I won't bother with a pic, but I just got my new PLX1804 in after sending off my PLX1602 monitor amp for repairs, and rearranged the amps for a little bit more power.
BUT the big thing was I used the PLX1804's channel one speakon out for both top outputs (U15s) in stereo using 4 wire cable to my I/O panel's seperate monitor speakon outputs. Saved one Speakon plug by doing so. The PLX 1104 & 1804 only have speakon outs but the channel one also has channel two on the speakon +2, -2 terminals.
When I get the 1602 back I'll have a chance to try bi-amping the U15s. Although if we like it, that'll open a new can of worms since I use four wire to feed top & sub to each side bar stack.
Mike McNany