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Anthem's MRX A/V Receivers are about maximizing audio performance that previously has been unobtainable at their respective price points. New features, capabilities and robust integration position Anthem MRX Series as the ultimate power center of premium 

Anthem® MRX Series 11 Channels A/V Receiver

Anthem's MRX A/V Receivers are about maximizing audio performance that previously has been unobtainable at their respective price points. Building on the feature set of our previous models, we've added the newest version of ARC Genesis, a redesigned and more accurate calibration microphone, Anthem's Web User Interface, integrated streaming support, object-oriented audio codecs with support for up to 15.2 channels and the clean power delivery Anthem is known for with up to 140 watts per channel.

The MRX 540, 740 and 1140 are a great way to bring premium audio to any home theater or media room. Seamlessly integrate your smart TV or projector with 7 dedicated 8K HDMI inputs that support 8K/60Hz or 4K/120Hz pass-through and 3 dedicated outputs with eARC. With MRX, you can enjoy 8K quality video from all of your 8K source devices in amazing clarity.

New features, capabilities and robust integration position Anthem MRX Series as the ultimate power center of premium home theater and audio.

15.2 Pre-Amplifier / 11 Amplifier Channel A/V receiver with Dolby Atmos, DTS:X and IMAX Enhanced. 140-watts per channel continuous power into 8 ohms. Includes ARC (Anthem Room Correction). HDMI 2.1, HDCP 2.3 supporting 8K/60Hz or 4K/120Hz

At Anthem, our goal is to shape how you interact with your technology, so we went the extra mile to ensure no detail is overlooked while providing the utmost flexibility when it comes to device setup. Using a phone, tablet or laptop, owners can easily access any function or setting and make changes on the fly. Power the primary or secondary zone on and off, adjust volume, change audio modes, tweak channel trims and more, for a perfect surround sound experience. You're in control, and it's never been easier.

Advanced 8K HDMI Platform with e-ARC Support

Feel the power of every frame with the MRX Series and its advanced 8K HDMI 2.1 Platform with HDCP 2.3. Showcasing 7 dedicated 8K inputs which support 8K/60Hz or 4K/120Hz pass-through and 3 dedicated outputs with Enhanced Audio Return Channel, you can enjoy 8K quality video from all of your 8K source devices in amazing clarity. Also featuring the latest HDMI technology and specification, the MRX 540, 740 and 1140 allow you to take your home entertainment to the next level with HDR10+, Dynamic HDR10+, ALLM and VRR support. The possibilities are limitless; unlock the true potential of your media with the industry’s most flexible and feature-rich HDMI platform.

Experience Gaming Like Never Before on an MRX

It’s never been a more exciting time to be a gamer. With the latest consoles offering up to 4K/120Hz graphics, realistic HDR and Dolby Vision dynamic range, and immersive Dolby Atmos sound, you have to make sure your Home Theater gear won’t hold you back. Enter the MRX Series, our most feature-rich AV receivers to date!

The built in high performance amplifier modules can be configured in many ways to suit the specific speaker configuration. Unused amplifier channels can be re-assigned to Bi-Amplify demanding front speakers, power surrounds, presence speakers, or a second zone (Available on MRX 1140 and MRX 740).

Configure amplifier channels for your system's needs, then fully optimize the presentation with ARC Genesis.

Our latest Anthem MRX series features external control and IP control capabilities for easy customization and compatibility with third-party integration solutions. It offers IP control capability for major third-party control devices including:

At Anthem, we have one simple goal – to design, engineer and manufacture audio/video products that deliver premium performance and convenience at a reasonable price. We do this by spending thousands of hours selecting and testing components, carefully designing our own circuit topologies, and backing them with robust power supplies that ensure maximum long-term quality and reliability. We achieve this with our team at the Paradigm/Anthem Research Center and their decades of combined experience.

Gain unprecedented command over your network-enabled Anthem A/V Receiver, Processor or Pre-amplifier.

The Anthem Remote App uses a Wifi connection to simplify the configuration of supported Anthem devices. App-based controls include volume level, muting, input selection, power, listening modes, bass, treble, level trims, menu navigation, and Anthem Room Correction (ARC) control.

Instant Rebate through Aug 17

Instant Rebate through Jan 5

Anthem's MRX A/V Receivers are about maximizing audio performance that previously has been unobtainable at their respective price points. New features, capabilities and robust integration position Anthem MRX Series as the ultimate power center of premium home theater and audio.

