Marantz MA-9S2 Catalog page 4

The MA-9S2
We began with the legendary Model 9. We improved that distinctive voice with the MA-9S1. Now we present the MA-9S2 as the latest step in
our relentless pursuit of sonic accuracy. It defines new horizons in both musical performance and contemporary elegance. When you first see
the MA-9S2, you'll be impressed with its clean yet purposeful look. The 35mm-thick aluminum chassis and double-layer bottom plate forms an
extraordinary rigid structure. Copper plating isolates delicate internal circuitry from extraneous interference. Power output is 300 watts into 8
ohms, 600 watts into 4. The MA-9S2's current delivery prowess give it it's ability to absolutely control any loudspeaker. Although this "brute
force" approach might be adequate for some, the MA-9 incorporates several advances designed to further improve sound quality. First,
consider the power supply. The toroid power transformer benefits from a newly-developed "dual hemisphere" design with acoustical isolation
augmented by silicon steel and a damped aluminum case. Shottky barrier diodes provide rectification for the voltage amplification stage to
eliminate subtle ripples that can negatively impact overall clarity. Finally, the storage capacitor bank so important for the current amplification
stage is 50% larger than before for even more superbly controlled bass response.
In addition to fully balanced differential topology, the MA-9 uses current feedback implemented with six HDAM-SA modules for faster
response and lower noise. Flexibility is a key element in the MA-9S2's appeal, too. Three switchable inputs (two single ended, one balanced)
complement the biwire-capable WBT speaker outputs. The high-precision power meter lets you keep tabs on the amplifier or you can switch it
off completely for concentrated listening. All in all, this MA-9S2 is a textbook example of meticulous engineering. As did the original, this
contemporary masterpiece redefines the art of audio amplification.