R/E/P Community
R/E/P => Klaus Heyne's Mic Lab => Topic started by: Vertigorecording on July 12, 2021, 02:52:20 PM
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Hello Everyone,
Does anyone know where I can purchase a replacement M49 inner rubber suspension piece to fix one with a badly deteriorated
original rubber piece? Thanks in advance.
-Charlie Bolois
Vertigo Recording Services
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Hello Charlie, I assume you mean the lower amp suspension mounted in the bottom bell, not the foam buffer embedded in the basket.
Two options:
1. James Gangwer ([email protected]) had a few of those fabricated a while ago.
2. Cut yourself a new one using an original as template. Pay attention to rubber density (important, to find the middle ground between shock absorption and the positional stability for the amp) and thickness.
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Thanks Klaus,
Yes I was referring to the lower amp suspension, mounted in the bottom bell. Not the foam upper piece.
I will reach out to James. If that doesn't work out, I had carefully traced out a new replacement one that I got a few
years back so I might have to go that route. I would have to experiment with procuring the correct rubber and all of that
so that may be time consuming.
Thanks again for your helpful suggestions.
-Charlie Bolois
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I ordered a 6"x6" piece of 1/8" thick neoprene rubber sheet from McMaster Carr. Part number 1370N15, Durometer 30A.
I actually ordered three different durometer types but the 30A was just right, the others too stiff.
The disc is 65.5mm in diameter with a 25.5mm hole cut in the center. Make a 3mm hole about 9mm from any outside edge and then cut a slot to it, from outside to the 3mm hole but no farther. It works really well.
-Charlie Bolois
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Excellent advice and resource. Thank you!
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Vertigorecording - thank you for the details on the McMaster Carr part number. After a year of use, do you find that the 30A durometer still provides enough stiffness to support the amp unit/capsule in the correct position when you hang the mic upside down? I just installed the 30A and found that it would sag enough to let the capsule get very very close to the top of the grill. I'm considering trying 40A. I still have the original rubber support ring and it suffered the same issue (that's why I'm trying to replace it) The original material is much stiffer than the 1/8" - 30A sheet from McMaster Carr.
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Alternative: buy the part for the new M49V from Neumann. It is identical with the original in fit and quality.
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#protips
Thanks, Klaus!
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Vertigorecording - thank you for the details on the McMaster Carr part number. After a year of use, do you find that the 30A durometer still provides enough stiffness to support the amp unit/capsule in the correct position when you hang the mic upside down? I just installed the 30A and found that it would sag enough to let the capsule get very very close to the top of the grill. I'm considering trying 40A. I still have the original rubber support ring and it suffered the same issue (that's why I'm trying to replace it) The original material is much stiffer than the 1/8" - 30A sheet from McMaster Carr.
Good question, I don't actually own the mic but that is a concern!