Hi Bill,...

The HK Audio Nano 600's are a totally different animal in a
GOOD Way! ...both systems are super proficient on stage.
The Yamaha DXR/EV ZXa1 Sub combo now gone can really kick butt at the expense of a heavier bigger system. What I do like about the using Two Nano 600's is that I now have so much more flexibility in so many ways with the onboard MIXER in Mono using a single system & Stereo or both systems in tandem which sounds amazing. But my back thanx me every gig because transporting these systems with satellites attached is a breeze using the add-on accessory package. The Sub compared to the Nano 300 is night and day because it's a wooden cabinet design and the power is amazing to cover any venue I perform at. The new speakon speaker cable hookups also make it so easy to setup. The new Satelite Multicell distribution transformer design inside works like a line array fanning the sound out up, down & out with great coverage. I'm happy with this purchase.

http://hkaudio.us/products.php?id=414