Hm.. I thought I used identical wires like I did on my last sub (4mm²) - but it seems that my new sub is wired with only 2.5mm².. Is that too small for a brute like the Rlp18" ? Sub is pretty much complete - so im just wondering if there is any point in changing wires.
Edit: Sub works 100%!
Still some work remains

And I won't be able to get a Behringer DCX2496 before mid-april
