Author Topic: sub box question (Read 1752 times)

MinTze · « **on:** November 05, 2006, 03:25:07 PM »

hey guys,i wonder is all the material for sub box sound the same?eg.MDF,acrylic,those "sam giap ban" for funiture.if i use sam giap ban instead of MDF,will sound better or worse?

GRexer · « **Reply #1 on:** November 05, 2006, 03:38:21 PM »

As long as the plywood is thick enough and the box is made sturdy enough(with some bracing at each corners), i don't see a problem. Recommended get 1" for plywood, heard people using birch ply with good results, but i'm not sure what it's called in Malaysia.

fooyc · « **Reply #2 on:** November 05, 2006, 04:58:25 PM »

Mahogany or cengal lagi stim kan ?

Sorry MinTze, just joking. But like you describe, those are the usual materials.

I have seen somebody use 2 layer of those, so called better structural integrity.
Sure is solid, but the weight increase too.

GRexer · « **Reply #3 on:** November 05, 2006, 07:49:27 PM »

Well... i actually prefer to have some sort of double baffle for the front of the enclosure where the sub is mounted, as a single layer might not be able to support the subwoofer's weight, and also, as there's a hole cut into the particular piece, there's certain rigidity being compromised, hence the need to double baffle it, or maybe using a thicker material compared to the sides.

netken · « **Reply #4 on:** November 05, 2006, 08:18:44 PM »

seriously, do u guys think the type of wood would actually create better bass??

was thinking if the answes is no, why dun we utilise fiber or even plexi boxes ... just a thought nia ...

fooyc · « **Reply #5 on:** November 05, 2006, 08:23:03 PM »

Make a solid steel box! woohooo

GRexer · « **Reply #6 on:** November 05, 2006, 08:34:24 PM »

The type of wood doesn't create better bass actually, it's the density and rigidity that makes the box more air tight that makes it theoritically sound better.

And also, there's the resonance of the box to take care of as well, hence fiberglass boxes tend to need some dampening added to it.

netken · « **Reply #7 on:** November 05, 2006, 08:37:17 PM »

plexi??? say if we have a thicker plexi made to spec??

GRexer · « **Reply #8 on:** November 05, 2006, 10:07:08 PM »

You don't have to have a thicker plexi made to spec, plexi comes in very thick sheets as well, BUT, they are FREAKING costly for what they are mate, believe me, anything more than 10mm for plexi costs more than you would expect ;D

Bert · « **Reply #9 on:** November 05, 2006, 10:40:44 PM »

I was looking for someone to make for me a .75" thick Teak / Jati box but can;t find anyoen to do so... Meranti also can I guess... At least it will look good once you polish it nicely

llsaw · « **Reply #10 on:** November 05, 2006, 10:41:48 PM »

A carbon box would be even better

GRexer · « **Reply #11 on:** November 06, 2006, 12:57:44 AM »

You and your carbon fetish

I think most would only do a FB box and the last layering wif a CF look, like those cheapo so called "CF" bonnets largely available in the market nowadays.

Oh ya... but i think i'll post this CF thingy in the home audio forum instead.

netken · « **Reply #12 on:** November 06, 2006, 07:39:05 AM »

or alternatively do a MDF then use CF sticker, but the weight will give it away ....

Zenn · « **Reply #13 on:** November 06, 2006, 12:18:15 PM »

the stronger the material the better the box

best is concrete....

chyanne · « **Reply #14 on:** November 06, 2006, 01:06:09 PM »

what u guys think of using alloy??

netken · « **Reply #15 on:** November 06, 2006, 01:10:28 PM »

i think plexi should be the most resonable one ...

as for the thickness do u think thick insulation / padding / damping would be able to compensate for the lost in the material thickness???

e.g. 1/2 inch plexi but with 2 layers of Dynamat and say with Deflex pad .. compared to a normal 1 inch thich mdf??

MinTze · « **Reply #16 on:** November 06, 2006, 01:35:50 PM »

Quote from: chyanne on November 06, 2006, 01:06:09 PM

what u guys think of using alloy??

alloy will have too much deflection isnt it?

Bert · « **Reply #17 on:** November 06, 2006, 03:34:40 PM »

Nenen,

then that will negate the reason of usign plexi which is to have the see through-ness to show off the magnet

netken · « **Reply #18 on:** November 06, 2006, 03:56:22 PM »

Quote from: Bert on November 06, 2006, 03:34:40 PM

Nenen,

then that will negate the reason of usign plexi which is to have the see through-ness to show off the magnet

yeah.. i agree.

just for sake of discussion, does it make any difference?

Bert · « **Reply #19 on:** November 06, 2006, 06:09:22 PM »

on the alloy thingie.. if not mistaken.. metals have a higher resonant frequency comapred to organic materials... thus, it may not work. Also since i have not seen a metal box b4 so dunno how it will really sound like.

On the DE plexi box... it would work as it does the same principle of mass loading the box and the deflex pad to disperse back waves... I did see one install on the net before.. the guy had a plexi box with the sub firing into a pile of sea sand... looks very nice and you ahev the imprints of the bass waves in the sand... very cool looking

GRexer · « **Reply #20 on:** November 07, 2006, 12:14:49 AM »

alloy wouldn't be good as there's the resonance issue to take care of.

Yeah... i was also thinking that the plexi + DE thing would actually defeat the purpose of using plexi :P As 1/2" thick plexi would also be quite expensive compared to MDF(quite a few times raw material pricing)

aurie · « **Reply #21 on:** November 07, 2006, 12:16:14 PM »

MDF laa bro...1" thick for the sub box.i suggest Megasound or CV.They do nice & quality Sub Box.

chyanne · « **Reply #22 on:** November 07, 2006, 01:05:01 PM »

hmmm.... dunno but saw someone using an alloy box for his rs subs....nvr hear em but saw it......... dunno hows the outcome

mnkh27 · « **Reply #23 on:** November 12, 2006, 12:48:47 AM »

Just use 1" mdf for the fronts and strengthen it further by bracing the enclosure.