I have tried a few different solutions for a power amp for my hx and im finally happy with the cat 200 BUT : The speakers are kind of badly tuned. you need additional eq via the hx and then it sounds great. Or, you can use it standalone (sort of) with that EQ through the fx loop, and the hx just as effects and as a midi controller and it also sounds excellent. I use it normal loop in with the verb on the amp, saving blocks on amps, cabs, and verb or even delays if i use it this way. I havent really decided which i like more, apart from the amps in the hx that the cat doesn't have . there are so many ways to skin a cat these days.