Speaker Asylum

Yes, the newer models use foil glued to the mylar instead of wires, called "quasi-ribbon". It's more reliable.

75.177.35.201

MWE

In Reply to: RE: It's all about reducing mass posted by John Elison on December 23, 2024 at 14:58:49

It's used in the bass and midrange sections of the three-way models, and mid/bass and tweeter sections of the two-way models.

Mark in NC
"The thought that life could be better is woven indelibly into our hearts and our brains" -Paul Simon

Follow Ups:

That sounds good to me... - John Elison 18:09:11 12/23/24 (2)
Although, I don't think the term "quasi-ribbon" refers to foil conductors instead of wire conductors. I think it simply means that the diaphragm has conductors glued to it, instead of being a true ribbon. My Mini Maggies have wire glued onto the mylar diaphragms, yet Magnepan still refers to them as quasi-ribbon drivers. Only the tweeter is a true ribbon driver.

Nevertheless, I'm glad they switched from wire to foil, because not only is it probably more reliable, it probably has lower mass, too. I just hope it can still handle the current as well as wire. It would be nice if they used silver foil.

Thanks!
- RE: That sounds good to me... - MWE 06:00:12 12/24/24 (1)
  No, the "QR" designation applies specifically to the method of using foil glued to the mylar instead of wires. They came up with the term to differentiate it from the older wire system that was used on both bass and tweeter sections previously. The Magnepan website has explained this since its introduction of the QR technology.
  The foil, to the best of my knowledge, doesn't have significantly lower mass than the wires; they kept it the same because the impedance needed to stay the same, but it probably has a bit lower distortion because the foil is adhered to a larger area of the Mylar than the wires are.
  I've read discussion in the past on various forums about using other metals as conductors, but the consensus has generally been that aluminum has the best combined mass/conductivity characteristics.
  I've been a Maggie guy since 1998, and it's been head-spinning to try to keep up with all of their changes in methods.
  
  Mark in NC
  "The thought that life could be better is woven indelibly into our hearts and our brains" -Paul Simon
  - https://www.audioasylum.com/cgi/t.mpl?f=mug&m=178152 (Open in New Window)
  Edits: 12/24/24 12/24/24
  - Thanks for the information! I appreciate it. /nt\ - John Elison 12:06:23 12/24/24 (0)

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