combine active xo and parametric eq

tinitus · 24th May 2012, 10:52 PM

anyone tried it ?

tinitus · 25th May 2012, 09:35 AM

ehh, the parametric would be a notch filter

on second thought, make it active xo, with 'reversed' graphic EQ, and optional parametric notch/peak filters

the 'reverse' trick
to use tweeter attenuation for the woofer low pass filters
and using a bass attenuation with the high pass filters

surely this must have been done before ?

AndrewT · 25th May 2012, 01:03 PM

The old Threads at
MOX Active Crossover II Gain Adjustment
or
JFET follower (Xenover) with MOX like setup?
or
MOX - active crossover
or
MOX active crossover buy
or
MOX builder’s thread

tinitus · 25th May 2012, 07:43 PM

a flexible active xo, I guess there's a first time for everything

is it because those who design the electronics have very little knowledge about speakers
and speaker designers, well.....

but with new digital technology, maybe a bit late for this
but i still intend to try a figure it out

tinitus · 26th May 2012, 05:04 AM

well, its been said before, there ain't no 12db Linkwitz Riley filter

12dB / Octave Linkwitz Riley Crossover

http://sound.westhost.com/project78.htm

I wonder how other 12db active LR filters look like

tinitus · 26th May 2012, 07:04 AM

hang on

ehh, Elliot use half his 3way 24db LR filter for the 12db LR project

maybe we could simple use the other half, so that each slope will have their own dedicated EQ

I'm in over my head here

and think I better let this one go now

tinitus · 26th May 2012, 07:49 AM

I sent a note(mail) to ESP about this

AndrewT · 26th May 2012, 10:36 AM

Read the Linkwitz site for first hand information on the many EQs available for speaker crossovers and effects.

tinitus · 26th May 2012, 12:54 PM

yeah, I know its well described by Linkwitz
and wont hurt to read it again, and again
tho Im not very good at reading, and calculations even worse
Im not very well educated

Im looking at this schematic from ESP site, project 28
Parametric and Sub-Woofer Equaliser

and his project 09, crossover
Linkwitz-Riley Electronic Crossover

the same board is used for the 12db LR filter
they both look very similar to me

tinitus · 26th May 2012, 02:36 PM

well, I remember sometimes reading about active xo modules, they say may also be configured like ....

never thought much about it before, but now...?

24th May 2012, 10:52 PM	#1
tinitus diyAudio Moderator Join Date: Nov 2005	combine active xo and parametric eq anyone tried it ?

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25th May 2012, 09:35 AM	#2
tinitus diyAudio Moderator Join Date: Nov 2005	ehh, the parametric would be a notch filter on second thought, make it active xo, with 'reversed' graphic EQ, and optional parametric notch/peak filters the 'reverse' trick to use tweeter attenuation for the woofer low pass filters and using a bass attenuation with the high pass filters surely this must have been done before ?

25th May 2012, 01:03 PM	#3
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	The old Threads at MOX Active Crossover II Gain Adjustment or JFET follower (Xenover) with MOX like setup? or MOX - active crossover or MOX active crossover buy or MOX builder’s thread

25th May 2012, 07:43 PM	#4
tinitus diyAudio Moderator Join Date: Nov 2005	a flexible active xo, I guess there's a first time for everything is it because those who design the electronics have very little knowledge about speakers and speaker designers, well..... but with new digital technology, maybe a bit late for this but i still intend to try a figure it out

26th May 2012, 05:04 AM	#5
tinitus diyAudio Moderator Join Date: Nov 2005	well, its been said before, there ain't no 12db Linkwitz Riley filter 12dB / Octave Linkwitz Riley Crossover http://sound.westhost.com/project78.htm I wonder how other 12db active LR filters look like

26th May 2012, 07:04 AM	#6
tinitus diyAudio Moderator Join Date: Nov 2005	hang on ehh, Elliot use half his 3way 24db LR filter for the 12db LR project maybe we could simple use the other half, so that each slope will have their own dedicated EQ I'm in over my head here and think I better let this one go now

26th May 2012, 07:49 AM	#7
tinitus diyAudio Moderator Join Date: Nov 2005	I sent a note(mail) to ESP about this

26th May 2012, 10:36 AM	#8
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Read the Linkwitz site for first hand information on the many EQs available for speaker crossovers and effects.

26th May 2012, 02:36 PM	#10
tinitus diyAudio Moderator Join Date: Nov 2005	well, I remember sometimes reading about active xo modules, they say may also be configured like .... never thought much about it before, but now...?