This - and I don't miss the silly coloured plastic wrap and shields connected to nothing. Worth checking those distribution blocks for odd resistors and other bits of crap you're better off without, too. If found, I'm sure you know where the bin is.
While you're at it, why not dispense with the ridiculous dedicated consumer unit rewire job and plug the kit into the standard house wiring it was designed to work with - if you have to get an electrician in the do the work just bite the bullet and pay up. It will be a small price to pay to join the ranks of the sensible folk who enjoy music...
Under no circumstances buy kit if a manufacturer or dealer suggests that after spending six figures you need to rewire your house to make it work well. The overwhelming majority of homes have a very good electricity supply.