GolfGTIforum.co.uk

General => Car audio => Topic started by: Yuley on 01 July 2009, 18:57

Title: sub box size?
Post by: Yuley on 01 July 2009, 18:57

right guys, now changing the sub :P

i need some help with the box design please, going to house 2 RE Audio SX.15's. but gotta fit into a mk3 boot lol. measurements i got were 35" wide, 17" high and 18" deep. its the port size im struggling with. i want it tuned to around 35hrtz. dunno if any of you could help?

thanks
Yuley

Title: Re: sub box size?
Post by: troublestarter on 01 July 2009, 23:14

here you go
http://reaudio.com/speaker_box/LPort_Box_Calc.html
that should help
add your dimensions and then you can work out the port length
i did it earlier and the port wanted to be 3" wide and 12.75" long to give tuning of 35hz
this was based on your measurements but taking into account these were external dimensions i deducted the wood thickness so internally it would be 33.5" x 15.5" x 16.5"

Title: Re: sub box size?
Post by: Len on 02 July 2009, 09:13

A Mk 3 boot is big enough for that?  :shocked:

Title: Re: sub box size?
Post by: troublestarter on 02 July 2009, 19:02

it certainly is
it will take up most of the boot though

Title: Re: sub box size?
Post by: Len on 02 July 2009, 20:23

Yea see this is it! Why lose the boot completely!

Title: Re: sub box size?
Post by: wil0 on 06 July 2009, 00:58

a sealed box would be smaller, and sound tighter. normally the subs manual advises on the optimum enclosure size.

Title: Re: sub box size?
Post by: B-chi on 06 July 2009, 22:36

I had 2 powerplants sealed & I have to say I preferred them ported.

@Len. I thought that's what boots were for. I'll be shortly putting in my new inch thick, 3cu ft, double baffle box for my 12inch. No room for anything after that!

A well designed, well built ported enclosure should sound better than a sealed.

Title: Re: sub box size?
Post by: Yuley on 09 July 2009, 18:17

Quote from: troublestarter on 01 July 2009, 23:14

here you go
http://reaudio.com/speaker_box/LPort_Box_Calc.html
that should help
add your dimensions and then you can work out the port length
i did it earlier and the port wanted to be 3" wide and 12.75" long to give tuning of 35hz
this was based on your measurements but taking into account these were external dimensions i deducted the wood thickness so internally it would be 33.5" x 15.5" x 16.5"

thankyou :)

it should be loud (fingers crossed) lol

you think its a step up from my 10" HCCA?

Quote from: Len on 02 July 2009, 20:23

Yea see this is it! Why lose the boot completely!

you have the backseats for storing stuff lol, bott is for bass :P

Title: Re: sub box size?
Post by: russ-vdub on 10 July 2009, 11:07

Quote from: wil0 on 06 July 2009, 00:58

a sealed box would be smaller, and sound tighter. normally the subs manual advises on the optimum enclosure size.

True but you wouldn't see 35hz in a sealed box I don't think.

Title: Re: sub box size?
Post by: Yuley on 12 July 2009, 18:53

Quote from: russ-vdub on 10 July 2009, 11:07

Quote from: wil0 on 06 July 2009, 00:58

a sealed box would be smaller, and sound tighter. normally the subs manual advises on the optimum enclosure size.

True but you wouldn't see 35hz in a sealed box I don't think.

+1. ported is the way :)

Title: Re: sub box size?
Post by: Yuley on 17 August 2009, 19:40

job done, all fitted, with slight ajustments to size to tune it to 33hrtz 

will upload pictures later :)