Anthem® MRX Series 5 Channels A/V Receiver

7.2 Pre-Amplifier / 5 Amplifier Channel A/V receiver with Dolby Atmos, DTS:X and IMAX Enhanced. 100-watts per channel continuous power into 8 ohms. Includes ARC (Anthem Room Correction). HDMI 2.1, HDCP 2.3 supporting 8K/60Hz or 4K/120Hz

The AVM 70 a great way to bring premium audio to any home theater or media room. Seamlessly integrate your smart TV or projector with 7 dedicated 8K HDMI inputs that support 8K/60Hz or 4K/120Hz pass-through and 3 dedicated outputs with eARC. With AVM, you

Anthem® AVM Series 15.2 Channels A/V Processor

Since the AVM 50 and Statement D2 A/V Processors, music lovers and home theater enthusiasts have coveted Anthem’s premium surround separates. Featuring industry-leading room correction, expert management of the latest audio formats and robust integration; Anthem is the ultimate nerve center of any premium home theater or media room.

With the latest version of ARC Genesis Room Correction, a redesigned and more accurate calibration microphone, Anthem Web User Interface, an all-new electronics platform and a new modernized design; the new AVM A/V Processors bring all of today’s technologies into a single component.

Object-oriented audio codecs have been updated with support for up to 15.2 channels; as well as built-in streaming support for Apple AirPlay2, Google Chromecast, Bluetooth, Spotify Connect and Roon (coming soon).

The AVM 70 a great way to bring premium audio to any home theater or media room. Seamlessly integrate your smart TV or projector with 7 dedicated 8K HDMI inputs that support 8K/60Hz or 4K/120Hz pass-through and 3 dedicated outputs with eARC. With AVM, you can enjoy 8K quality video from all of your 8K source devices in amazing clarity.

New features, capabilities and robust integration position Anthem AVM 8K Series as the ultimate power center of premium home theater and audio.

15.2 A/V Pre-Amplifier/Processor with Dolby Atmos, DTS:X and IMAX Enhanced. Includes ARC (Anthem Room Correction). HDMI 2.1, HDCP 2.3 supporting 8K/60Hz or 4K/120Hz.

Feel the power of every frame with the AVM Series and its advanced 8K HDMI 2.1 Platform with HDCP 2.3. Showcasing 7 dedicated 8K inputs which support 8K/60Hz or 4K/120Hz pass-through and 3 dedicated outputs with Enhanced Audio Return Channel, you can enjoy 8K quality video from all of your 8K source devices in amazing clarity. Also featuring the latest HDMI technology and specification, the AVM 8K Series allows you to take your home entertainment to the next level with HDR10+, Dynamic HDR10+, ALLM and VRR support. The possibilities are limitless; unlock the true potential of your media with the industry’s most flexible and feature-rich HDMI platform.

Experience Gaming Like Never Before on an AVM 70 8K

It’s never been a more exciting time to be a gamer. With the latest consoles offering up to 4K/120Hz graphics, realistic HDR and Dolby Vision dynamic range, and immersive Dolby Atmos sound, you have to make sure your Home Theater gear won’t hold you back. Enter the AVM 8K Series, our most feature-rich AV processors to date!

Our latest Anthem AVM Series 8K features external control and IP control capabilities for easy customization and compatibility with third-party integration solutions. It offers IP control capability for major third-party control devices including:

Anthem® MRX Series 7 Channels A/V Receiver

11.2 Pre-Amplifier / 7 Amplifier Channel A/V receiver with Dolby Atmos, DTS:X and IMAX Enhanced. 140-watts per channel continuous power into 8 ohms. Includes ARC (Anthem Room Correction). HDMI 2.1, HDCP 2.3 supporting 8K/60Hz or 4K/120Hz

New Anthem MDX Series are the first distribution systems to feature fully powered independent-zone subwoofer connections, as well as ARC® Genesis room correction for each zone.

Anthem® MDX Series 8 Channel Distribution System

Large power supply unit with 16,000 uF of reservoir caps to deliver that extra peak power during low frequencies and large transients.

Variable speed fan helps keep the unit cool no matter the load.

Heat pipe to share heatsinking capability of over 1 pound of aluminum so the heat dissipation can be spread across all zones and not put the burden on just the operating zones.

60W@8 ohms, 120W@4 ohms, 200W bridge mode low noise amplifier lets you connect a wide range of speakers and subwoofers for various configurations.

