FE206E, improving the freq. responce

Flemming J P · 26th October 2004, 08:33 AM

I have coated my FE206E in the hope of reducing the peak centered at 2.7khz.

Well it made no difference to that peak, but it reduced the minor peak centered at 900 hz which did improved the sound quiet a bit.

So my FE206E still have a small peak at 550hz and the large one at 2.7khz.

Does anyone have an idea how to reduce the peak at 2.7khz?

Nelson Pass · 26th October 2004, 10:11 PM

My own measurements show only a small peak at 2.7 KHz,
not much taller than surrounding ones. RLC networks with the
R, L and C in parallel and the result in series with the speaker
is a popular way of reducing peaks in Fostex speakers. You
can see my data in the current source amp/speaker article on

www.firstwatt.com

which has a response and impedance curve. Modeling up a
network for it would not be too difficult.

check out

http://www.quarter-wave.com/General/BSC_Variable.pdf

zobsky · 27th October 2004, 06:28 AM

i still think the most worthwhile tweak i made to the smaller cousin of the 206e (the 166e) was adding a "socket" phase plug a la Steve Deckert. It subtly (subjectively) reduces peaking but improves off axis response and makes the driver more listenable

See pic (the powdery stuff is dried up damar)

Flemming J P · 27th October 2004, 07:55 AM

yes the socket phase plug does help, but doesn't remove the problem totaly.

26th October 2004, 08:33 AM	#1
Flemming J P diyAudio Member Join Date: Oct 2001 Location: Sweden	FE206E, improving the freq. responce I have coated my FE206E in the hope of reducing the peak centered at 2.7khz. Well it made no difference to that peak, but it reduced the minor peak centered at 900 hz which did improved the sound quiet a bit. So my FE206E still have a small peak at 550hz and the large one at 2.7khz. Does anyone have an idea how to reduce the peak at 2.7khz?

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26th October 2004, 10:11 PM	#2
Nelson Pass The one and only Join Date: Mar 2001	My own measurements show only a small peak at 2.7 KHz, not much taller than surrounding ones. RLC networks with the R, L and C in parallel and the result in series with the speaker is a popular way of reducing peaks in Fostex speakers. You can see my data in the current source amp/speaker article on www.firstwatt.com which has a response and impedance curve. Modeling up a network for it would not be too difficult. check out http://www.quarter-wave.com/General/BSC_Variable.pdf

27th October 2004, 07:55 AM	#4
Flemming J P diyAudio Member Join Date: Oct 2001 Location: Sweden	yes the socket phase plug does help, but doesn't remove the problem totaly.