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Suppose you had a really big pair... [message #14497] Sun, 08 February 2004 03:10 Go to next message
wunhuanglo is currently offline  wunhuanglo
Messages: 912
Registered: May 2009
Illuminati (2nd Degree)
Like two Altec 3182 woofers (18 inch, Fs=18, Qts=0.4, EBP=45)

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3702903562&category=47094&sspagename=STRK%3AMEBWN%3AIT&rd=1

In a closed box approximately 7 ft^3, they're F3 at 40Hz, -6dB at 30Hz

Vented at 30 ft^3, they're F3 at 20Hz

Now 30ft^3 does approach difficult to accomodate in a domestic situation (to put it mildly), but would it be worth it vs. 6dB of EQ in 7 ft^3 to flatten the response to 30Hz (probably not even that much boost with room augmentation)?

Re: you have entered the sickness Zone [message #14498 is a reply to message #14497] Sun, 08 February 2004 10:30 Go to previous messageGo to next message
Bill Martinelli is currently offline  Bill Martinelli
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Registered: May 2009
Illuminati (1st Degree)

Just buy an EQ :)
you'r wife will love you for it
hahaha

Re: the sickness Zone - ooops! it shows? [message #14499 is a reply to message #14498] Sun, 08 February 2004 15:23 Go to previous messageGo to next message
wunhuanglo is currently offline  wunhuanglo
Messages: 912
Registered: May 2009
Illuminati (2nd Degree)
Not thinking too clearly at 2 AM.

Fooled with a tape measure for about 5 minutes. No matter what the aspect ratio 30 ft^3 sized to fit through the doorway from the garage into the house is pretty unmanageable.

It ought to have occured to me that it would be approximately the same size as the 26 ft^3 refrigerator in the kitchen - I don't see two of those in the living room.

Looks like it's going to be sealed. The weird thing is my wife is an absolute saint - she wouldn't care what I did. The bad part is that I have to exercise some sort of self control in these matters, not exactly my long suit .

Re: the sickness Zone - ooops! it shows? [message #14500 is a reply to message #14499] Sun, 08 February 2004 15:55 Go to previous messageGo to next message
Bill Martinelli is currently offline  Bill Martinelli
Messages: 677
Registered: May 2009
Illuminati (1st Degree)

I hear ya, My wife is a saint too. Problem is two martini's and self control becomes extinct



[message #14509 is a reply to message #14499] Sun, 15 February 2004 15:14 Go to previous messageGo to next message
Mike.e is currently offline  Mike.e
Messages: 471
Registered: May 2009
Illuminati (1st Degree)
30cubes each?

900L ?

i could design a corner basshorn using the lab12 that does 25hz flattish with ~103db efficiency and less than that volume!

did u buy them?

its hardly worth it,what about raising the Qts artifically and using them for dipoles or IB ! got an attic?

Cheers!

Re: [message #14513 is a reply to message #14509] Tue, 17 February 2004 03:45 Go to previous messageGo to next message
Adrian Mack is currently offline  Adrian Mack
Messages: 568
Registered: May 2009
Illuminati (1st Degree)
This driver doesn't need 900L though unless you want an F3 below 20Hz on its own without room gain.

400L/16Hz tuned gives ~28Hz anchoic F3 and ~22Hz F6 with this driver (Altec 3182).

Its Qts is 0.40

Re: Suppose you had a really big pair... [message #14556 is a reply to message #14497] Sun, 21 March 2004 06:16 Go to previous message
akhilesh is currently offline  akhilesh
Messages: 1275
Registered: May 2009
Illuminati (3rd Degree)
HI,
If you are using them for a sub, think about and active crossover, and biamping them in a much smaller enclosure. I have a pair of EV force 15s that are similar to yours, and if i ever get arounfd to using them, that is what i will do.
-akhilesh

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