AIR TIGHT (A&M, Ltd.) is a Japanese boutique manufacturer founded in 1986 in Osaka by Luxman veterans Atsushi Miura and Masami Ishiguro. Renowned for artisanal, PCB-free point-to-point construction and rigorously selected parts, the brand prioritizes timeless musicality over mere specifications. From the seminal ATM-1 to the reference 300B and 211 amplifiers, each component is hand-built in small numbers to evoke the depth and presence of live performance. President Atsushi Miura—an inductee of The Absolute Sound’s High-End Audio Hall of Fame—continues to guide AIR TIGHT’s pursuit of heirloom-grade hi-fi.