Where are the plate amps going to be located? I guess the shortest wiring would be with each amp at the back of the middle box of the three woofers that amp powers. You could mount each amp on strips of MDP running across the back of that middle box. By the way, are you getting the XLR2 version of the A370 amp? If so, you can slave the second amp off the first on each side (left channel and right), making adjustments easier.