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Old 31st August 2008, 19:20   #8641
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To be truthful - I do not know much about sub woofer & their enclosures.
I generally stick to sealed boxes - lesser number of parameters to play with. Volume of Enclosure / Type of Port / Length of Port / Diameter of Port / Turbulance etc. etc.

Aluminium is used by a few High End Audio Makers for their enclosure. It is a great material for hi frequency face plates & wave guides etc. Very few use them for low frequency enclosures. They need to be very very thich & rather well braced etc.

What exactly did you have in mind ?
Please do elaborate & give full details...
Thanks,
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Old 1st September 2008, 10:49   #8642
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Magma Ji the MDF is quite good for enclosures. Get it braced inside and you are good to go. Searching for alternate materials will cost money and the results might not be good in the first go.
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Old 1st September 2008, 10:58   #8643
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[quote=low_bass_makker;960658]Magma Ji the MDF is quite good for enclosures. Get it braced inside and you are good to go. Searching for alternate materials will cost money and the results might not be good in the first go.[/quote
Perfect;

If you want to go 'complex'
Take 2 layers of 12mm MDF & 'sandwich' it with 6mm of Ply.
This is for the outsude & then the indise you brace & line with noise kill.
This will be cheaper & easy to execute with comparison to Aluminium.
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Old 1st September 2008, 11:01   #8644
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Quote:
Originally Posted by Magma View Post
what is the effect of flex in a subwoofer box.
FG enclosures for their subs in their boots.
i have started working on a cylindrical Aluminium (2mm thicknes) enclosure for a sub.
do you guys thick 2mm stainless steel would be better( however SS is a pain to work with bend and yes the enclosre would get heavy!)
Quote:
Originally Posted by greenhorn View Post
MDF is really among the better stuff.
s subwoofer box needs to be stiff and well dmaped. the materials used to do this are not important. MDF is the easiest to work with and gives reasonable returns.

FG is also quite doable but it is a bit messy to work with. If you are using aluminum I would suggest 3mm+. 2mm is way too thin.

I would use Aluminum as a sort of former and cover it with a material that can damp the natural resonaces because naked aluminum will ring like a bell.

JBL for example makes their Control 1 (and it's predecessor the Pro III) out of aluminum but these speakers are small and hence panels are not large.

If it was me I'd encase the Alumium tube in resin bonded FG and line the tube with ribbed rubber. Then stuff the tube with (about 0.5kg per cu. ft. of) dacron damping.
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Old 1st September 2008, 11:06   #8645
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Quote:
Originally Posted by BHAGWAN View Post
I generally stick to sealed boxes - lesser number of parameters to play with.
also when DIYing a sealed box is more tolerant of deviations from published T/S specs. Almost all driver manufacturer's specs deviate from published specs. That is why something like MLSSA or LMS/LEAP or Clio is essential for DIY. espcially if you are considering complex enclosures (bass reflex, Transmission line, band pass, etc..).
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Old 1st September 2008, 11:32   #8646
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Quote:
Originally Posted by navin View Post
FG is also quite doable but it is a bit messy to work with.
Yes, one can understand only when he starts working with it.

OT.- Navinji,
Is there anything which can be used to remove resin smell from the car, already tried perfumes and camphor.
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Old 1st September 2008, 13:52   #8647
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Quote:
Originally Posted by low_bass_makker View Post
Magma Ji the MDF is quite good for enclosures. Get it braced inside and you are good to go. Searching for alternate materials will cost money and the results might not be good in the first go.
arre raghuji
i cannot use MDF for cylindrical enclosures.Making the joints airtight will be a pain.
i like DIY. gives me something to do after work and during work too!!i generally laze around in office at least twice a week.
i would consider the extra money i spend as money spent on a hobby!

Quote:
Originally Posted by BHAGWAN View Post

If you want to go 'complex'
Take 2 layers of 12mm MDF & 'sandwich' it with 6mm of Ply.
This is for the outsude & then the indise you brace & line with noise kill.
This will be cheaper & easy to execute with comparison to Aluminium.
again thats not possible with a cylindrical enclosure.
i find aluminium and SS only suitable for cylindrical stuff

Quote:
Originally Posted by navin View Post
s subwoofer box needs to be stiff and well dmaped. the materials used to do this are not important. MDF is the easiest to work with and gives reasonable returns.

