In 1986, AirTight was founded in Japan by Atsushi Miura, establishing itself as a renowned brand consistently crafting highly-regarded amplifiers and audio equipment. It has achieved global acclaim for its innovative tube technology, seamlessly incorporating exceptional digital performance capabilities. Over the past two decades, AirTight has remained dedicated to 300B-based Single-Ended Triode (SET) amplification. After the introduction of the iconic ATM-300 in 1999, the company has launched two additional versions of this design in the last five years. In 2016, they unveiled the ATM-300 Anniversary Edition in celebration of their 30th anniversary, and in 2018, they introduced the ATM-300R, representing the pinnacle of AirTight’s amplifier design.