Yep, that is one of the downsides to these amplifiers: They are back breakers! And I occasionally show my active loudspeakers at audio events, so that entails lugging around the amplifier along with the loudspeakers. Now worse yet, when I complete the 4-way, it'll be two heavy amps.

I also have the Outlaw 990, but I only use it for digital source selection, keeping the signal in the digital domain into a miniDSP 4x10HD, which then performs the D/A conversion for my amps. Volume control is through the miniDSP. The sound is absolutely stunning, and I really don't anticipate much improvement with a 4-way, but who knows?. I would like to test the effects of using dipole behavior for controlled loudspeaker directivity.