I bought a pair of Castle Haworths some years back from an excellent local supplier now retired and have just had to move them for the first time to redecorate. Each has 1 red and 1black imput/ socket and the cable has 1 red and 1 black plug/ end. One speaker had red in red and black in black but the other had red in black and black in red. I assume the colours should match but does it make a difference? They have always sounded pretty good but it was/ is my first decent(ish) system