I have 2 pair of Kg4's front and back, along with a MB quart CTR center and a Boston acoustic VR2000 12" sub. I'm driving them with my 1982 Sansui 9900z reciever. let me tell you they rock. You would not believe how good my Lp's sound. I think the addition of the sub takes them to a whole different level. They have a really solid bass by themselves but the sub takes them over the top. I will never part with them, I may go with the Khorns one day, but I will always have this setup someplace in the house!