FG is also quite doable but it is a bit messy to work with. If you are using aluminum I would suggest 3mm+. 2mm is way too thin.

I would use Aluminum as a sort of former and cover it with a material that can damp the natural resonaces because naked aluminum will ring like a bell.

JBL for example makes their Control 1 (and it's predecessor the Pro III) out of aluminum but these speakers are small and hence panels are not large.

If it was me I'd encase the Alumium tube in resin bonded FG and line the tube with ribbed rubber. Then stuff the tube with (about 0.5kg per cu. ft. of) dacron damping.
3mm aluminum hmm.. will have to check whther it cant be bent to for a cylinder..

i am using AL as a former too.
i plan to damp the inside with noisekill and foam sheet(not spongy foam -the sheet that you see in cheap womens handbags
i assumed 2mm AL + noise kill damping + foam may be suitable

Also i dont know anthing about FG
Navinji
Any offer to teach me (hands on)?

hmm ok lets see to stop the confusion

a 10 inch sub maybe on the way to me as we speak.
though ive planned the regular mdf enclosure in the boot, i have the time and the the experimentation bug biting me to try out either a 12 inch * 13 inch high sealed cylindrical enclosure. (thats why Aluminum)

Last edited by Magma : 1st September 2008 at 14:00.
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Old 1st September 2008, 14:40   #8648
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2 mm aluminum will flex. You will need to reinforce it.
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Old 1st September 2008, 18:10   #8649
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Quote:
Originally Posted by low_bass_makker View Post
2 mm aluminum will flex. You will need to reinforce it.
arre how?
should i brase some aluminium rods across the diameter or just noisekill and foam will sufice?
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Old 1st September 2008, 22:32   #8650
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Quote:
Originally Posted by mohang_j View Post
Is there anything which can be used to remove resin smell from the car, already tried perfumes and camphor.
try baking soda or onion slices in water. leave over night.

Quote:
Originally Posted by Magma View Post
3mm aluminum hmm..

i am using AL as a former too.
i plan to damp the inside with noisekill

Also i dont know anthing about FG

a 10 inch sub maybe on the way to me as we speak.
though ive planned the regular mdf enclosure in the boot, i have the time and the the experimentation bug biting me to try out either a 12 inch * 13 inch high sealed cylindrical enclosure. (thats why Aluminum)
I have seen 6mm SS bent. Aluminum is much softer. What sort of bending/rolling/forming equipment do you have.
see this website for ideas
Metal Forming, Metal Fabricating Services

Quote:
Originally Posted by Magma View Post
should i brase some aluminium rods across the diameter or just noisekill and foam will sufice?
just use the Aluminum tube as a sort of "farma" and build over it using layers of FRP/FG.
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Old 2nd September 2008, 00:16   #8651
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Quote:
Originally Posted by navin View Post
just use the Aluminum tube as a sort of "farma" and build over it using layers of FRP/FG.
will call on you later about the fibre glassing.
though there are amny websites i have not followed completely.Also i do not know where to get the FG materials/ingredients from here in mumbai
can you help?
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Old 2nd September 2008, 11:51   #8652
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Quote:
Originally Posted by Magma View Post
will call on you later about the fibre glassing.
though there are amny websites i have not followed completely.Also i do not know where to get the FG materials/ingredients from here in mumbai
can you help?
where in mumbai are you? PM me and I'll give you details.
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Old 3rd September 2008, 01:47   #8653
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Can someone tell me which one is a Good amp in germany?? i am going there so want to buy a good amp. i would like to know the amp model # and the price if possiable. want to have 4 chl amp to run front comps and the sub. would love to have a amp with a power ratio of more than 100RMS for both front and rear sub in briged mode.
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Old 3rd September 2008, 02:44   #8654
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Sorry 1 more Question, If a person listen to Trance, then what is more imp, Sub or a Comp. I mean to have a better sound, the person should invest in sub or a Comp if he listen to Trance?? reason for asking is so that i can spend my money on comps rather than on a sub in order to get better sound.
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Old 3rd September 2008, 08:19   #8655
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Quote:
Originally Posted by navin View Post
where in mumbai are you? PM me and I'll give you details.
Navinji,
Can i request you to post it in the forum - Just for the sake of information & with pricing would be more helpful.
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