Why are there not many 18" subwoofers available? - diyAudio
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Old 3rd February 2006, 12:40 AM   #1
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Default Why are there not many 18" subwoofers available?

Besides the handful of over priced companies you just can't find a decent 18". Why?, are they taboo or something? I mean you can find a ton of 15" at a fair price but step up one level, and BAM. Example, you can get a Dayton quatro 15" right now for less than 80 clams, try that for an 18". Maybe i wrong and just have'nt looked on the right companies site.
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Old 3rd February 2006, 12:54 AM   #2
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HI JK,

A lot of people consider 18" too big for a dynamic driver. Some manufacturers agree and stop at 15", some make 18 and bigger.

By 18" the moving mass is getting pretty heavy. The larger the cone gets, the stiffer it has to be to prevent flexing during excursion. The stiffer it is, the heavier it is, the bigger the motor structure must be and so on.

And we don't want "slow" woofers now do we?

There are quite a number of 18" PA drivers but that's a different story.

This is a very simple look at it and there are exceptions but hopefully it helps.
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Old 3rd February 2006, 04:17 AM   #3
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you said 18" and bigger. Bigger? Who, what when and where?
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Old 3rd February 2006, 04:25 AM   #4
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pa. sure.

but still huge. in my opinion. anything over 12 for the average system and 15 for your real hometheaters is overkill.

but for real theater or actual concerts...

nothing is too big if implemented correctly.
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Old 3rd February 2006, 04:47 AM   #5
Arx is offline Arx  Canada
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Quote:
Originally posted by J.k.Wilson
you said 18" and bigger. Bigger? Who, what when and where?

Clarion makes, or maybe used to make, a 32" driver. It was around 1000W. Unfortunately it also falls outside of the reasonably priced category.

I think for anything practical in any way, a good 15 is plenty, which is probably a view shared by most manufacturers.

Of course, we don't always want to be practical, do we?
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Old 3rd February 2006, 06:51 AM   #6
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Not exactly cheap:

http://yu-ra.tripod.com/fostex/FW800.htm


a little cheaper:

http://www.magnat.de/content/carhifi...pl=7,%208&s=10

Regards

Charles
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Old 3rd February 2006, 09:15 AM   #7
simon5 is offline simon5  Canada
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http://www.ascendantaudio.com/allliance_page.html

This one is 400$, but it's a serious woofer!
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Old 12th February 2006, 06:30 PM   #8
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>Why are there not many 18" subwoofers available?

18" usually means a *very* large Vas.
A large Vas means a large cabinet.
Usually too big for most home enviroments.
So, there is little demand.

I personally have two 18"ers in a 60 cu ft box.
Awesome bass
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Old 13th February 2006, 09:52 PM   #9
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........two 18s in 60 cu ft you say? is this IB?

if not















...............youre my hero
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Old 13th February 2006, 10:18 PM   #10
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Like some have already said... the 18" are slower in response. My sub is a custom designed 18" driver that is tuned 4th order with a 2nd order electronic filter. That cuts the size of the box down from 13cu ft to 6cu ft. Awsome bass for those effects movies in the theatre.

For music I enjoy two custom 15" subs with similar tuning in two 4 cu ft boxes.
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