger shouldn't cause too much problem within reason... making it smaller would be bad due to not enough cusioning for the sub

Plus they say that sealed encloures are much less fussy about the air volume required than a bandpass or ported sub box is

I'm at work now, so i can't remeber the few pieces of GOOD (i.e user friendly) pieces of software I used right now, but a good list can be found here: http://members.chello.se/jpo/softwares.html

Cheers mate!

Craig

androxe · Post by **androxe** » Fri Feb 07, 2003 10:04 pm

Is It posible to to get a 21mm-cable trough that little hole there?

/Andreas
Sweden

MattB · Post by **MattB** » Sat Feb 08, 2003 11:51 am

Is It posible to to get a 21mm-cable trough that little hole there?

I doubt it - I'm running a thicker wire through it this weekend so will try & get you the max size that will fit & post it on here.

MattB · Post by **MattB** » Sun Feb 09, 2003 4:43 pm

I've jsut run a thicker opwer wire thruogh the car for my amp, and taken some pics which may help other people do the same. They're on this page: http://comevisit.me.uk/gallery/view_alb ... box&page=4

And androxe, you won't get a 21mm wire through (that's huge! what do you need that for?!) the biggest hole you can safely drill is about 10mm diameter.

androxe · Post by **androxe** » Sun Feb 09, 2003 6:35 pm

[And androxe, you won't get a 21mm wire through (that's huge! what do you need that for?!) the biggest hole you can safely drill is about 10mm diameter.[/quote]

When i said 21 mm I meant 21 square mm...the diameter is about 5,2 mm...

androxe · Post by **androxe** » Sun Feb 09, 2003 6:44 pm

My 206cc has the wheel on the left side. So itÂ´s much more things i front of that hole than it is on your car....ItÂ´s imposibly to drill o hole there without taking lots of stuff away from there....
Maybe you can take a picture from under tha car where I can se where the power cable comes out in to the enging bay?
IÂ´d appreciate that a lot!

/Androxe
Sweden

MattB · Post by **MattB** » Sun Feb 09, 2003 8:31 pm

When i said 21 mm I meant 21 square mm...the diameter is about 5,2 mm...

D'OH! OK I'm stupid, yeah that will fit fine.

MattB · Post by **MattB** » Sun Feb 09, 2003 8:34 pm

My 206cc has the wheel on the left side.

How do you reach the pedals?!

Not sure if taking a picture from underneath will help to be honest - also don't have any way to get under the car!! I'll have a look later this week though (car's going in the garage tomorrow for a few days) and see what I can do for you.

androxe · Post by **androxe** » Sun Feb 09, 2003 8:54 pm

matt B: Ok, thanks anyway for the pictures you have let me see....

/androxe

androxe · Post by **androxe** » Sun Feb 09, 2003 9:03 pm

On my 206cc itÂ´s som sort of crank on the other side of the hole where your power cable goes. It looks like a tow crank...Is it near that "tow crank" your power cable comes out?..maybe that crank is on the other side of your car...

/Androxe

MattB · Post by **MattB** » Wed Feb 19, 2003 6:57 pm

When one speaker just isn't enough...

It now consists of the 10" Kenwood 1000W sub, plus an 8" Sony Xplod 500W sub. The Kenwood dies above 700Hz so the Sony fills in the gap up to 3500Hz. There'll be another identical Sony 8" going in directly below the current one... to make it look better if not sound better!!!

More pics here:

http://comevisit.me.uk/gallery/view_alb ... box&page=5