Keystone Sub Using 18, 15, & 12 Inch Speakers

[monomer]

Still need to model up some templates, but one thing at a time.

I think I'll also model the barn doors up, as 3db is certainly worth the extra sheet of ply.

 

[Ishom]

It seems like several people used NU or NX amps for powering Keystones. I'm building a rig thus going through several options. Has anyone powered a pair of Keystones with a single NX4-6000?

 

[weltersys]

Ishom,

The NX4-6000 is an updated version of the NU4-6000.
I have powered a pair of Keystones with a single NU4-6000, channel pairs bridged mono to each 4 ohm sub.

That said, with a three way system, normally I used one channel pair of the NU4-6000 bridged into the sub, and the other two channels for mid/high, the two amplifiers on either side of the stage to reduce cable length.
If one amplifier failed, the system could still be run mono, with one sub per channel, ~3dB less power than in bridged mono mode.

Art