Hello Dermio, I had a situation somewhat like yours before I upgraded my speakers and speaker wire. I used to own a relatively low cost pair of JBL LC-310 (3 way with 10" woofer) driven by a KRELL KSA 250. Being on a budget, I double Bi-wired the speakers with 8 gauge multi-strand copper on the woofer and 14 gauge silver-plated/Teflon wire on the Mid/Tweeter. The sound was unbelievable considering the cost. Since I have upgrade to Martin Logan & Kimber I still have the 10 foot lengths of the 8 gauge available. Please Email if interested.