Here's the deal: I'm currently using 2 QSC RMX 1450's (both in bridged mono / 1400 watts @ 4 ohms) to power:

(2) Carvin LS1503's - 400 program / 800 peak / 8 ohms

(2) Yorkville 18" Subs - 300 watt rating / 8 ohms

I also have a really nice QSC PLX 3102 amp (600 watts into 8 ohms stereo and 3100 watts into 4 ohms bridged mono). Would there be any logic in swapping out the main's RMX 1450 for the PLX 3102 or do I have things pretty well matched? I was toying with the idea of going stereo but I'm not sure if 600 watts / channel will be sufficient.

As always, I appreciate your collective insight!

Riis

700W/box is a bit much for a box rated 400 Program - the rule of thumb says 400W. I'd use the PLX in stereo. It's only a little less power than the bridged RMX, but it will draw less juice from the mains (and it's less weight to haul around).

700W/box is a bit much for a box rated 400 Program - the rule of thumb says 400W. I'd use the PLX in stereo. It's only a little less power than the bridged RMX, but it will draw less juice from the mains (and it's less weight to haul around).

I'll give it a try. I believe the PLX is a more efficient design as well.

Riis

I'd put the PLX powering the 1503's and the RMX's powering the subs. Aside from power you also have to consider sonic quality. I think the PLX trumps the RMX in that arena pretty easily. Could also biamp the 1503's with the PLX on the mid & hi, an RMX on the low, and an RMX on the subs (if your crossover supports 3-way that is)

And unless you're going to use the pan knob on your board, or record off it, just keep it mono.

I'd put the PLX powering the 1503's and the RMX's powering the subs. Aside from power you also have to consider sonic quality. I think the PLX trumps the RMX in that arena pretty easily. Could also biamp the 1503's with the PLX on the mid & hi, an RMX on the low, and an RMX on the subs (if your crossover supports 3-way that is)

And unless you're going to use the pan knob on your board, or record off it, just keep it mono.

Kinda what I was thinking. Now, what should I do with regards to configuration? Should I run both the PLX and RMX in stereo (one side per cab) or go with bridged mono on both? Note: I'm very careful with volumes and the attenuators. Really need to plot things as I'm ready to install a dbx DriveRack.

Riis

I use a similar setup for smaller gigs, two LSx1503's and two LS1801N subs. I run the tops in biamped stereo and the subs in bridged mono.