Currently running 4 way. 4 double 18's for subs, 2 double 15's for lows, 4 -10" x 1" mid highs. Ashley Protea Processor, Midas Pro1 console, 2 Lab Gruppen FP 3400 on subs,1 QSC PLX3402 on lows, 1 QSC PLX 3002 on mids and 1 Lab Gruppen FP 2400 on highs. I am still using an analog snake. Last year, I upgraded the sub amps from PLX3402 to the Lab Gruppen FP3400. It made a nice difference in the subs.Not only louder,but warmer. So my thoughts for upgrades would be 2 Lab Gruppen FP 6400 or Midas stage box and digital snake. They would both be in the same price range. Any thoughts on which direction to go that would make the most difference?