Line6 G50 Wireless requires 300mV minimum, T-Rex Chamaleon provides 300mV maximum at each output.
Is it too in the limit of powering?, Has someone tried with good results? :scratchch
Have you already bought the G50? Otherwise, you might want to look into this, I'm quite happy with mine. I think the power drain is 200 mA, I run mine off a Palmer PSU with 250 mA output ports.