Martin Logan Ethos x 4 (R, L, RS, LS); Martin Logan Stage X (C); Velodyne DD18+ (Sub); Krell Foundation 4K Processor; Parasound Halo A21 and A51; Oppo 103D; Kimber KCAG interconnects; Kimber Monocle XL speaker cable. All five speakers crossed with sub at 80hz.