I have used for at least 3 years

Yes (lucas. .. Many amplified speakers)

The least: power limited but the 500 is no match for a pair of amplified.

Very handy, versatile, quality price is well placed but it's some time since I have not tried or experienced real copies.
At the time of my purchase one but Yamaha did not offer a real equivalence.

But Yamaha is Yamaha with its legendary value for money ...