In my experience, short speaker cables (say 4 feet) make a substantial improvement, particularly in an area with high RFI. (I live in New York.) If your interconnects are 2 meters or less, regardless of whether or not they are balanced, shorter speaker cables are the better choice. Over two meters, the IC's should be balanced to make this trade-off effective.
Long IC/Short Speaker or Short IC/ Long Speaker
For monoblocks setup, would it it be better sonically to run long interconnects (from pre-amp to amp) and shorter speaker cables (from amp to speakers) or to run short interconnects and longer speaker cables? Does it make a difference? One thing I must note is that I can only run RCA connection IC. I do understand that the gain is more gain when using XLR IC. Thanks for your help.