No limit?
Hmm... ok.
I haven't followed the trend, but I'd love an amp with a wireless send to the speakers. I'm fed up dealing with "spaghetti" behind my amp. All those wires add up quickly, and it becomes a real mess fast. Is there a system that has hifi wireless send for amps?
Also, if it's a 2-channel amp, 2 pairs of outputs, each with selectable high and low pass. It would make it a breeze to merge low end woofers (or subs) and a fullrange, or any 2-way combination.