Help taming some frequencys

Lazi · 13th March 2007, 11:26 AM

I own a pair of MA GR20.Many like their forward voices , but I have a problem.I am extrasensitive for sibilance , and the only way I can get rid of it is by cutting -6 or even -9 db from 7 and 10kHz.Now because I don't want to use an EQ , what I want to know is can I build some filter to conect the tweeter to it so I tame the sibilance , but only in that frequency range.
I already tried making acustical panel for my room , that helped but not too much.The amplifier is Creek 5350SE and CD is Creek MK2.So please if someone can help I'll apreciate.
Thanx guys!

PS Sorry if is hard to understand what I write , but i'm from Europe.I am a total beginner in the electronical part.

Lazi · 13th March 2007, 12:00 PM

All I know is I think I need a Notch filter , but that's about it.I plan a DIY with Manger , witch I've heard is much more layed back than regular speakers.A ZeroBox 109 for my 150square feet I think will be the best.

LaMa · 13th March 2007, 08:30 PM

What is a MA gr20 speaker, is it magnepan or monitor audio, please specify, in that case I can help more specific. Generally speaking you have to alter the xo filter of your speaker in order to change the response. However, you have to have some measurement capability if you want to do some serious efforts.

Lazi · 14th March 2007, 07:40 AM

The speakers are Monitor Audio , sorry for the confusion.I'm trying to obtain masurement equipment , but what I tell you about sibilance is clear.I don't care about the speakers liniarity if they hurt my ears.So trought a equalizer I heard a good sound when the 7,10kHz were down by 6db or even more.So that is what I need to obtain in order to enjoy my listennig.
In the meantime I think the solution is a parallel notch filter , and the values I came up so far are :
C = 3.73-3.9 uF, L = 0.09-0.1 mH si R = 7-8.5
Because MA are bi-wireble , I can connect this filter only for the mid-upper speakers , just before their crossover.
So if anyone can confirm this values , and the entire ideea , I will very much appreciate.thanks

sreten · 14th March 2007, 01:02 PM

Hi, your values are correct,

/sreten.

Cal Weldon · 14th March 2007, 04:07 PM

The values may be correct but aren't you supposed to notch after the XO?

sreten · 14th March 2007, 04:26 PM

Hi,

Its a parallel LCR circuit placed in series.

Before / after the treble c/o will not matter too much.

/sreten.

13th March 2007, 11:26 AM	#1
Lazi diyAudio Member Join Date: Mar 2007	Help taming some frequency's I own a pair of MA GR20.Many like their forward voices , but I have a problem.I am extrasensitive for sibilance , and the only way I can get rid of it is by cutting -6 or even -9 db from 7 and 10kHz.Now because I don't want to use an EQ , what I want to know is can I build some filter to conect the tweeter to it so I tame the sibilance , but only in that frequency range. I already tried making acustical panel for my room , that helped but not too much.The amplifier is Creek 5350SE and CD is Creek MK2.So please if someone can help I'll apreciate. Thanx guys! PS Sorry if is hard to understand what I write , but i'm from Europe.I am a total beginner in the electronical part.

14th March 2007, 04:07 PM	#6
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	The values may be correct but aren't you supposed to notch after the XO? __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

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13th March 2007, 12:00 PM	#2
Lazi diyAudio Member Join Date: Mar 2007	All I know is I think I need a Notch filter , but that's about it.I plan a DIY with Manger , witch I've heard is much more layed back than regular speakers.A ZeroBox 109 for my 150square feet I think will be the best.

13th March 2007, 08:30 PM	#3
LaMa diyAudio Member Join Date: Sep 2002 Location: NL	What is a MA gr20 speaker, is it magnepan or monitor audio, please specify, in that case I can help more specific. Generally speaking you have to alter the xo filter of your speaker in order to change the response. However, you have to have some measurement capability if you want to do some serious efforts.

14th March 2007, 07:40 AM	#4
Lazi diyAudio Member Join Date: Mar 2007	The speakers are Monitor Audio , sorry for the confusion.I'm trying to obtain masurement equipment , but what I tell you about sibilance is clear.I don't care about the speakers liniarity if they hurt my ears.So trought a equalizer I heard a good sound when the 7,10kHz were down by 6db or even more.So that is what I need to obtain in order to enjoy my listennig. In the meantime I think the solution is a parallel notch filter , and the values I came up so far are : C = 3.73-3.9 uF, L = 0.09-0.1 mH si R = 7-8.5 Because MA are bi-wireble , I can connect this filter only for the mid-upper speakers , just before their crossover. So if anyone can confirm this values , and the entire ideea , I will very much appreciate.thanks

14th March 2007, 01:02 PM	#5
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, your values are correct, /sreten.

14th March 2007, 04:26 PM	#7
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, Its a parallel LCR circuit placed in series. Before / after the treble c/o will not matter too much. /sreten.

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