Monacor SP200X help!

Rabbit · 29th June 2009, 06:29 PM

Hello to all speaker builders.

First of all, I would like to introduce myself. Coming from croatia, built a couple of twoo way speakers following projects from the net.
My last project is monacor sp200x in app. 50 liter box tuned to 40 Hz.
Since I do not know much about crossovers, zobel, notch filter, would appreciate if someone help me what do I need to linearize response of monacors in this box because mids are pesky and flagrant.

Here's a pic.

Scottmoose · 29th June 2009, 07:41 PM

You might want to use something like this as a guide / starting point http://www.troelsgravesen.dk/SP200.htm

Rabbit · 29th June 2009, 08:10 PM

Thanks for your answer, already have read this project even before I bought the drivers.
But I wanted to keep it simple because I thought it would be more opened and linear, considernig the potentiality of driver to the 12-15 k, but this sentence confused me:

".... It's possible to add a series notch filter to smooth the response in the treble region and 0.82 mH\\2.5 uF\\10 ohms (all in parallel) make a nice and smooth response from 1-10 kHz..."

I must confess that I'm really new in this domain, so would this notch filter resolve awful mids and higher bass 'cause vocals are tearing my ears.

I

Scottmoose · 29th June 2009, 10:12 PM

There's only so much you can do with a cheap driver, but yes, that should help, although depending on your tweeter you'll probably have to rework it's XO to match.

JSRUK · 29th June 2009, 11:34 PM

why don't you try removing the whizzer cone as Troels suggests in his build and add a phase plug..

Piek · 30th June 2009, 06:27 AM

Quote:

Originally posted by JSRUK
why don't you try removing the whizzer cone as Troels suggests in his build and add a phase plug..

Because he is running it fullrange unlike troels?

-Micha

Leglandu · 1st July 2009, 10:53 AM

http://www.cinetson.org/phpBB3/haut-...nde-t8512.html

they filtered with 1.2 mH + 12 Ohm + 3 uF and added (glue) a SPM90 in opposite phase, seems to add some energy in the highs...

http://www.monacor.de/typo3/index.ph...ukatid=&brand=

Rabbit · 2nd July 2009, 10:07 PM

I put 0.82mH/10Ù/2.7µF as a serial notch filter, and the beam in mids disappeared...just as it was said in the above link, "..smooth response from 1-10 kHz...".

Thanks to all people who tried to help...

1st July 2009, 10:53 AM	#7
Leglandu diyAudio Member Join Date: Dec 2004 Location: Parisian suburbs	Perhaps this can help ? http://www.cinetson.org/phpBB3/haut-...nde-t8512.html they filtered with 1.2 mH + 12 Ohm + 3 uF and added (glue) a SPM90 in opposite phase, seems to add some energy in the highs... http://www.monacor.de/typo3/index.ph...ukatid=&brand=

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29th June 2009, 07:41 PM	#2
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	You might want to use something like this as a guide / starting point http://www.troelsgravesen.dk/SP200.htm

29th June 2009, 08:10 PM	#3
Rabbit diyAudio Member Join Date: Aug 2008	Thanks for your answer, already have read this project even before I bought the drivers. But I wanted to keep it simple because I thought it would be more opened and linear, considernig the potentiality of driver to the 12-15 k, but this sentence confused me: ".... It's possible to add a series notch filter to smooth the response in the treble region and 0.82 mH\\2.5 uF\\10 ohms (all in parallel) make a nice and smooth response from 1-10 kHz..." I must confess that I'm really new in this domain, so would this notch filter resolve awful mids and higher bass 'cause vocals are tearing my ears. I

29th June 2009, 10:12 PM	#4
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	There's only so much you can do with a cheap driver, but yes, that should help, although depending on your tweeter you'll probably have to rework it's XO to match.

29th June 2009, 11:34 PM	#5
JSRUK diyAudio Member Join Date: Jun 2009	why don't you try removing the whizzer cone as Troels suggests in his build and add a phase plug..

2nd July 2009, 10:07 PM	#8
Rabbit diyAudio Member Join Date: Aug 2008	I put 0.82mH/10Ù/2.7µF as a serial notch filter, and the beam in mids disappeared...just as it was said in the above link, "..smooth response from 1-10 kHz...". Thanks to all people who tried to help...

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