Air Tight ATM-300R Stereo Power Amplifier

• Abolishing Vanity and Extracting Musicality

• Even now many audiophiles are still longing for 300B direct-heated triode valve. We too, were captivated by the charm of this valve. Our approach is to pull out the full potential of 300B valve’s musical soundstage without any additive coloration. As a result, we could achieve a goal of timbral purity and tonal realism by means of 300B’s idiosyncrasy.

• Detail Researched Design without Compromise
  In all of circuit design, manufacturing and choices of components, researches are done to details to realize the vivid music reproduction without tonal coloration. At the same time, the stability in the long term is also considered. Best obtainable electrolytic capacitors, coupling film capacitors and winding resistors were chosen. Traditional hand-winded

  plastic bobbin-less interlaminar transformers were employed for the power transformer and choke coil. They are made by an orthodox lacquer vacuum impregnation method to minimize the vibration and beats so that the musical signal modulation is prevented. Resistors and capacitors are installed on the pure copper sub-chassis board.

  Wiring and soldering are hand made by skilled workers. All for the peerless and sublime sonic quality. We chose rectifying tube 5U4GB to protect 300B for the purpose to prevent rectifying noise. Also slow starter circuit is for the protection of 300B. Monocoque main chassis made of folded and welded steel plate is for timbral purity. Electric welded stud bolt rewards firm electric conduction and fresh sound as well as clean appearance as none of the screw heads are visible at a glance on the surface.

No 300B tube provided with amplifier.