Shielded AC filter suppresses noise and keep your music true to the original content.

High performance DAC: 115 dB SNR, -107dB THD+N audiophile grade DACs gives you 2-channel performance in a distribution amplifier.

Fast and responsive ARM 32-bit processor which houses a micro website for setup and control allowing multiple simultaneous connections.

High performance ADC: 124 dB SNR, -106 dB THD +N lets you apply digital processing including ARC and bass management to your analog content without ruining its original integrity.

Optical and Coaxial (S/PDIF) receivers and Asynchronous Sample Rate Conversion handling up to 192-24 PCM (4 inputs) allowing you to play high res content in all rooms.

Up to 3.2 million instructions per second of DSP power for bass management, ARC, and more!

Fully buffered input stages (8 inputs) to isolate the sources from the amp and provide less distortion.

Trigger. RS-232 (Serial) and Ethernet (10/100 LAN) inputs with drivers for home automation. Free-of-Charge drivers for Crestron, Savant, Control4, URC, Elan, and RTI.

MDX Series features today’s cutting-edge Anthem amplifier technology so you can expect smooth, efficient, consistent high power and reliability. MDX Series is engineered to simplify your next custom audio system installation, and to blow your clients away with extreme performance in any setup.

Nothing could be simpler than on-site configuration and calibration using our intuitive Web-based controls.

The specially designed, adaptive user interface works on any device. Custom configure zones, from input assignments to zone names. Adjust levels (and every aspect of performance) independently.

Robust IP/RS-232 connection capability ensures compatibility with leading home automation systems, with easily downloaded drivers.

Fast, efficient Ultra-Class-D amplification is supported by proprietary Advanced Load Monitoring technology, delivering reliable performance under even the most demanding loads. Our high-efficiency design meets and exceeds global power-saving standards.

Smooth, instantaneous digital switching output allows the linking of digital inputs between multiple amplifiers and analog pass-through connections allow daisy-chaining of multiple MDX units.

Install and control subwoofers independently in separate zones, with dedicated outputs (both low and high level, including bridge mode), and zone-independent settings for the new, more advanced Anthem Room Correction (ARC® Genesis).

Toggle ARC Genesis on/off in each zone to hear the benefits of premium room optimization.

Zones can have custom names, multiple inputs, independent playback, and tuning controls. Bridge zones for more power. Enable subwoofer bass management in any zone, instantly set crossover frequency, level, phase, and polarity.

Only the MDX Series gives you this much control over multiple zones, supporting more creative system designs and more thrilling audio performance.

Full digital/analog matrix switching allows you to assign any analog RCA, digital coaxial or digital optical input to any output, either pre-configured via the web interface or switched in real-time via IP commands.

Drivers available for these systems: Control4™, Crestron®, RTI, ELAN®, Savent, URC®.

Channels / Zones

Power Output RMS per Channel (8 Ohm)

Power Output RMS per Channel (4 Ohm)

High Output Mode (Bridged) RMS per Channel (8 Ohm)

Frequency Response

Digital-to-Analog Converter

Inputs (analog)

Inputs (digital S/PDIF)

Inputs (network)

Inputs (trigger)

Inputs (other)

Outputs (speaker level)

Outputs (subwoofer)

Outputs (other)

Audio In-Out Matrix

Advanced Load Monitoring

Controls (via web-based UI)

Controls (back panel)

Room Correction

Microphone (for room correction)

Setup

IP Control (via IP or RS-232)

AC Voltage

Rack Mount Ears / Feet

Rack Space (feet removed)

Finish

Dimensions (H x W x D, with feet)

Shipping Dimensions

Weight

Anthem® MDX Series 16 Channel Distribution System

Output (analog, passthrough)

Outputs (digital matrix)

MDX-12 joins the Anthem MDX family as a simple, yet robust solution for powering distributed audio systems. With 75W of pure Anthem power available on all of its 12 channels, the MDX-12 is ready to bring your home to life.

Anthem® MDX-12 12 Channel Distribution Amplifier

In a market saturated with options, the MDX-12 stands out as the best choice for customers who demand both simplicity and excellence. It transforms the daunting task of powering distributed audio systems into a delightful, user-friendly experience, ensuring that customers not only get the best performance but also the most enjoyable journey with their music. The MDX-12 is more than a distribution amplifier; it's a testament to Anthem's commitment to delivering a superior audio experience, making it the perfect companion for those who seek the finest in both form and function.

