If your interested in finding out the size of the
correct speaker enclosure, generally speaking the recomended volume in cubic
feet or litres is generally given with a spec sheet with almost every sub Ive
ever seen, including recomended port legths and diameters. You only need
to work out the amount of air you need to enclose
for example
A sub box recomended to be 2 cubic feet of enclosed
air could be
1 foot high by 1 foot wide by 2 feet
long
ie: multiply the height * width *
length (make sure your figures refer to the internal space not
including the width of the material used)
Within reason you can squash and play with the
sizes as long as your internal volume remains the same
ie 1 foot = 304.8mm therefore 304.8 * 304.8 *
609.6 = 56633693mm total volume
therefore to make a box the correct size given two
of the sizes you want ie: the height (400mm) and the width (600mm) the
other side would be got as follows assuming the enclosure still needs to be
2 cubic feet
400mm * 600mm = 240000mm
therefore missing size = 56633693mm divided by
240000mm = 235.97mm
so your box would be 400mm by 600mm by
236mm
Accuracy is important so try and get your box
within 5% of the recomended volume.
Please also note once building the box you will
have to add the thickness of your material to some of the sides to keep the
internal volume correct
hope this has been usefull
Cheers
Lee MKII 1G-GTE (missing one
turbo)
----- Original Message -----
Sent: Wednesday, March 31, 2004 11:22
PM
Subject: Re: [sconz] Sub brands
anyone know of formulas or websites or where to
get other info on just how big a box should be?
Brendon
----- Original Message -----
Sent: Wednesday, March 31, 2004 10:15
PM
Subject: Re: [sconz] Sub brands
Actually I'd probably say good gear is only
about half the battle the idea is to have a tuned box, ported or sealed, the
tolerance is about + or - 5% of the recommended volume to have the resonant
frequency at its peek, more than 5% either side and a good set of tens or a
single 12 will produce more punch or rumble. In short if you make a
box too small you can restrict the movement and get a tighter sound but
loose overall efficiency, if you box is too large you'll allow the
speker to travel to far and not only get a muffly poor sound but possibly
damage the speaker over time
food for thought
Cheers
Lee MKII 1G-GTE (missing one
turbo)
----- Original Message -----
Sent: Wednesday, March 31, 2004 9:18
PM
Subject: Re: [sconz] Sub brands
ok, 15's are good if they'r
tuned right, and believe me, there aint that many people out there that
can tune them proply that ive found...
i used to own 2 15'
rockfords, and they sounded mint in and out of the cabin, its all in the
tuning on the heady and amp...
----- Original Message -----
Sent: Wednesday, March 31, 2004
9:13 PM
Subject: Re: [sconz] Sub
brands
15's i've been told are a little "slow" and
no so good in the cabin - sound good for the outside world and thats
what some people want but not me.
2 15's is what I was starting to think but
I dunno.......3 or 4 12's would be cooler ;-) altho budget is going down
hill fast.....
----- Original Message -----
Sent: Wednesday, March 31, 2004 9:07 PM
Subject: Re: [sconz] Sub brands
ok, not everyone will
agree with me here, i already know that...
my bets would be 15's.
one or 2, up to u
and brands probly go for
fusion powerplants, rockford fosgate, they'r both rumbly subs and got a
lot of power behind them
----- Original Message -----
Sent: Wednesday, March 31, 2004
9:07 PM
Subject: Re: [sconz] Sub
brands
rumble rather than punch - like dr dre
kinda beats and people under the stairs (people under the stairs -
acid rain - download and listen to that) - bass like
that
----- Original Message -----
Sent: Wednesday, March 31, 2004 9:02 PM
Subject: Re: [sconz] Sub brands
depends what ur
after... punch, rumble...
----- Original Message -----
Sent: Wednesday, March 31, 2004
8:08 PM
Subject: Re: [sconz] Sub
brands
I have all pioneer gear in my car
including a 12" DVC sub, Ive always found their equipment to
be reliable and well produce, with clear sub bass sounds when the
box is built to the "Q" of the speaker
Cheers
Lee MKII 1G-GTE (missing one
turbo)
----- Original Message -----
Sent: Wednesday, March 31,
2004 8:03 PM
Subject: [sconz] Sub
brands
Hey all,
Who makes the best subs - 12's and
15's
Opinions apreciated
Hunt
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http://www.supras.org.nz/ ---
Supra Club of New
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http://www.supras.org.nz/
---
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http://www.supras.org.nz/ ---
Supra Club of New
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http://www.supras.org.nz/
---
Supra Club of
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http://www.supras.org.nz/
---
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http://www.supras.org.nz/
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http://www.supras.org.nz/