I have to maintain equipment for 1- 5 pc gigs. I found it beneficial to assemble power cords and shielded speaker cables in split loom together. Made up 2 each in 7, 14, 20' lengths for stereo use. Colored tape at end to identify lengths quickly. An ice to 3 prong power adapter allows combining lengths for long runs though rarely needed. Run them back to mixer and nearby power strip (in rack). Similar assembly from keyboard to mixer - stereo cable, power, Mic cable in split loom. Another from keyboard to volume,sustain pedals. Neat and fast. Takes initial time and work but you get it back quickly, and no individual wire mess all over. Cables fit in one bag.