If you don't want to risk the problems that come with most digital amps, you can look into type-H amps. They run much cooler than A/B amps, but usually run more than their A/B counterparts.
Second that. My GX5 is Class-H and runs very cool on the low rail. But once your want to feel the music, it gets hot via the high current rail. As expected, I don't know what any of that means, but I know it works!
From QSC:
The GX5 uses a Class H system, based on key elements of the PLX Series, almost doubling power in the same size and weight. QSC design expertise allows the output devices to shift from low-power to high-power rails in less than a millionth of a second, ensuring that the output power is always right where it needs to be without excess loss - runs cool on background music and TV, cranks till my ears bleed without clipping.
