AmpsS.M.S.L SH-9 Headphone Amplifier Review by Stuart Charles Black March 19, 2022 by Stuart Charles Black March 19, 2022 Originally published 3/13/21. Updates: 3/19/21. Article revisit. Before we get started, check out Apos Audio. They are a great up-and-coming distributor with a phenomenal-looking website and excellent customer service. They… 0 FacebookTwitterPinterestEmail