Good morning, Quadrophonic community! I am new to your community (and ANY online community if I not mistaken) so please bear with me. As a Longtime music enthusiast but only just recently into Quad and 5.1 surround sound, most of my life has been spent with 2 channel audiophile systems (Linn, Nakamichi, Bryston, B&W, OPPO) so although I have a deep and breadth in this field, my personal experience in Quad and surround sound has mostly been limited to my reading habits (Absolute Sound, Stereophile, etc.) and a family friend that was an original first adopter of Quad in the early 70's (Russ was a navigator for Pan Am and flew on a 747 between LAX and Hong Kong and later West Berlin and was able to purchase and bring back stereo equipment seemingly by the plane load!). As a very young buy in 1973, this exposure helped galvanize my love and interest in all thing's audiophile. I recently jumped into the surround world after upgrading my system to include an OPPO 205 Ultra 4K, Arcam A/V processor, B&W subwoofer's, in-ceiling B&W's and a B&W center channel to go with my existing B&W 806's. look forward to reading your thoughts, praises and critiques especially since there have been recent quad offerings (Quadio) and 5.1 surround sound (High Fidelity Pure Audio & 2L). Thanks again for admitting me into your group. Happy listening!