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MR_JAMES



Member Since: 10 Oct 2013
Location: ESSEX
Posts: 248

United Kingdom 2011 Defender 90 Puma 2.4 XS CSW Stornoway Grey
diy flat subwoofer (not so flat)
I'm not great at making things out of wood,, mechanics are more my thing (Minis/80 inch)but here is my attempt at making a subwoofer setup in a 90.

I've been looking at getting one of those flat underseat active subs that you can bolt to the cubbybox, but a reasonable one is about £200. I thought to myself, I have a 10" woofer, and amp already.. why not copy the idea?

The box is as small as i could make it.. its a bit wonky here and there (not good with a jigsaw) and carpet is only stapled on.
Wiring up was simple, power from the battery (through heated seat grommet - no drilling required) and single rca cable + remote feed down through dash and hidden under gearbox carpet/cubby box.

The cost in materials was £5 in mdf and £5 in doorstep carpet.


and its very loud Smile


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 1953 80"
1987 mini city e
2011 90"
Post #333236 24th May 2014 2:59pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20454

United Kingdom 
Did you make the internal volume suitable for the Sub? If it's too small it'll starve the sub of internal volume lower it's output significantly.
Too large isn't too good either.
A 8" 500w rms sub should be in an enclosure with dimensions approx* 10x10x12" or there abouts. If not a touch larger.
Post #333237 24th May 2014 3:05pm
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MR_JAMES



Member Since: 10 Oct 2013
Location: ESSEX
Posts: 248

United Kingdom 2011 Defender 90 Puma 2.4 XS CSW Stornoway Grey
Actually... no.

When i had it in the mini the box was 3 times the size. But nevertheless it sounds fantastic. A shame the 10" sub is so deep that i can't make it smaller. 1953 80"
1987 mini city e
2011 90"
Post #333240 24th May 2014 3:25pm
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munch90



Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

England 
custom90steve wrote:
Did you make the internal volume suitable for the Sub? If it's too small it'll starve the sub of internal volume lower it's output significantly.
Too large isn't too good either.
A 8" 500w rms sub should be in an enclosure with dimensions approx* 10x10x12" or there abouts. If not a touch larger.


im sure box should be ported as well
Post #333243 24th May 2014 3:35pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20454

United Kingdom 
You can have sealed or ported, ported is meant to be marginally better but also needs better air flow room and more tricky to work out.
My own is sealed.
Post #333247 24th May 2014 3:51pm
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barbel jim



Member Since: 12 Dec 2012
Location: Northants
Posts: 1423

United Kingdom 2005 Defender 90 Td5 HT Tonga Green
munch90 wrote:

im sure box should be ported as well


Depends on the bass you want....... generally sealed is more punchy so suited more to general mix of music, and ported give a more rumbley bass, but beats blur more. Thumbs Up
Post #333250 24th May 2014 4:05pm
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MR_JAMES



Member Since: 10 Oct 2013
Location: ESSEX
Posts: 248

United Kingdom 2011 Defender 90 Puma 2.4 XS CSW Stornoway Grey
Interesting reading. I have another 10" viper sub,, maybe i will make a ported box and compare the two.
But at the moment.. a sealed box is good.

How do they make those underseat ones if you need a certain amount of... internal volume? 1953 80"
1987 mini city e
2011 90"
Post #333253 24th May 2014 4:13pm
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barbel jim



Member Since: 12 Dec 2012
Location: Northants
Posts: 1423

United Kingdom 2005 Defender 90 Td5 HT Tonga Green
They are smaller cones, 6 or 8 inch, have a different magnet drive, a bit like the shallow mount subs. They are great for what they are, but you will not get the same effect/clarity when playing at volume compared to a passive sub set up
Post #333255 24th May 2014 4:17pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20454

United Kingdom 
If you have a larger space that needs to be made smaller you'd have to fill it in done way with something or a solid baffle.
IMO the seat boxes are useless because you can't really seal them anyway.
On a Puma(and perhaps TD5?) there is plenty of room below the access plate under the cubby.
But to use it your talking of undertaking a lot of fabrication work indeed.
Frankly in the front IMO there's no room for larger than a 10" at the absolute maximum. An8" in my case but that ones pack a punch in it's self.
The limits really are the depths of your pockets in the rear, I'd like a pair of at least 10"s or 12"s in the rear each side as well as the 8" I have in the front.
Would take a lot of juice up though and that'd cost about £1000 at least which I'm not prepared to do really.
Wouldn't want to be known as extravagant where I live after all. Rolling Eyes
Post #333272 24th May 2014 4:52pm
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