I use the sx 500 + for 2 years.
what I like about these speakers, it sounds now.
I look quite a speaker before making this choice, and to my taste the best sounding electro. at the correct price is ca saw the versatility of the material, I groups into sounds (electronic drum ... etc) never any problem going nickel.pour large benefits is better to add a sub, benefits for small and medium (marriage concert) we can dispense with sub.
if I had to redo this choice I will not hesitate!