Tweakers' Asylum

Magnepan MGII distortion

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mssonni1

I have a pair of these, and one has a buzz sound in it with certain frequencies. Used to be just with lute strings, and that sort of thing, but it's gaining a wider range. Anyone know what to do about it? Thanks!

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Try posting on the MUG - SHIF 10:39:40 01/01/05 (0)
A dedicated AA forum for panheads like me.
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Re: Magnepan MGII distortion - croft 07:59:12 01/01/05 (1)
HI,
I also had Magnepans (SMGB + 2.5QR).
I think your problem may be a couple of things.
Firstly the most probable may be that one of the robbon elements has come loose and needs repair.
I have seen this performed and depending on which model,It can be a liitle tricky.Some Magiie Ribbons are as thin or thinner than a strand of human hair.
Magnepan supply a specialist type of adhesive just for this job.
The riboon itself can come loose instead of being taught which would explain the distortion, Which i have also heard in the past as a faint buzzing noise at the extremes.
A freind managed to repair his Maggies and i will email him and ask him how he did it.
I now own some Decca kelly ribbon horn speakers which are godd but i always regeret selling the maggies,They looked so cool and futuristic.
Another cause may be the panel is being underdriven,I just about got away with 20 whatts of valve amplification using a very large 14 valve pre amp (pics in gallery section under CROFT) which had huge output gain for independant left and right drive.
When i switched to an ARC SP9 the sound litteraly halfed and the maggies lost a huge amount.
This may be an issue but i am not 100% shure,Please forgive me if you alredy know this.
Will ask a pal about the repair,
Be back soon,
Ian (uk).
- Re: Magnepan MGII distortion - Russ K 19:13:18 01/03/05 (0)
  you can get the OEM elastomer kit directly from Magnepan. if the wires were burned or broken you would have no sound. do this fix ASAP as your board needs refurbrishing and the wires will separate. if this happens the repair will be a nightmare and be costly.
  MGII's are not a true ribbon speaker, but a magnetic field planar. i still use my 30 yr olds as a standard to judge all others.
  congratulations on owning a legend in speaker technoledgy.
  Regards,
  Russ

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