Magneplanar MG-IIIA Crossover Schematic

sjdemark · 6th November 2009, 05:24 AM

Hi,
I just bought a pair of Maggie MG-IIIa's, but they are missing the external crossovers. If someone was willing to share the schematic for the IIIa's, I would be very grateful! I spent an evening scouring the internet, but could not find one for this model. Apparently, there used to be one posted on Geocities, but that site is down now.

Or if anyone has a pair of MG-IIIa crossovers for sale, I would be interested in those also.

Thanks!

john65b · 6th November 2009, 12:06 PM

Hey, I had and loved my MGIIIa, until I heard and bought my Tympani IVa's. I will never get rid of my Tymp's.

Anyway, I know I have the MGIIIa schematic on another computer, and they were really similar to the Tympani's. I have attached the Tympani external schematic.

I rebuilt my Tymp crossovers and was amazed on how well it worked out (someone offered me $350 for the original crossovers). I used simple and relatively cheap Wima caps for the 10uf and 68uf caps, as they sounded much better than expensive Sonicaps and other higher end boutique caps...

sjdemark · 6th November 2009, 01:13 PM

Thanks you for the info! Do you know what the differences are between the IIIa's and the Tympanis and the values of the crossover components for the IIIa's? I'm assuming there are some differences, because I noticed that the Tympanis have a low pass crossover point of 250hz, and I believe the IIIa's cross over at 300hz.

john65b · 6th November 2009, 03:19 PM

I am still looking for those MGIIIa schematics...I know i have them somewhere...been a while and had a cross country move in there somewhere...

I know I have a DCX2496 digital crossover somewhere in my closet that I was going to use to biamp the MGIIIa. I decided to go in a different direction and then went to the Tympanis...

Atom666 · 6th November 2009, 03:25 PM

MUG Tweaks Has what you are looking for
Andrew

Steve Dunlap · 6th November 2009, 03:26 PM

You might find this helpful.

http://www.integracoustics.com/MUG/MUG/tweaks/AndyR/

john65b · 6th November 2009, 04:17 PM

Poster is looking for the original schematic. The schematic by the stranger on MUG is dead as he initially posted.

Unless you are able to get to it?

Steve Dunlap · 6th November 2009, 05:59 PM

The link I posted works for me.

Atom666 · 6th November 2009, 08:06 PM

http://www.integracoustics.com/MUG/MUG/tweaks/AndyR/ Includes a schematic with original component values and optimized values by Andy R

Steve Dunlap · 6th November 2009, 08:30 PM

That is the same link I posted, and it does work.

6th November 2009, 05:24 AM	#1
sjdemark diyAudio Member Join Date: May 2008	Magneplanar MG-IIIA Crossover Schematic Hi, I just bought a pair of Maggie MG-IIIa's, but they are missing the external crossovers. If someone was willing to share the schematic for the IIIa's, I would be very grateful! I spent an evening scouring the internet, but could not find one for this model. Apparently, there used to be one posted on Geocities, but that site is down now. Or if anyone has a pair of MG-IIIa crossovers for sale, I would be interested in those also. Thanks!

6th November 2009, 03:26 PM	#6
Steve Dunlap diyAudio Member Join Date: Sep 2008 Location: Here	You might find this helpful. http://www.integracoustics.com/MUG/MUG/tweaks/AndyR/ __________________ http://dunlapaudio.x10hosting.com/

6th November 2009, 05:59 PM	#8
Steve Dunlap diyAudio Member Join Date: Sep 2008 Location: Here	The link I posted works for me. __________________ http://dunlapaudio.x10hosting.com/

6th November 2009, 08:30 PM	#10
Steve Dunlap diyAudio Member Join Date: Sep 2008 Location: Here	That is the same link I posted, and it does work. __________________ http://dunlapaudio.x10hosting.com/

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6th November 2009, 01:13 PM	#3
sjdemark diyAudio Member Join Date: May 2008	Thanks you for the info! Do you know what the differences are between the IIIa's and the Tympanis and the values of the crossover components for the IIIa's? I'm assuming there are some differences, because I noticed that the Tympanis have a low pass crossover point of 250hz, and I believe the IIIa's cross over at 300hz.

6th November 2009, 03:19 PM	#4
john65b diyAudio Member Join Date: Jan 2005 Location: Chicago	I am still looking for those MGIIIa schematics...I know i have them somewhere...been a while and had a cross country move in there somewhere... I know I have a DCX2496 digital crossover somewhere in my closet that I was going to use to biamp the MGIIIa. I decided to go in a different direction and then went to the Tympanis...

6th November 2009, 03:25 PM	#5
Atom666 diyAudio Member Join Date: Oct 2005 Location: Toronto, Canada	MUG Tweaks Has what you are looking for Andrew

6th November 2009, 04:17 PM	#7
john65b diyAudio Member Join Date: Jan 2005 Location: Chicago	Poster is looking for the original schematic. The schematic by the stranger on MUG is dead as he initially posted. Unless you are able to get to it?

6th November 2009, 08:06 PM	#9
Atom666 diyAudio Member Join Date: Oct 2005 Location: Toronto, Canada	http://www.integracoustics.com/MUG/MUG/tweaks/AndyR/ Includes a schematic with original component values and optimized values by Andy R

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