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“an
amplifier with high power (150 wpc) that can drive any speaker with a
reasonably consistent impedance, and that also has the harmonically luscious
presentation associated with low-powered SETs. It combines that SET rich
and lifelike midrange with superbly articulated deep bass and an open
and airy treble. Its transient response is the finest I have heard at
any price.” Paul Bolin, Golden Ear Award 2000 – the Absolute Sound [click here for full article] |
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The MA-1 employs more of what audiophiles have craved
in amplifiers since the beginning of HiFi. The list of features outlines
an all-encompassing, musical design that has yet to be equalled by any
amplifier except Atma-sphere’s own MA-2 Mk. II.3.
The best way to describe the design is much like a pair of single-ended triode amplifiers wired together differentially. It is the world's first Class-A, all triode, fully-differential, zero feedback, output-transformerless amplifier (the original MA-1 was introduced in 1987). Thus it can reproduce greater depth, the lowest, most precise powerful bass, with sumptuous, revealing midrange and highs whilst remaining tonally neutral. The MA-1 Mk. II enjoyed an enviable reputation. Now it has been replaced by an upgraded version, MA-1 mkII.3, built on the same circuit concepts, featuring an enhanced driver circuit for lower distortion and wider bandwidth, driver supply regulation, again for lower distortion and enhanced AC power immunity, and a new chassis that features welded and polished corners for a seamless look. (AKA the Silver Edition in celebration of the completion of over 25 years of Atma-Sphere operations - after July of 2004 it will be called the MA-1 MkII.3). The MA-1 has proven itself to be an extremely reliable amplifier as well as inherently musical. The output tubes are reliable and inexpensive. The MA-1 is the correct balance between music and electronics. Designed for music, not sine waves, the MA-1 tracks dynamic waveforms faster than any other amplifier in the world. It extracts more detail than ordinary designs, thus presenting your music intact. Further reading... |
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