Home brew 4 box Bi-amp speakers using Sea's,and Swan driver's. Theta and Cal Audio transports,Audio Research LS7 Preamp,Audio Research EC22 Crossover for Bi-amping,Audio Research D150.2 for top end. Hafler 9505 for the bottom end.
Goertz,ect. Home brew interconnects,speaker cables,and power cords. Next thing to upgrade,is to build two 6-10 cubic foot cabinets for the bottom end. Current bass cabinet's are from previous system but match well with the top end.