I have biwire (4 x 13 AWG) OCC copper speaker cables and a pair of Spendor SP2/3R2 biwirable speakers. I have tried all the possible permutations (except for high quality, pricey jumpers) and my preferred method of connecting the speakers is as follows:
- at the red speaker terminals: tie together two 13 AWG cables and connect them to the midbass terminal, then use a stock gold plated metal jumper plate to connect the midbass and tweeter terminale
- at the black speaker terminals: ditch the stock plate and do a normal biwire (one 13 AWG cable to midbass and one to tweeter
I haven’t tried the above solution but with the colors reversed, maybe biwiring the red terminals instead would have resulted in a somewhat different sound?!