B&G Neo8 Measurements - Page 3

Jeroenkv · 20th March 2006, 06:51 AM

Quote:

Originally posted by Tenson
350Hz? I am very surprised. Do you have some measurements for this system? I’d be interested to see them.

Not that surprising, because B&G recommends a -12db filter at 400/500hz. That makes 350hz with -24db not a problem.
http://www.partsexpress.com/pdf/264-713.pdf page 5

Tenson · 20th March 2006, 01:11 PM

You must listen VERY quietly? Do you not also find the response starts to roll-off a fair bit above that, or does the slightly large baffle fix that? With a 23cm x 23cm baffle you can see on my plots it only extends to about 700Hz.

I think we definitely have different taste

Jeroenkv · 20th March 2006, 02:20 PM

Quote:

Originally posted by Tenson
You must listen VERY quietly? Do you not also find the response starts to roll-off a fair bit above that, or does the slightly large baffle fix that? With a 23cm x 23cm baffle you can see on my plots it only extends to about 700Hz.

I think we definitely have different taste

I had the same feeling when I tried it, but baffle step and the larger baffle helped to keep it flat. No dips and smooth take over by the woofer. Baffle is 35 X 35cm. My wife does not think I listen quietly....

Before this I listened to the Scanspeak Reference Monitor which is flat as possible. So my reference is o.k.

Jeroenkv · 22nd March 2006, 04:13 PM

Reponse of my Neo8PDR in open baffle (all between -3db/+3db)
[IMG]

[/IMG]

(Low 16khz has to do with microphone)

Tenson · 22nd March 2006, 05:10 PM

Thanks, but surely that is the applied EQ, not the actual response of the drivers? Is that a DriveRack?

Jeroenkv · 22nd March 2006, 05:23 PM

Quote:

Originally posted by Tenson
Thanks, but surely that is the applied EQ, not the actual response of the drivers? Is that a DriveRack?

You are right it is the applied EQ, so you have to invert!!
I don't use the EQ for the Neo, because it is a very flat response. I only use a Behringer DSP1124P for low channels to correct acoustics (<350hz).

Tenson · 22nd March 2006, 05:41 PM

Do I take it that you targeted a flat response and told it to auto EQ?

Where did you take the measurements? Just wondering how much 'room' there is in the measurement.

Jeroenkv · 22nd March 2006, 05:48 PM

Two places. At 1 meter and at the listening position (+/- 3 meter). Listening position is leading for me (that is what I hear).

cph2000 · 22nd March 2006, 08:30 PM

I have heard this unit in the Martin Logan mosaic speaker (neo8 + neo3 in a diploe with a 8" metal woofer crossing rather low at 450 Hz and 3200Hz) - it was very musical and open - a speaker I could live with !

This might just be a tricky driver to use, but it can sound good !

inertial · 23rd March 2006, 09:47 AM

Hi Jeroenkv,
Outstanding performance!!
I am surprised because my Neo8PDR measure quite different...
With a baffle 27cm wide and a big rear closed box(stuffed) mine are flat 800-5500Hz, at 400Hz = - 8 dB plus the peak at 12KHz is another
+ 8 dB. (Anechoic simulated) Good agree with BG data.
Now you are dipole and sure you have done great work with driver position/offset/baffle and also you are" in room measurement", but the difference is "suspect" to my eyes.
How much precision can have the DSP8024 ?
Anyway best two measuring more than one less!

Cheers,
Inertial

22nd March 2006, 04:13 PM	#24
Jeroenkv diyAudio Member Join Date: Jul 2005 Location: Uitgeest	Reponse of my Neo8PDR in open baffle (all between -3db/+3db) [IMG][/IMG] (Low 16khz has to do with microphone)

22nd March 2006, 08:30 PM	#29
cph2000 diyAudio Member Join Date: Feb 2004 Location: copehagen	I have heard this unit in the Martin Logan mosaic speaker (neo8 + neo3 in a diploe with a 8" metal woofer crossing rather low at 450 Hz and 3200Hz) - it was very musical and open - a speaker I could live with ! This might just be a tricky driver to use, but it can sound good ! __________________ .

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20th March 2006, 01:11 PM	#22
Tenson diyAudio Member Join Date: Feb 2006 Location: Kent	You must listen VERY quietly? Do you not also find the response starts to roll-off a fair bit above that, or does the slightly large baffle fix that? With a 23cm x 23cm baffle you can see on my plots it only extends to about 700Hz. I think we definitely have different taste

22nd March 2006, 05:10 PM	#25
Tenson diyAudio Member Join Date: Feb 2006 Location: Kent	Thanks, but surely that is the applied EQ, not the actual response of the drivers? Is that a DriveRack?

22nd March 2006, 05:41 PM	#27
Tenson diyAudio Member Join Date: Feb 2006 Location: Kent	Do I take it that you targeted a flat response and told it to auto EQ? Where did you take the measurements? Just wondering how much 'room' there is in the measurement.

22nd March 2006, 05:48 PM	#28
Jeroenkv diyAudio Member Join Date: Jul 2005 Location: Uitgeest	Two places. At 1 meter and at the listening position (+/- 3 meter). Listening position is leading for me (that is what I hear).

23rd March 2006, 09:47 AM	#30
inertial diyAudio Member Join Date: Aug 2004 Location: Italy	Hi Jeroenkv, Outstanding performance!! I am surprised because my Neo8PDR measure quite different... With a baffle 27cm wide and a big rear closed box(stuffed) mine are flat 800-5500Hz, at 400Hz = - 8 dB plus the peak at 12KHz is another + 8 dB. (Anechoic simulated) Good agree with BG data. Now you are dipole and sure you have done great work with driver position/offset/baffle and also you are" in room measurement", but the difference is "suspect" to my eyes. How much precision can have the DSP8024 ? Anyway best two measuring more than one less! Cheers, Inertial