Fibreglass Sub Box Thickness

[GiJOr33]

Hi,

I'm making a box out of fibreglass and i was wondering how thick i'd need to make it. I'm using chicken wire as a mould and was going to fibreglass both sides and leave the wire between for extra strength. A mate reckons you only need it to be 3mm thick. So 1 sheet on each side of the wire and that's it. I would have thought at least 1cm thick would be needed.

Also i was going to make the mounting face where the sub screws in out of 18mm MDF. How do i actually make that part of the fibreglass box? will i need to put fibreglass sheeting over the mdf as well?

Thanks

Andrew

[ron]

you will need to make a mould for it first.

but be carefull cos fibreglass box will give you a very high resonance which you dont want.

i would stick to >16mm MDF only .

ron

[GiJOr33]

yeah i've got chickenwire to make the mould... what do you mean it gives a high resonance? the sound waves keep bouncing around in the box? i was going to put polyfill in it to lower that.

you have an R33... you know on the driver side if you pull out the boot liner there is a fair bit of cavity into the rear guard, i was going to make it so it moulds to use most of that and fit neatly in.

[ron]

mmm.. i actually saw that. but hey give it a go . but try to make it as thick and heavy as possible of you want a good sub bass.

i have a single 12 a sealed box and fully satisfied.

ron