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C414 B/ULS grills-how to damp

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C414 B/ULS grills-how to damp

Postby Jeraldo » Thu May 02, 2013 2:35 am

I have an old pair of C414 B/ULS, and even when new 20 years or more? ago, the grills always "rang" when tapped, even when the mic body was tapped. I was never able to conclude if they rang when in the presence of moderate to high SPL.

Anyway, they are ringing even more than in the past, and one has a little mechanical buzz, probably from a little distance from the grill to the top bar.

Does anyone have an easy DIY solution to deaden these grills? It needn't be cosmetically desirable. I haven't disassembled the mic's, and would rather not.

Oddly enough, these things seem to have improved with age. Much less grit and tizz.

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Re: C414 B/ULS grills-how to damp

Postby Matt Houghton » Fri May 03, 2013 8:24 am

They're a nice pair of mics and a pair doesn't come cheap, and if they're not working as they should they're really worth getting properly repaired.
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Re: C414 B/ULS grills-how to damp

Postby tacitus » Fri May 03, 2013 8:39 am

+1 on that. I've hankered after a pair for years and never got the money together at a time when I was doing enough recording to justify it. Even now, I think I'd probably prefer the older ULS to the new XLS. I can't say I was particularly looking, but I never noticed a flood of ULSs on the market as people 'upgraded' to the new ones. So definitely a keeper and really worth investing in a proper overhaul. I've seen lots of 414s over the years, and I can't say I've noticed any modded ones, so the damping probably isn't an issue - or maybe yours is just a bit off in some way. In which case a thorough look by a pro repairer would be money well spent.
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Re: C414 B/ULS grills-how to damp

Postby Hugh Robjohns » Fri May 03, 2013 9:13 am

I think this is a fairly common problem with relatively elderly versions of the 414, and is to do with the way the grille is attached to the ring around the top of the mic body. I've seen mics where it has come completely loose and fallen off -- and was then replaced backwards which caused no end of confusion! ;)

I'd find a decent mic repairer and have them properly seen to, partly because if you have it done right you'll maintain the value of the mics (which is not trivial), and partly because I strongly suspect the RF screening provided by the grille will be diminished if the earthing around the base has been affected by it being loose and rattling!

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