Looking through the topic lists I don't see anything recent on wireless mic systems for system tuning.
I am looking for a system that has good response below 20hz. I have found that my current Lectrosonics TM400a rolls off heavy before 50hz which makes crossover decisions in this area difficult.
Is there anything out there with verified response a little lower?
My MacGyver rig using Line6 beltpacks is flat to at least 20, maybe down to 16 Hz IIRC.
Line6 beltpack / receiver / Shure cable / Countryman phantom power box. It's around $600 per channel.
The caveat is your microphone has to be happy with 18v.
Is your microphone solid below 20 Hz?