With 75W x 12 channels at 8 ohms, or up to 150W x 12 channels at 4 ohms, MDX-12 brings the power, you just need to add control. Forgoing the built-in Matrix switching of its advanced siblings the MDX-8 and MDX-16, MDX-12 instead features 6 dedicated analog inputs assigned to each zone and 2 selectable global analog inputs. Simply add the sources or matrix of your choice and MDX-12 is ready to deliver true Anthem power to your speakers. While designed for distributed audio solutions, MDX-12’s robust power output also makes it suitable for adding extra channels of power to a Home Theatre system.

Occupying just a single 1U rack space, the MDX-12 boasts a highly efficient compact power supply, capable of delivering up to 1,000-Watts within its sleek chassis. Engineered by Anthem, this amplifier is designed to accommodate various custom speaker setups, offering up to 75W at 8 ohms and 150W at 4 ohms across its 12 channels of power. For those seeking even greater power, the MDX-12 allows for channel bridging. When bridged, it delivers an impressive 280W at 8 ohms. Despite its potent performance, the MDX-12 remains cool under pressure thanks to its fan-cooled design, ensuring uninterrupted power delivery even in the most demanding scenarios.

Distribution amplifiers are often seen as generic or mass-produced commodity items that compromise on both design and quality. However, at Anthem, we prioritize performance above all else. This commitment is evident in the meticulous design and engineering of the MDX-12, a product crafted to deliver unparalleled audio quality tailored to custom install applications. With an impressive THD of 0.002% and a high-efficiency compact power supply capable of delivering up to 1,000 watts, the MDX-12 ensures a blend of superior quality and ample power, all while taking up minimal space, making it the ideal choice for your custom installation needs.

Built-In Protections For Uncompromised Performance

MDX-12 utilizes integrated amplifier chips with built-in safeguards, including protections against out-of-range current, temperature, and voltage conditions. Additionally, the amplifier features multiple thermal sensors strategically placed on the board to monitor temperature fluctuations. These protective measures ensure reliable performance and prevent damage to both the amplifier and connected speakers, making the MDX-12 suitable for distributed audio systems in diverse environments while maintaining optimal safety and quality standards.

By design, P2 and P5 amplifiers are powerful independent “mono block” amplifiers. Each channel is self-contained on its own glass-epoxy circuit board and heatsink and benefits from an independent power supply. Since there is no common audio path between c

Anthem® Statement P Series 2 Channel Power Amplifier

In life we admire “heart.” When we say someone has heart we mean passion, spirit, fortitude. And we applaud it. While the amplifier is the brawn behind every successful music and movie presentation, it is also the heart! Its role is as crucial as that of the speakers in its ability to render delicate musical detail one moment and deliver room-shaking explosions the next. The most exquisite piece of music falls flat without clean, quiet power to sustain it through to its natural, musical ebb. Movie special effects require an inordinate supply of stable, high current power to give visceral credibility to the “special” aspect of each effect! In fact, all truly successful sound reproduction requires “heart.” The heart of an amplifier rests with its design and it is here that P2 and P5 amplifiers reveal their high-end lineage: multi-layered, hand-designed circuit boards with thick copper traces; rugged, independent power supplies with tuned toroidal power transformers for each amplifier channel; fourteen rugged bipolar output devices per channel; custom-designed convection-cooled heatsinks with serrated fins; a “no-fuse” design strategy. And the list goes on.

By design, P2 and P5 amplifiers are powerful independent “monoblock” amplifiers. Each channel is self-contained on its own glass-epoxy circuit board and heatsink and benefits from an independent power supply. Since there is no common audio path between channels there is a complete absence of crosstalk.

Frequency-response channel matching is superb. The musical picture is seamless and exquisitely detailed with a multichannel soundstage that is astonishingly transparent, cohesive and three dimensional.

Cascoded Complementary Feedback Input Stage

P2 and P5 amplifiers benefit from our proprietary input topology—a unique departure from the classical differential input stage. Eight low-noise bipolar input devices, hand-matched for superior balance, are configured in a complementary active-load cascoded feedback arrangement. Heat shrink tubing applied around each critical input pair ensures superior thermal tracking.

Designed to reduce distortion, this arrangement not only ensures exceptionally linear response, but also superior bandwidth and superb amplifier reliability.

P Series amplifiers are the cleanest, quietest amplifiers in the industry. Each amplifier channel features two separate and autonomous power supplies fed from separate transformer windings. The amplifiers are thus able to deliver stable, continuous power at maximum output, regardless of the number of channels being driven.

