Marantz MA-9S2 - Manual (Page 7)

ENGLISH
3
MAIN FEATURE OF PRODUCT
7
The concept : Instantaneous
current delivery capability
Even if amplifier have the same power specifications, their
performance may not be the same due to a difference in current
delivery capability.
The delivery capability of power amplifier depends on how
instantaneous the current supply is.
That’s why the power supply for the MA-9S2 was completely
revamped to give it a truly instantaneous current supply
capability that has been increased three times as much
compared to any Marantz product designed before.
7
Fully balanced monaural power
amp
To minimize the influence of strong “kick back current” occurring
from the loudspeaker system, the circuit for the power amp
consists of two amplifiers giving a voltage gain amp of 23dB,
in a push-pull balanced construction, for the final buffer amp
of 6dB.
7
HDAM SA
The feedback impedance of the Current Feedback circuit was
reduced to its minimum to make it faster.
We developed a new Hyper Dynamic Amplifier Modules
(HDAM), a separated module operating as a buffer for the
amplifier.
7
Choke input system
The power supply of the voltage gain amplifier’s adopted choke
input system has few ripples and is durable with load changes.
This can prevent noise from the amplifier as well as reduce
noise from the primary winding, resulting in a clean power
supply.
7
Ultra low impedance amplifier
The buffer amplifier’s power supply block, which supports the
high current delivery capability, uses a capacitance input
system to realize very low impedance.
The new developed toroidal power transformer, the low
impedance electrolytic capacitors, the very large gauge internal
wiring, and the thick pattern PWB all contribute in supplying
the required power.
06.8.9, 1:34 PM Page 3