best sound at shows..many shows is hard to achieve with a crappy design......
i have removed the amps from my 5a as you need to accomplish this task to replace the DBS battery in the main crossover. They are purpose built by Vandersteen and seal very very well in an isolated box within a box. There are something like 16 layers of mdf in a 5a head, short of a model 7 cabinet vibration and effect on drivers, crossovers and amp are well understood by the designer.
on to power chords..er cords for the sub amp....my recollection is RV has tried them and will admit with some cords a micro level of improvement but with many potential pitfalls. a high pressure moldedd plug will outperform over time all but the highest torque mechanical plugs. So far with my model 7 I have stuck with the factory cords...