When did the BBs start wearing in-ear monitors onstage?

[CenturyDeprived]

In browsing through the photo threads, you see lots of latter-day pics of Mike wearing in-ear monitors onstage; when did this start for him, as well as the other band members?

I can only imagine how subpar the sound mix must have been like in the early days, with primitive sound systems and such, so I'm sure monitors have helped a lot.

[southbay]

My recollection is that the group started wearing them sometime in the mid-90's.  I remember being at a show in the 94-95 time frame (I think) when Mike mentioned they were just breaking in the new in-ear system

[Lonely Summer]

I thought they were hearing aids when I first started noticing them.