[This article](http://www.lectrosonics.com/US/Press-Releases/ac-dc-rocks-on-with-lectrosonics.html) talks about the wireless system by Lectrosonics that Malcolm Young used during AC/DC's Black Ice Tour. It says, "The new Lectrosonics system used by Malcolm Young includes two R400A Digital Hybrid Wireless™ diversity receivers, eight LMa Digital Hybrid UHF beltpack transmitters, and several MI39A guitar cables with right angle plugs."more
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