We began with the historic Model 9.  We improved that distinctive voice with the MA-9S1.  And 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 coating isolated delicate internal circuitry from extraneous interference.

Power output is the same (300 watts into 8 ohms, 600 watts into 4) as that of the MA-9S1.  This “double down” capability speaks directly to the MA-9S2’s current delivery prowess and, consequently, its ability to absolutely control any loudspeaker.  Although this “brute force” approach might be adequate for some, the S2 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.  This greatly reduces internal vibration and sets the stage for finer resolution of sonic nuances.   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 that used in the S1 for even more prodigious yet superbly controlled bass response.

In addition to fully balanced differential topology, the S2 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, the S2 is a textbook example of meticulous engineering.  As did the original, this contemporary masterpiece redefines the art of audio amplification.

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For operational and technical assistance 24/7, use our self help Online Support Center, where answers to many common questions can be found.

View Warranty information.

IN/OUTPUTS   AUDIO   Main Channel Amp In Balanced: 1, Unbalanced: 2 Bridge Mono Mode - Headphone Out 0 Analog L&R In 0 Analog L&R Out 0 OTHER   External control (RS232C) - D-Bus Remote (RC-5) In/Out 0/0 SPECIFICATIONS   Number of Channels 1 Output Power/Channel (20Hz - 20kHz) 300W (8 ohms), 600W (4 ohms) HDAM HDAM-SA Power Transformer Very Large Capacity Toroidal w/Shielded Case Discrete Amplifier Stage Individual Level Adjust Attenuator (0/-3/-6/-9/-12/-oo dB) THD (20Hz - 20kHz) 0.01% (20Hz - 20kHz, 8 ohms Load) Input Sensitivity/Impeance Balanced&Unbalanced: 1.7V/20k ohms Frequency Response 3Hz - 120kHz (+0/-3 dB) S/N Ratio Balanced&Unbalanced: 123dB (IHF-A) GENERAL   Color Gold Front Panel 3pces Aluminum Remote Control - Power Requirement AC 120V 60Hz Power Consumption 500W Dimensions W x H x D (Inchs) 18” 1/16" x 7 13/16" x 17 3/4" Weight (lbs) 82.4

	Home Entertainment - the MA-9S2 with SC-7S2/SA-7S1 review To an audiophile's ear, this is heaven. Each musical element was distinct and clearly separated from the others.- Gary Altunian Read Review
	POSITIVE FEEDBACK ONLINE MA-9S2 REVIEW In my experience this is the best amp that I have ever in my system. - Arnis Balgalvis Read Review
	Tone Audio - the MA-9S2 with SA-7S1/SC-7S2 review  Read full Tone Audio No.22 Read Review
	10 Audio - the MA-9S2 Review Read Review
	The Charis Awards - MA-9S2 Read Review
	What's Hi-Fi (UK) - the MA-9S2 Five Star Review Read Review

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Personal Message:
I found this item on the Marantz website and thought you might find it of interest. Far more than massive current capability elegantly housed in brushed aluminum, the MA-9S2 thoroughly updates the performance of our original Model 9.  It’s the culmination of more than a half-century’s effort in reproducing audio in the home.  Of course, this must be a Marantz. A major untertaking, the engineers at Marantz tore apart the MA-9S1 and redesigned it from the ground up to be even faster, with less noise, and more authority. The MA-9S2 represents over 50 years of expertise in amplifier circuitry, and sincere love of music.  <UL> <LI>300 Watts into 8 Ohms, 600 Watts into 4 Ohms </LI> <LI>>150 Amps Peak Current Supply </LI> <LI>Custom HDAM® SA Modules </LI> <LI>Full Current Feedback Amplifier Stage </LI> <LI>Double Shielded Low noise Toroidal Transformer </LI> <LI>Fully Balanced Amplifier Design </LI> <LI>Choke Input System Power Supply </LI> <LI>Custom Extruded Aluminum Heat Sink </LI> <LI>Heavy Gauge Internal Wiring </LI> <LI>All Copper Plated Chassis and Double Layered Bottom Plate </LI> <LI>Dual WBT®  Speaker Outputs </LI></UL> <UL> <P><STRONG><A title="2009 Catalog" href="http://us.marantz.com/Reference_Series_Catalog_2009_Marantz_America_Inc.pdf" America Inc.pdf _blank??>2009 Reference Series New Catalog Click here to Download now!</A></STRONG></P> <P><STRONG><A href="http://us.marantz.com/Marantz_Press_Relase_Carlyle_rel.pdf">Press Release related to MA-9S2 (6/16/2009)</A></STRONG><STRONG></P></UL></STRONG>
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Manuals and Documents:

• New Limited Warranty for Reference Series Models (5/1/2009)
• 2009 Reference Series Catalog (2.6MB) (3/30/2009)
• MA-9S2 Spec Sheet (4/17/2007)
• MA-9S2 User Manual - English (10/18/2006)