FE207E + Eminence Delta 12 LF

larkinrulez · 8th December 2008, 11:17 AM

Hi...
I just ordered two Eminence Delta 12 LF and want to combine them with my FE207E.
The Deltas will work in a vented 100 - 110 l cabinet.
All the guys in germany who did the Deltas with 8" FR (usually FE206E), put the FRs into a closed cabinet.
That's a good option and will definately work, but I'm thinking about OB!
Did anyone ever try an FE207E in an OB?
Fostex says, that this driver has 95 db/W (m).
Would he have those 95 dB in OB down to 300 Hz?

This is my first own project and I'm kinda excited

thnx
Martin

Godzilla · 8th December 2008, 04:18 PM

If the Fostex is in a sealed box how low does it go?

GM · 8th December 2008, 05:57 PM

In theory, a driver's flat BW begins rolling off around (2*Fs/Qts) in 2pi space, or ~298 Hz for the FE207E, ergo OK to 300 Hz assuming the published specs are reasonably accurate and has a minimum baffle width around (4316.28/(298/2))*0.707 = ~20.48", but haven't compared it to any OB software yet, so Caveat Emptor.

GM

larkinrulez · 9th December 2008, 06:58 AM

Quote:

Originally posted by Godzilla
If the Fostex is in a sealed box how low does it go?

Hi....should go down to 100 - 110 Hz (-3dB)

larkinrulez · 9th December 2008, 08:10 AM

Quote:

Originally posted by GM
In theory, a driver's flat BW begins rolling off around (2*Fs/Qts) in 2pi space, or ~298 Hz for the FE207E, ergo OK to 300 Hz assuming the published specs are reasonably accurate and has a minimum baffle width around (4316.28/(298/2))*0.707 = ~20.48", but haven't compared it to any OB software yet, so Caveat Emptor.

GM

Sounds good enough to try it!

GM · 9th December 2008, 12:04 PM

Great! Looking forward to a review, final design details.

GM

larkinrulez · 9th December 2008, 01:14 PM

Just an idea....something like that...

http://img385.imageshack.us/img385/1...blage02de9.jpg

Pano · 9th December 2008, 04:47 PM

Quote:

Originally posted by GM
..........but haven't compared it to any OB software yet, so Caveat Emptor.

I did a quick run in Xlbaffle. Still 95dB at 300Hz but rolling off under that. It agrees with your numbers, Greg.
Baffle 20.5"W x 47"H.

Looks like it has decent bass response on OB - so it should be easy to mate the the Deltas.

larkinrulez · 10th December 2008, 10:04 AM

Sounds good to me....i'll built them at the last days of the year.

GM · 10th December 2008, 02:29 PM

Quote:

Originally posted by panomaniac

It agrees with your numbers, Greg.

Cool, thanks for checking.

GM

8th December 2008, 11:17 AM	#1
larkinrulez diyAudio Member Join Date: Feb 2007 Location: Bavaria	FE207E + Eminence Delta 12 LF Hi... I just ordered two Eminence Delta 12 LF and want to combine them with my FE207E. The Deltas will work in a vented 100 - 110 l cabinet. All the guys in germany who did the Deltas with 8" FR (usually FE206E), put the FRs into a closed cabinet. That's a good option and will definately work, but I'm thinking about OB! Did anyone ever try an FE207E in an OB? Fostex says, that this driver has 95 db/W (m). Would he have those 95 dB in OB down to 300 Hz? This is my first own project and I'm kinda excited thnx Martin

8th December 2008, 04:18 PM	#2
Godzilla diyAudio Member Join Date: Nov 2005 Location: New York	If the Fostex is in a sealed box how low does it go? __________________ www.zillaaudio.com/bib/bib.asp www.ZillaAudio.com

8th December 2008, 05:57 PM	#3
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	In theory, a driver's flat BW begins rolling off around (2Fs/Qts) in 2pi space, or ~298 Hz for the FE207E, ergo OK to 300 Hz assuming the published specs are reasonably accurate and has a minimum baffle width around (4316.28/(298/2))0.707 = ~20.48", but haven't compared it to any OB software yet, so Caveat Emptor. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

9th December 2008, 12:04 PM	#6
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Great! Looking forward to a review, final design details. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

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9th December 2008, 01:14 PM	#7
larkinrulez diyAudio Member Join Date: Feb 2007 Location: Bavaria	Just an idea....something like that... http://img385.imageshack.us/img385/1...blage02de9.jpg

10th December 2008, 10:04 AM	#9
larkinrulez diyAudio Member Join Date: Feb 2007 Location: Bavaria	Sounds good to me....i'll built them at the last days of the year.

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