I use an SM58 myself, a tough, road ready mic.
I’ve used an old wireless before, much like the Nady you describe. As you said, new batteries before every practice! And, while good for guitar, it lacked the very bottom registers needed for bass.
But these X-Vive units are digital, operate at 2.4GHz, and claim flat from 20 to 20KHz. And deliver as far as I can tell! Punchy bass. But one of best things is these tiny wireless units have a built in lithium ion battery, and they come with a wire that charges from any USB power source, both at once! With a 6 hour battery life, batteries are something I do not worry about. The two guitar players in my band are way jealous.
Russell

