EAW 18" driver specs

Graydon · 26th October 2004, 04:03 PM

Hi guys,

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

Thanks,

BillFitzmaurice · 26th October 2004, 09:06 PM

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.

Graydon · 27th October 2004, 12:38 AM

Thanks, I'll check into that. I have an email into EAW right now but haven't heard back from them just yet.

BillFitzmaurice · 27th October 2004, 12:54 PM

Check the RCF website, that's where EAW used to source most of their drivers.

OMNIFEX · 27th October 2004, 07:01 PM

fs = 38.7

Qes = 0.38

Qms = 6.00

Qts = 0.35

Vas = 200 liters

Re = 5.7

Xmax = 5.1 mm

Have Fun!

BillFitzmaurice · 27th October 2004, 07:10 PM

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.

Zero Cool · 27th October 2004, 07:11 PM

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

Graydon · 27th October 2004, 07:14 PM

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...

Zero Cool · 27th October 2004, 07:17 PM

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

OMNIFEX · 27th October 2004, 07:19 PM

Why would anyone try to reproduce 25Hz with the RCF?

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

26th October 2004, 04:03 PM	#1
Graydon diyAudio Member Join Date: Oct 2004	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,

27th October 2004, 07:01 PM	#5
OMNIFEX diyAudio Member Join Date: Mar 2003 Location: Locked Up In The Amp Rack	fs = 38.7 Qes = 0.38 Qms = 6.00 Qts = 0.35 Vas = 200 liters Re = 5.7 Xmax = 5.1 mm Have Fun! __________________ *OMNIFEX*

27th October 2004, 07:19 PM	#10
OMNIFEX diyAudio Member Join Date: Mar 2003 Location: Locked Up In The Amp Rack	Why would anyone try to reproduce 25Hz with the RCF? You want a sub, you use a McCauley 6174 (fs = 15Hz) __________________ *OMNIFEX*

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26th October 2004, 09:06 PM	#2
BillFitzmaurice Banned Join Date: May 2004 Location: New Hampshire	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.

27th October 2004, 12:38 AM	#3
Graydon diyAudio Member Join Date: Oct 2004	Thanks, I'll check into that. I have an email into EAW right now but haven't heard back from them just yet.

27th October 2004, 12:54 PM	#4
BillFitzmaurice Banned Join Date: May 2004 Location: New Hampshire	Check the RCF website, that's where EAW used to source most of their drivers.

27th October 2004, 07:10 PM	#6
BillFitzmaurice Banned Join Date: May 2004 Location: New Hampshire	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.

27th October 2004, 07:14 PM	#8
Graydon diyAudio Member Join Date: Oct 2004	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...

27th October 2004, 07:17 PM	#9
Zero Cool Audio Junkie diyAudio Member Join Date: Sep 2004 Location: MN	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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