While some amplifiers tend to oscillate when driving lower impedance loads, the P2 and P5 remain perfectly stable under all conditions. If pushed into clipping, the proprietary anti-saturation tracking power supply circuit takes over to ensure a seamless recovery.

Since the use of a regulated power supply in the driver stage removes noise emitted by the bridge rectifier (often heard as an audible hum at 120 Hz and its harmonics), the P2 and P5 achieve an utterly silent noise floor.

Conservatively rated, in a low-profile design, these low-impedance toroidal power supplies—one per amplifier channel—make no sacrifices when it comes to delivering a continuous supply of pure, clean low noise power.

They are shaped to minimize hum while a sequence-controlled soft turn on significantly reduces power line transients and in-rush current during start up, thereby preventing accidental tripping of the circuit breakers.

By design, P2 and P5 amplifiers are powerful independent “mono block” amplifiers. Each channel is self-contained on its own glass-epoxy circuit board and heatsink and benefits from an independent power supply. Since there is no common audio path between channels there is a complete absence of crosstalk.

Connector Type:

Signal to Noise Ratio:

Anthem® Statement P Series 5 Channel Power Amplifier

Fourteen Bipolar output Devices Per Channel

An amplifier’s ultimate performance is directly related to the number of high-quality, high-current devices used in the output stage. The greater the number of devices employed per channel, the greater the available power to deliver the crescendos in music and the thunder and explosions in movies. And the greater the amount of current that can be held in reserve.

While some manufacturers cut corners to save costs in this area, our designers incorporated fourteen bipolar output devices per channel. This results in tremendous current held in reserve.

Our two-layer military-spec (FR-4-rated) glass-epoxy circuit boards feature plated through-holes and 2-ounce copper traces, promoting excellent conductivity.

Extensive use of power and ground planes ensures exceptionally low noise and increased protection from stray electromagnetic energy— internally as well as externally from other devices.

P2 and P5 amplifiers are Direct-Connected to the power supply capacitor bank. This keeps output impedance remarkably low while making more power available to the amplifier. Even when driving lower- or complex impedance loads, the result is audibly superior performance. If an output short circuit does occur, only the AC line breaker will trip—there are no fuses to replace.

The standby low-power supply is protected by self-resetting Positive Temperature coefficient thermistors (PTCs). Once the condition that tripped the PTC disappears, the circuit restores itself automatically.

Our custom-designed binding posts are easy to use, ensure full power delivery at all times and facilitate large speaker cable connectors.

P2 and P5 amplifiers can be powered On/Off three ways: Manually, with the On/Off switch on the front panel; Remotely, via the 12-volt trigger input on the rear panel; Automatically, with our patented Auto-On/Off circuit. Auto-On turns the amplifier on when it senses an input signal and turns off 20 minutes after the input signal ends.

A three-way switch on the amplifier’s rear panel offers an RCA input, a professional quality XLR balanced input and an attenuated XLR balanced connection (for preamplifiers that require it). Gold-plated female RCA jacks and gold-plated XLR balanced connections provide the highest quality input connections.

With more than 1125 square inches (7258cm2) of computer modeled heatsink (including large serrated fins) per channel, P2 and P5 amplifiers are superbly equipped to dissipate the heat generated by their high power levels. This, in turn, eliminates the need for noise-inducing cooling fans. A thermal sensor on each heatsink continuously monitors safe operating temperature.

Fine-grain brushed aluminum cover and extruded aluminum handles. Heavy-gauge, low-resonance 12-awg steel chassis and oversize aluminum heatsinks generate serious high-end weight and authority.

IEC AC female sockets and detachable high-power, high-quality 14-awg AC power cords. Can be ordered with rack-mount handles.(See Dealer for more information.)

Power On Consumption (watts):

Watts RMS per Channel (4-ohms):

Watts RMS per Channel (8-ohms):

The highest sound quality at all volume levels, flat frequency response into any load, and stable into the most difficult loads. The Statement M1 is a state-of-the-art monaural amplifier delivering 1,000 watts into 8 ohms and 2,000 watts into 4 ohms or le

Anthem® Statement M Series 1 Channel Preamplifier

Full resolution of all of the sonic subtleties and complexities in the input signal.

Accurate reproduction of the full dynamic range of the signal.

