Shouty 206es-r

ConExp · 3rd September 2007, 10:32 AM

I know this topic comes again and again but still to me the answer is not clear.

I have a pair of 206es-r installed in BiBs and I’m accumulating listening time with them.

One thing that bothers me is the some sort of screaming characteristic of these speakers.

Could someone help to clear this up?

Thanks

hm · 3rd September 2007, 11:33 AM

Hello,

look the data below 800 Hz it needs
~5 dB +, and this is a measurement on a IEC norm baffle,
a 25-30 cm wide box is worth than that.

http://www.spectrumaudio.de/ (Fostextabelle)

Xmax only 0,6 there is compression near 0,5 watt ~70 Hz

Up to 800 Hz you can´t get a basshorn, only 200 Hz.

My solution would be
The small Schallmei sat and a sub,
or the SAXOPHON.

1 point is such drivers need a listening distance of more than 4m
then they sound good, in near field ~2 m most the time the
amp can´t reproduce normal levels, because only 0,05 watt is
needed, not every amp is fully there at 0,0...

Scottmoose · 5th September 2007, 10:15 PM

While in principle I agree with Horst to an extent, I don't think its the lack of LF or lower mids that's your problem here. Looking at the ES-R data, even with the ludicrously heavily smoothed Fostex graph, the heavy peak at ~2.8KHz is very obvious, and I'd put money on it being more severe in practice than it appears on that mediocre plot. Even boosting LF sensitivity up to the driver's nominal by whatever method floats your boat, you're still going to have problems, because that peak is slap-bang in the region where our ears are most sensitive.

Two words: phase plugs. They'll take that peak right down, and smooth out the midrange & treble while allowing you to hear more detail, when before, you were just wincing. www.planet10-hifi.com

ConExp · 16th September 2007, 11:02 AM

Thank you both.

Scottmoose, do you have a simulation of the diaphragm excursion as a function of frequency for the design presented in Godsilla’s site?

Thanks

My specific parameters are as follow:
L=387cm
Zdriver=83cm
Mouth area=908cm^2

Scottmoose · 16th September 2007, 11:13 AM

Not to hand. If I have time, I'll re-run the sim & check. Where will they be positioned? The mouth isn't a mouth; it's just a terminus; the room, and it's walls form the mouth you see.

3rd September 2007, 10:32 AM	#1
ConExp diyAudio Member Join Date: Jul 2006	Shouty 206es-r I know this topic comes again and again but still to me the answer is not clear. I have a pair of 206es-r installed in BiBs and I’m accumulating listening time with them. One thing that bothers me is the some sort of screaming characteristic of these speakers. Could someone help to clear this up? Thanks

3rd September 2007, 11:33 AM	#2
hm diyAudio Member Join Date: Feb 2004 Location: near Hamburg Germany	Hello, look the data below 800 Hz it needs ~5 dB +, and this is a measurement on a IEC norm baffle, a 25-30 cm wide box is worth than that. http://www.spectrumaudio.de/ (Fostextabelle) Xmax only 0,6 there is compression near 0,5 watt ~70 Hz Up to 800 Hz you can´t get a basshorn, only 200 Hz. My solution would be The small Schallmei sat and a sub, or the SAXOPHON. 1 point is such drivers need a listening distance of more than 4m then they sound good, in near field ~2 m most the time the amp can´t reproduce normal levels, because only 0,05 watt is needed, not every amp is fully there at 0,0... __________________ http://www.hm-moreart.de

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5th September 2007, 10:15 PM	#3
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	While in principle I agree with Horst to an extent, I don't think its the lack of LF or lower mids that's your problem here. Looking at the ES-R data, even with the ludicrously heavily smoothed Fostex graph, the heavy peak at ~2.8KHz is very obvious, and I'd put money on it being more severe in practice than it appears on that mediocre plot. Even boosting LF sensitivity up to the driver's nominal by whatever method floats your boat, you're still going to have problems, because that peak is slap-bang in the region where our ears are most sensitive. Two words: phase plugs. They'll take that peak right down, and smooth out the midrange & treble while allowing you to hear more detail, when before, you were just wincing. www.planet10-hifi.com

16th September 2007, 11:02 AM	#4
ConExp diyAudio Member Join Date: Jul 2006	Thank you both. Scottmoose, do you have a simulation of the diaphragm excursion as a function of frequency for the design presented in Godsilla’s site? Thanks My specific parameters are as follow: L=387cm Zdriver=83cm Mouth area=908cm^2

16th September 2007, 11:13 AM	#5
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Not to hand. If I have time, I'll re-run the sim & check. Where will they be positioned? The mouth isn't a mouth; it's just a terminus; the room, and it's walls form the mouth you see.