STEREO CONTROL AMPLIFIER SC-7S1
MONAURAL POWER AMPLIFIER MA-9S1
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SC-7S1
Multi-channel audio has come of age and Super Audio sets the standard. We have
produced the SC-7S1, a new control amplifier inspired by the legendary Model 7,
which long reigned supreme as the ultimate performer in its class. The capabilities
of the SC-7S1 are inherited from one of the original components of audio perfection.
Model 7
Introduced in 1958, this legendary stereo control amplifier was intended to be used by professionals and music
lovers. Our founder, Saul B. Marantz, therefore included frequency equalization for all analog disc formats
available at that time. The philosophy behind the circuitry design and the special attention to even the smallest
(component) details are still, even after more then 45 years, inspiring our engineers.
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MA-9S1
The pure blue indicator is faithful to the tradition of the legendary Marantz brand.
The MA-9S1 is the ultimate monaural power-amplifier for driving even the
most demanding speakers with absolute ease. It represents the perfect balance between
new-age innovation and traditional quality, and verifies that our pioneering ideas of the
celebrated Model 9 live on in the MA-9S1.
Model 9
A legendary monaural power amplifier, introduced in 1961, utilized EL34 tubes in an ultra
linear parallel push-pull design. It delivered an incredibly high output power, which became the reference
benchmark for its time. It was also the first model to carry on its front panel, what has become the
traditional and recognizable Marantz meter.
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Stereo
Control
Amplifier
SC-7S1
The concept: channel separation for
super wide range & dynamic audio
We think it’s of the utmost importance
to extend high frequency response as
well as channel separation so you can
hear the true meaning of “Super Audio.”
This is why we have designed the input
and output circuitry, volume control
section, and power supply circuits
according to this philosophy.
Fully balanced control amp with an
8-gang linear volume control
The SC-7S1 is a full balanced,
two-channel control amp providing
the channel separation you need for
Super Audio. Based on our own high
quality four-gang active volume control
we have developed an even better
eight-gang linear control volume that
reduces gang errors from 0 to 100dB,
0.5dB. By adding an additional
The result: an astonishing channel
separation of over 100dB at 20kHz.
Floating control bus system
HDAM SA* (High Definition
We make it possible to synchronously
drive two or more control amps by
using a floating control bus system
connected to as many as 6 sets of
control amplifiers. We also enable you
to trim levels using the remote control,
making it easy to set up the optimal
sound field on a multi-channel
Amplifier Module), we improved the
Common Mode Reject Ratio (CMRR)
dramatically, attaining an incredible
ultra-wide frequency band of 150kHz
and succeeded in producing the perfect
control amplifier for Super Audio CD.
Choke input system
configuration. The highest achievable
stereo performance can be accomplished
when a system configured with two sets
of SC-7S1 and four sets of MA-9S1 are
connected in a bi-amped mode.
In the power supply section, the choke
input topology was adopted to
drastically reduce rectifier harmonic
noise. This system is especially suitable
for a control amplifier in which very
small signal amplification occurs.
You will experience superb sound with
unbelievable channel separation.
*HDAM SA
The feedback impedance of the Current
Feedback circuit was reduced to its minimum
to make it faster. We developed a new High
Definition Amplifier Modules (HDAM), a
separated module operating as a buffer for the
amplifier. The SC-7S1 has four HDAMs on
each input-output buffer and another four
units on the V/I converter.
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Monaural
Power
Amplifier
MA-9S1
Instantaneous current
delivery capability
Even if amplifiers have the same
Fully balanced monaural power amp
power specifications, their performance
may not be the same due to a
To minimize the influence of strong
“return current” occurring from the
difference in current delivery capability.
The delivery capability of a power
amplifier depends on how instantaneous
the current supply is. That’s why
the power supply for the MA-9S1 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.
loudspeaker system, the circuit for the
power amp consists of two amplifiers
giving a voltage gain amp of 23dB,
in a 3 paralleled push-pull balanced
construction, for the final buffer amp
of 6dB.
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.
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 Super Ring power
transformer, the low impedance
electrolytic capacitors, the very large
gauge internal wiring, and the thick
pattern PCB all contribute in supplying
the required power.
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SC-7S1 Stereo Control Amplifier
Volume control
Channel level trim
Attenuation
-∞, -100~0dB
6dB
(0.5dB steps)
(0.5dB steps)
Rated output (20Hz - 20kHz)
1.7V
1.7V
(Balanced)
(Unbalanced)
(Balanced)
-20, -40, -60, -∞
Balanced input
Unbalanced inputs
Tape in/out
Maximum output (20Hz - 20kHz) 13.5V
13.5V
Inputs/Outputs
x1
x3
x1
x1
(Unbalanced)
(Balanced)
THD (20Hz - 20kHz)
Frequency Response (+0, -3dB)
Input sensitivity/impedance
Output impedance
0.0015%
0.003%
(Unbalanced)
(Balanced)
Balanced output
3Hz - 150kHz
3Hz - 150kHz
420mV/20kΩ
420mV/20kΩ
220Ω
Unbalanced outputs x2
120V 60Hz
(Unbalanced)
(Balanced)
Power supply
Power consumption 18W
Maximum dimensions Width
Height
(Unbalanced)
(Balanced)
459mm / 18”
136mm / 5 1/8”
441mm / 17 1/8”
220Ω
(Unbalanced)
(Balanced)
Depth
S/N (IHF-A)
103dB
Weight
21 Kg / 46.3 lbs.
AC mains lead, remote cable
105dB
(Unbalanced)
(Balanced)
Accessories
Channel separation
>100dB
Remote controller(RC-7S1SC), AAA battery (x2)
>100dB
(Unbalanced)
MA-9S1 Monaural Power Amplifier
Rated output (20Hz - 20kHz)
300W
600W
0.01%
8Ω
Attenuation
0, -3, -6, -9, -12, -∞
4Ω
Inputs/Outputs
Balanced input
Unbalanced inputs
Speaker output
120V 60Hz
x1
x1
x1
THD (20Hz - 20kHz, 8Ω)
Output range (8Ω, 0.05% THD) 5Hz - 55kHz
Frequency Response (1W, 8Ω) 3Hz - 120kHz (+0, -3dB)
Damping Factor (20Hz - 20kHz, 8Ω)200
Power supply
Power consumption 450W (minimum)
Input sensitivity/impedance
1.7V
(Balanced)
Maximum dimensions Width
459mm / 18”
198mm / 7 5/16”
451mm / 17 5/16”
1.7V
(Unbalanced)
(Balanced)
Height
Depth
S/N (IHF-A)
120dB
120dB
29dB
29dB
(Unbalanced)
(Balanced)
Weight
35.8 Kg / 78.9 lbs.
AC mains lead
Voltage Gain
Accessories
(Unbalanced)
Printed in the United States on recycled paper because trees matter.
*All specifications, dimensions and weights are subject to change without notice. Marantz, Marantz America, Inc. or any of its subsidiaries
will not assume any liability for errors in this full line catalog which may result in consequential errors being made by retail dealers, design-
ers, custom installers, cabinet makers or end users, etc based upon information contained within this document.
The information contained herein is protected by United States and foreign copyright laws. This document is intended for the exclusive use
of authorized Marantz America dealers only. Reproduction in whole or in part of any information contained herein is strictly prohibited.
Violators will be prosecuted to the full extent of the law. Both civil and criminal penalties apply.
Marantz America, Inc. 1100 Maplewood Drive • Itasca, IL 60143
Phone 630-741-0300 • Fax 630-741-0301 • www.marantz.com
09/03
©2003 Marantz America, Inc.
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