- Posted by josh358 (P) on October 22, 2010 at 08:38:45
In Reply to: RE: Magnepan MG-1.7: casual impressions posted by tyu on October 21, 2010 at 13:46:40
AFAIK, the mass of aluminum wire and aluminum foil is the same. That would be true for a conductor of a given length, anyway, for a given impedance (approximately 4 ohms). Copper wire is presumably going to be more massive than foil or aluminum wire, again, for the same parameters (wire length and impedance). That will make the speaker less efficient.
Follow Ups:
- RE: Magnepan MG-1.7: casual impressions - DrChaos 23:05:45 10/22/10
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- In Reply to: RE: Magnepan MG-1.7: casual impressions posted by josh358 on October 22, 2010 at 08:38:45
They can probably save on some mass of "glue".
Even if the sound isn't improved, eliminating long term reliability & delamination by going to QR process is a win.
Has anybody reported age/humidity/heat induced delamination on a QR section of their driver?
- RE: Magnepan MG-1.7: casual impressions - ocezam 07:12:04 10/23/10
(0)
- In Reply to: RE: Magnepan MG-1.7: casual impressions posted by DrChaos on October 22, 2010 at 23:05:45
I'll be the third person to wonder aloud on the delam issue with the foil. I know on my 1.6's The wire was coming up in many, many places, but the tweeters were still completely stuck down.
When the 1.7's came out I wondered, this time quietly to myself, weather a much better resistance to delam might be one of the reasons Magnepan developed this speaker.
- RE: Magnepan MG-1.7: casual impressions - josh358 05:43:09 10/23/10
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- In Reply to: RE: Magnepan MG-1.7: casual impressions posted by DrChaos on October 22, 2010 at 23:05:45
Do you know how the QR ribbon is glued? My understanding is that the spray adhesive merely tacks down the wire and that the Milloxane polyurethane glue is what actually holds it in place. But when I looked at my QR driver it didn't seem to have Milloxane on the foil.
The Milloxane also apparently damps the diaphragm. Maybe that's not necessary in the quasi-ribbon woofers because the aluminum sandwich provides superior damping? My QR tweeter seems to have much better damping than the wire woofers, judging by the tapping test.
- RE: Magnepan MG-1.7: casual impressions - ocezam 07:12:04 10/23/10
(0)
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