So I picked up a pair of older Carvin 1562 towers as backup solutions and decided to give them a field test last night at a gig. Typically I run two PR15's for tops and two Yamaha SW118's for subs. The subs are powered by a GX7 and the tops a GX5. My x-over is a bbe xmax and I use the built in sonic maximizer set for a slight past noon processing. My mixer is a QSC TM16 The Carvins are 2x15 with a horn and are bi-ampable. I used the amps and x-over as I would have with separate tops and subs. The confusion is our FOH has never sounded better! I mean it didn't sound like crap or anything before but last night in a room we play a lot our FOH was outstanding. The bass was punchy and deep and the mids and highs were crystal clear. The overall mix seemed to be much easier to achieve great balance. Wish I had some audio worth proving it but I dont. I'm not a sound engineer so I am going to stay with the Carvins and leave the tops and subs as the backups, but it still leaves me scratching my head as to why it sounds so much better. I was always told by sound engineer friends that separate tops and subs will always sound better than an all in one solution. DOH!