I have used Sennheiser 855s for years. Love it. May try a 900 series because mine are getting pretty old.
I have Shure SM58, a couple of Behringers (they are pretty good!), a couple of EVs, an AKG D5, Samson Q7, CAD condenser, a beautiful WHITE Peavey, and four or five more.
I keep several Samson R11 mics for use as guest mics. They are like 3 for $50, but sound very good. They have a LOT of proximity effect, so need to roll of bass.
I have a Astatic CMD condenser that sounds fabulous, but the output is too hot for the PA3X. Can't get the signal low enough without using an external device to attenuate it.
BTW, if anyone is interested in OWNING one or more of these, they can be yours for half whatever they sell for on line!
DonM
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DonM