What's wrong with you MIT speaker cables? I used the same cables you have with a ProAc/ARC combo and had no issues.
10 responses Add your response
In the 90's when I was using a full Goldmund system with Proac Response 5, the best speaker cable hands down, way above MIT, Transparent, Nordost, Siltech, Tara Labs, was the Cardas Hexlink Golden 5C. The difference was huge! Later versions like Golden Cross, SE9, Golden REF, were not to my liking. I can't comment any further as I don't know about ARC amps, but I can tell you that Response 5 has Belden inside. Till today the most capable speaker cable known to me, is the "Physic Harmonic ECO" handmade by Andreas Pollakis (Facebook).
The price is low but the outcome is so great, you must witness by yourself. He gives 30 days money back guarantee so, you don't have much to loose. (To test it is to keep it. Always!)