I use this product for years, front or back (rather returns, in fact), inside or outside on the live music "alive" (not DJing, what).

I like this system quite striking sound pressure level. The PS15 is in my view an excellent selection of back when we know that zicos will need large levels on stage. Crane, for small plans, coupled with subs, it does not hurt.
Its level, well ... even be aware to avoid feedback, and this little color in the upper midrange that so few people appreciate.
In terms of reliability, ca does, of course with the processor adapted.

A product road, efficient, lightweight to implement.