I'm interested in getting Kef Ref 201s and a 202c. They can be tri-amped, which I'd like to do. I know how to bi-amp, but I'm not sure how to tri-amp. To bi-amp I'd do one of the following: 1. Buy a pre/pro with both RCA and balanced preouts and run each set of outs to a different amp. 2. Use metal RCA splitters (essentially a 'Y' cable) to split the RCA signal to two amps. Is the only way to tri-amp a combination of the two? Do XLR cables come in a three way split? Do RCA splitters come three way? Thanks in advance.