I am currently bi-amping Vandersteen 3A Signatures with Mark Levinson 331 amplifiers and Yamamura 6000 speaker cables. Originally, I had been bi-wiring with two pairs of Kimber KC8 cables. The sound quality was improved, greater resolution, better base, etc. However, I am not sure thet the improvement was worth the expense of buying another amplifier and additional Y-interconnects and speaker cables (about $5K). If you really like the Vandersteens, the may want to do this, but I now feel that it may have been more cost effective to just buy different speakers. In your case, I believe that the Vandersteen manual says that you should use identical amplifiers because matching gain is difficult.
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