Introduced in 1990, the MA-2 was the largest production triode amplifier and the largest production OTL in the world for nearly 12 years. In that time it set the bar for quality that has yet to be surpassed; it is one of the finest amplifiers made anywhere in the world regardless of price. Not only is it one of the most powerful production Output Transformerless amps available, it is also the most reliable. Audio purists have craved the design features of this amplifier since the beginning of Hi-Fi; only Atma-Sphere has succesfully put them all in the same place at the same time.
Now the Mk. 3.3 boasts an improved gain stage with even wider bandwidth and greater transparency than ever before. We have added switchable feedback and automatic tube biasing to round out the package. Yet it remains smooth, detailed, and tuneful with a speed that belies such a large tube amplifier. Unlike many other amplifiers, it will stand up to constant playback without any noticeable artifact. And the improvements the MA-2 offers will be obvious on any system within seconds of powering it up; it sounds that good.
220 watts per channel into a 4, 8, or 16 Ω load before clipping
Selectable up to 600 Ω
2.8 V sensitivity
RCA and XLR true balanced input
( per channel ) 20 x 6AS7G output tube
6 x 6SN7 driver tube
2Hz-150KHz within 1/2 dB
80 Amps/channel
( per channel ) 1200 Joules in output section, 100 Joules in Driver supply
( per chassis ) 28" deep x 17" wide x 10" tall ( 71 x 43 x 25 cm )
( per chassis, without tubes ) 103 lbs ( 46.7 kg )
by Atma Sphere
Introduced in 1990, the MA-2 was the largest production triode amplifier and the largest production OTL in the world for nearly 12 years. In that time it set the bar for quality that has yet to be surpassed; it is one of the finest amplifiers made anywhere in the world regardless of price. Not only is it one of the most powerful production Output Transformerless amps available, it is also the most reliable. Audio purists have craved the design features of this amplifier since the beginning of Hi-Fi; only Atma-Sphere has succesfully put them all in the same place at the same time.
Now the Mk. 3.3 boasts an improved gain stage with even wider bandwidth and greater transparency than ever before. We have added switchable feedback and automatic tube biasing to round out the package. Yet it remains smooth, detailed, and tuneful with a speed that belies such a large tube amplifier. Unlike many other amplifiers, it will stand up to constant playback without any noticeable artifact. And the improvements the MA-2 offers will be obvious on any system within seconds of powering it up; it sounds that good.
220 watts per channel into a 4, 8, or 16 Ω load before clipping
Selectable up to 600 Ω
2.8 V sensitivity
RCA and XLR true balanced input
( per channel ) 20 x 6AS7G output tube
6 x 6SN7 driver tube
2Hz-150KHz within 1/2 dB
80 Amps/channel
( per channel ) 1200 Joules in output section, 100 Joules in Driver supply
( per chassis ) 28" deep x 17" wide x 10" tall ( 71 x 43 x 25 cm )
( per chassis, without tubes ) 103 lbs ( 46.7 kg )
