Thank you, I'll give it a try maybe... As I said I'm scared about 2.4Ghz but adding 5.8 could solve the problem. The GLXD16+ has small bodypack and stomp receiver, that is a plus. I was asking about walls just to make a comparison with the Boss WL-20, that suffers a lot from the presence of obstacles (at least in my case). I was blaming the frequency range but maybe I should blame BossThe new one- the GLX16+ uses both bands. I have the older one (GLX16- no "+") - think it's just 2.4 GHz.
I've never had an issue with it, but I only use it at gigs, where walls aren't generally an issue. Can't say I've really pushed the range. Haven't really wandered more than ~50 feet. But again, it's been rock solid.