Flat frequency response into any load, without having to resort to digital conversion or equalization to compensate.

Stable into all loads including open circuit and short circuit.

Exceptional efficiency with low heat output.

An amp so mechanically silent it will suit even the quietest listening room.

A design that allows multiple units to be stacked with no danger of overheating.

All of the above delivered at a price point that while not inexpensive, delivers virtually limitless dynamic fidelity.

Lower voltage MOSFETs can be used for lower resistance and higher speed. Although more expensive since more MOSFETs are needed, sound quality is vastly improved.

Because the load is balanced, output current goes from one rail to the other without disturbing the ground plane. A balanced load also provides more efficient use of the power supply. Rail voltage is stable, unlike in single-ended Class D amps which suffer from rail pumping at low frequency and high power.

Power supply capacitors become more efficient because bridging doubles the ripple frequency while impedance and ripple voltage are halved, allowing the power supply capacitors to be more efficient.

For a high-power amp such as the M1, bridging can be safer. The differential output voltage can reach over 90 Vrms but at this level each output terminal is only 45 Vrms with respect to the chassis.

Hand-designed 4-layer FR4-rated glass-epoxy circuit board with 2-ounce copper traces promotes exceptional conductivity.

Extensive use of power and ground planes ensures vanishingly low levels of noise and inductance to produce an amp that gets out of the way, leaving only the sound of the music.

Each of the eight 65-amp MOSFETs can handle a peak current of 260 amperes, has low gate charge for fast response, low channel resistance for high efficiency and high speed for high efficiency and low distortion.

No relays are used in the signal path preventing any possibility of relay failure.

The highest sound quality at all volume levels, flat frequency response into any load, and stable into the most difficult loads. The Statement M1 is a state-of-the-art monaural amplifier delivering 1,000 watts into 8 ohms and 2,000 watts into 4 ohms or less with THD remaining under 0.1% from 20 Hz to 20 kHz. Designed and engineered in our advanced research center in Ottawa, Canada, the M1 is manufactured in our Toronto facility.

More than just a slim, technologically advanced monaural design, the M1 demonstrates that Class D architecture isn't fundamentally flawed, it simply hasn't been implemented well in the past, mainly because it required such a heavy commitment to R&D. We’re fortunate to have the in-house resources to create such a groundbreaking product and one listen will reveal the truly extraordinary nature of this amplifier.

The M1 enjoys all of the attributes of our award-winning Statement Class AB amplifiers but through exclusive Anthem technologies, goes far beyond the current capabilities of Class A, Class AB and prior Class D amplifiers in the market.

The proprietary design employs all of the advantages of a Class D amplifier — high output, high efficiency, compact size — while avoiding the typical Class D limitations such as difficulty driving low-impedance (high-end) speakers, power line contamination, reliability issues and substandard audio quality. The absence of accurate dynamics is so common that it frequently goes unnoticed, but through the M1, music and movies are delivered with breathtaking realism.

The “D” in Class D does not stand for digital. It was simply the fourth type of amp recognized and classified by the IEEE. The first was Class A, the second Class B, the third Class C, etc.

Contrary to the bias that exists among high-end enthusiasts and across the industry in general, the Class D design is not inherently flawed. The truth is that no existing designs have been able to reach the Class D's inherent potential for performance. It is not the technology that yields fine audio performance but rather the implementation of the technology. At Anthem, we agree that most Class D amplifiers are poor performers. However the M1 uses Class D amplification of a different ilk (see later section on Class D for a full discussion).

There are no A/D or D/A converters in the signal path. The amplifier’s control system continuously varies the width of the output pulse train in direct relation to the analog input signal. In essence, a side-to-side variation in width is analogous to a signal’s more familiar up-and-down amplitude variation, not at all the same as a digital string of 1s and 0s where all pulses have the same width.

Much has been written about Class D amps having twice the efficiency of conventional amplifiers at full output, but there's more to this. Under normal conditions an amplifier operates at only a fraction of its full output capability. At 1/8th of its maximum output (the typical working level of an amplifier), our M1 is six times more efficient than a conventional amplifier.

Never judge an amp by its size or its rack space

Amplifiers are often judged by their size and weight, the beefier the better since more power requires a physically heavier, larger amplifier. Or does it? It all depends on the design. When rack-mounted, the 20-kb M1 occupies only one rack space but despite its size can deliver 1,000W into 8 ohms and 2,000W into 4 ohms.

