magnepan tweeter transplant

Ang · 22nd May 2007, 02:58 PM

I'm looking for a good line of tweeters to improve the highend and dispersion of an rd75. There aren't a lot of options out there so... Are the tweeters in some of the cheaper magnepans (SMGa, MMG) amenable to being transplanted?

sam9 · 22nd May 2007, 03:08 PM

A- Magnepans are not noted for broad off axis response. I say this as an owner.

B- The individual elements on Magnepans are not really removable from the panel. I think you would just get a sheet of mylar with glued on aluminum wires. I'm not sure what would become of the magnets. If you managed not to damage them you would still have the problem of re-mountining them.

Ang · 22nd May 2007, 03:24 PM

okay - thanks for the info! Looks like I need to build a ribbon.

Ouroboros · 22nd May 2007, 03:32 PM

My MG2.5R speakers have wonderful horizontal dispersion but are truly dreadful in the vertical direction. This isn't surprising as they have a long, thin ribbon which will give a very lobed response vertically. The ribbon is damaged in one of the speakers and I have been considering what I could do to replace the ribbons with a conventional tweeters. Ribbons may be wonderful for transient response but I can't really live with speakers that sound totally different when you're standing up compared with sitting down!

Ang · 22nd May 2007, 03:36 PM

in reading around it seems the 2.5 may have unusually good horizontal dispersion vs other maggies. Is this the case?

Ang · 22nd May 2007, 06:19 PM

apparently Radio Shack produced some tweeter in the Linaeum speakers that might work.

Anyone know if these are still available?

sam9 · 23rd May 2007, 03:43 AM

Quote:

apparently Radio Shack produced some tweeter in the Linaeum speakers that might work.

I don't think so. They had some with the RCA lable a few years back that were somewhat similar.

GRollins · 23rd May 2007, 04:34 AM

Assuming that you're talking about the Bohlender-Graebner RD-75 drivers, I removed the ribbons from my old Magneplanar Tympani IVs and used them with the RD-75s. First order crossover at 5kHz. Works very nicely, indeed.
The ribbons are easy to remove, but you'll have to get the right model.

Grey

Ang · 23rd May 2007, 11:15 PM

Hi Greg - thanks - pics of your system were what inspired me to try this to begin with.

GRollins · 24th May 2007, 12:07 AM

Pictures of my system? Where?

Grey

22nd May 2007, 02:58 PM	#1
Ang diyAudio Member Join Date: Feb 2006 Location: Pittsburgh	magnepan tweeter transplant I'm looking for a good line of tweeters to improve the highend and dispersion of an rd75. There aren't a lot of options out there so... Are the tweeters in some of the cheaper magnepans (SMGa, MMG) amenable to being transplanted?

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22nd May 2007, 03:08 PM	#2
sam9 diyAudio Member Join Date: Jun 2002 Location: Left Coast	A- Magnepans are not noted for broad off axis response. I say this as an owner. B- The individual elements on Magnepans are not really removable from the panel. I think you would just get a sheet of mylar with glued on aluminum wires. I'm not sure what would become of the magnets. If you managed not to damage them you would still have the problem of re-mountining them.

22nd May 2007, 03:24 PM	#3
Ang diyAudio Member Join Date: Feb 2006 Location: Pittsburgh	okay - thanks for the info! Looks like I need to build a ribbon.

22nd May 2007, 03:32 PM	#4
Ouroboros diyAudio Member Join Date: Dec 2003 Location: Nottingham UK	My MG2.5R speakers have wonderful horizontal dispersion but are truly dreadful in the vertical direction. This isn't surprising as they have a long, thin ribbon which will give a very lobed response vertically. The ribbon is damaged in one of the speakers and I have been considering what I could do to replace the ribbons with a conventional tweeters. Ribbons may be wonderful for transient response but I can't really live with speakers that sound totally different when you're standing up compared with sitting down!

22nd May 2007, 03:36 PM	#5
Ang diyAudio Member Join Date: Feb 2006 Location: Pittsburgh	in reading around it seems the 2.5 may have unusually good horizontal dispersion vs other maggies. Is this the case?

22nd May 2007, 06:19 PM	#6
Ang diyAudio Member Join Date: Feb 2006 Location: Pittsburgh	apparently Radio Shack produced some tweeter in the Linaeum speakers that might work. Anyone know if these are still available?

23rd May 2007, 04:34 AM	#8
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	Assuming that you're talking about the Bohlender-Graebner RD-75 drivers, I removed the ribbons from my old Magneplanar Tympani IVs and used them with the RD-75s. First order crossover at 5kHz. Works very nicely, indeed. The ribbons are easy to remove, but you'll have to get the right model. Grey

23rd May 2007, 11:15 PM	#9
Ang diyAudio Member Join Date: Feb 2006 Location: Pittsburgh	Hi Greg - thanks - pics of your system were what inspired me to try this to begin with.

24th May 2007, 12:07 AM	#10
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	Pictures of my system? Where? Grey

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