These are very good speakers. I remember using Peavey's since the 70's and they should great. The jbl horns will blow before the Peaveys. Remarkable speaker.
I'd rather have a 12 and some subs. I don't need them to make bass. I heard a really loud rock show on a pair of 300 watt JBL Eon 15 (active) and the electric guitar and vocal was deafening, but the bass guitar was showing the limits and causing distortion. To be honest the total sound level was overkill (for a concert in a recording studio rehearsal room), so perhaps the bass guitar may have worked on a quieter mix. It was one of those teenage metal bands from the school I went to that loved to rock out LOUD. That room has the potential to sound good as there isn't a huge amount of echo. I liked the sound of an RCF rig with 18" subwoofers in there. Would have been some right meaty bass and drums if we'd had it for that concert. RCF do some good bass bins. My Bill Fitzmaurice tops don't even try to be good at bass, but sending it to a subwoofer or two is miles better IMO. It would have been better with some subwoofers. The thing I find about 15 is the upper mid needs to be too strong on axis to make it sound good off axis, or else you need either a big horn for mid-high and a low crossed compression driver, or a separate midrange driver (which I think sounds better). A 15 with an 8 (or horn loaded 6) and a 1" compression driver is quite a nice sounding box. A 15 does do bass better but not as good as a subwoofer.
I used a 15 at an outdoor wedding for 200 people and the clarity was great even when slightly redlined. As long as you don't go over the recommended wattage, you should be fine.
I use the Behringer europowerpmp200d. It can't be said that a particular mixer works with those speakers. they should all work with them. If their clipping, it may be a number of issues, maybe the speakers or maybe the mixer
