EAW 18" driver specs - diyAudio
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Old 26th October 2004, 05:03 PM   #1
Graydon is offline Graydon  United States
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Default EAW 18" driver specs

Hi guys,

I am building some _very_ large permanent installation subs. Does anyone have specs for the EAW L18 851 18" drivers?

Thanks,
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Old 26th October 2004, 10:06 PM   #2
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I don't have specs off hand, but since EAW is a pro-sound company make well sure before you start that they are appropriate; the average pro-sound sub has an f3 a full octave higher than the average HT sub, irrespective of driver size.
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Old 27th October 2004, 01:38 AM   #3
Graydon is offline Graydon  United States
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Thanks, I'll check into that. I have an email into EAW right now but haven't heard back from them just yet.
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Old 27th October 2004, 01:54 PM   #4
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Check the RCF website, that's where EAW used to source most of their drivers.
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Old 27th October 2004, 08:01 PM   #5
OMNIFEX is offline OMNIFEX  Jamaica
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fs = 38.7

Qes = 0.38

Qms = 6.00

Qts = 0.35

Vas = 200 liters

Re = 5.7

Xmax = 5.1 mm


Have Fun!
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Old 27th October 2004, 08:10 PM   #6
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As I suspected these specs indicate an f3 of 45 Hz, which is quite acceptable for pro-sound, not worth much for HT. At 25 Hz I can blow this puppy away with an eight in a 3.3 cu ft folded horn.
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Old 27th October 2004, 08:11 PM   #7
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Quote:
Originally posted by OMNIFEX
fs = 38.7

Qes = 0.38

Qms = 6.00

Qts = 0.35

Vas = 200 liters

Re = 5.7

Xmax = 5.1 mm


Have Fun!
Check out that Xmax, thats less then 1/4" of cone travel! these babies just dont move a lot of air compared to a home or car type woofer!

Zero
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Old 27th October 2004, 08:14 PM   #8
Graydon is offline Graydon  United States
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Thanks guys.
I'll post a new thread to ask you what you might recommend for my enclosures. I'll post pics of what I have so far too. Later...
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Old 27th October 2004, 08:17 PM   #9
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Just for fun comparison, here are the specs from the Aura sound NRT18-8:

FS: 25Hz
Qes: 0.28
Qms = 4.4
Qts = 0.26
Vas = 475 liters
Re = 5.6 ohms


Xmax = 18 mm

That right Kiddies! 18MM Linear max excursion!!!! Now thats a sub!!!! For us in the USA lets put that into perspective, thats 3/4" of one way travel!


Zero
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Old 27th October 2004, 08:19 PM   #10
OMNIFEX is offline OMNIFEX  Jamaica
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Why would anyone try to reproduce 25Hz with the RCF?

You want a sub, you use a McCauley 6174 (fs = 15Hz)

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