[moff]

I WAS using a Shure PSM400 system, with the optional 4-channel line mixer\splitter. The original E3 earbuds were only OK at best, so I upgraded Shure SLC5s (dual-driver).

Then the FCC and the CRTC/Industry Canada reserved the "700 MHz" band (698-806 MHz) for emergency use only, making my Shures illegal for use here or in the USA. At that point, I purchased the Sennheiser IEM 300 G3 system, which I love to death - especially with the SLC5 earbuds.

I can't speak about wired in-ear systems...