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Old 24th May 2012, 10:52 PM   #1
tinitus is offline tinitus  Europe
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Default combine active xo and parametric eq

anyone tried it ?
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Old 25th May 2012, 09:35 AM   #2
tinitus is offline tinitus  Europe
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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 ?
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Old 25th May 2012, 01:03 PM   #3
AndrewT is offline AndrewT  Scotland
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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
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Old 25th May 2012, 07:43 PM   #4
tinitus is offline tinitus  Europe
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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
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Old 26th May 2012, 05:04 AM   #5
tinitus is offline tinitus  Europe
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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
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Old 26th May 2012, 07:04 AM   #6
tinitus is offline tinitus  Europe
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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
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Old 26th May 2012, 07:49 AM   #7
tinitus is offline tinitus  Europe
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I sent a note(mail) to ESP about this
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Old 26th May 2012, 10:36 AM   #8
AndrewT is offline AndrewT  Scotland
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Read the Linkwitz site for first hand information on the many EQs available for speaker crossovers and effects.
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Old 26th May 2012, 12:54 PM   #9
tinitus is offline tinitus  Europe
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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
Attached Images
File Type: gif ESP EQ.gif (5.2 KB, 299 views)
File Type: gif ESP project 09 xo.gif (7.4 KB, 296 views)
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Old 26th May 2012, 02:36 PM   #10
tinitus is offline tinitus  Europe
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well, I remember sometimes reading about active xo modules, they say may also be configured like ....

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