The M1’s cooling system quickly and efficiently moves heat from the interior of the amplifier to exterior heat sinks. Sealed copper pipes within the amp contain a small amount of special fluid held under a vacuum. When the temperature at one end of the pipe rises — the end adjacent to the amplifier's heat sources — the fluid in that end evaporates. This vapor is then naturally drawn to the cooler end of the pipe, along the heat sink on the side of the amp’s chassis where it condenses. From there a copper wick returns the fluid to the hotter end of the pipe. This heat transfer process is many thousands of times faster and more efficient than cooling through metal heat sinks alone. This system eliminates the need for fans, allowing multiple M1s to be stacked with no danger of overheating. It also means the amplifier is so mechanically quiet it will suit even the quietest listening rooms.

With an absence of noisy fans and a noise floor well below that of a high-end preamplifier, the M1 is a critical listener's dream.

The M1 has a very sophisticated load monitoring system. Two 100A Hall-Effect sensors monitor the output current. A Digital Signal Processor, outside the signal path, is used for power sequencing and to monitor various amplifier and power supply functions including line voltage, output current, ground fault detection, temperature and DC voltage at the output.

The M1’s output stage does not interact with the load. A hysteric PID controller which uses past, present and a predicted future to make adjustments keeps the amp load independent. Hundreds of computer simulations were used to test and optimize this system so that it is able to handle all possible loads. This is a significant design achievement. Whether you are running the M1 from a 120V circuit or a 240V circuit, the amplifier will be delivering the highest output possible according to the operating conditions.

Power Factor Correction (PFC) maximizes available power and at the same time reduces (by a large amount!) the noise put on the AC line. Without PFC, the input current can flow and charge the capacitors only during the short moments that voltage is at or very close to its positive or negative peak. Since power is the product of both voltage and current it is produced only when both are present. Power Factor Correction marries the voltage and current cycles enabling continuous output from the power supply through the entire AC cycle. In doing so, the load appears almost purely resistive to the AC source. (See diagrams to right)

Why doesn’t the M1’s power cord have a third prong?

Although more difficult and expensive to implement, Anthem has always used 2-prong AC cords to make installation easier. A 3-prong cord is prone to ground loops if the system includes other 3-prong equipment or cable/satellite TV. For example: If the preamplifier uses three prongs it is grounded not only through its power cord but also through any non-optical connections to other 3-prong components. This can result in humming or buzzing through the speakers as well as video noise problems. The more elaborate the system, the greater the chance of a ground loop. With 3-prong equipment, balanced XLR interconnection is needed throughout and that type of interconnection is not always possible.

With a 2-prong cord, safety is maintained through either double or reinforced insulation. The next time you see a corded power tool, look for the double-square symbol. It requires more expensive wires on the live side and greater distance between live circuits and isolated circuits and chassis. The distance requirement also applies to spacing inside transformers, making them larger and more expensive. A 2-prong cord also requires a larger line filter because according to safety standards the line-chassis leakage current limit is ten times lower compared to 3-prong. Ironically, a higher leakage current allowance aggravates hum problems in 3-prong systems.

To clear up any final misconceptions, the earth ground provided by the third prong is not meant as a shield, it is a safety measure meant to trip breakers should a chassis become live as a result of coming into contact with a live wire.

Speaker Connectors:

The STR Power Amplifier is the beating heart of a world-class 2-channel sound system. It delivers massive power generation, with audiophile-quality output in a smartly designed component.

Anthem® STR Series 2 Channel Power Amplifier

Cascoded complementary feedback input stage

Sixteen bipolar output devices per channel

Graphic front panel display for the power meter, status, and easy setup navigation

Inside, the STR Power Amplifier uses two colossal transformers and multiple high-current output devices so the most subtle details and dynamic peaks are handled equally well. Outside, its beautifully designed cosmetics, including a 7-inch graphic control display and secure, highly conductive audiophile connectors provide a perfect match to the STR Preamplifier.

Designed, engineered, and Crafted in Canada, the STR Power Amplifier delivers 400 Watts/channel into 8 ohms with both channels driven, a massive 600 Watts/channel into 4 ohms (both channels driven) and 800W in 2 ohms, for true no-holds-barred performance.

The STR Power Amplifier benefits from our proprietary input topology—a unique departure from the classic differential input stage. Eight low-noise bipolar input devices are configured in a complementary active-load cascoded feedback arrangement for reduced distortion, exceptionally linear response and superior bandwidth. Transistors in critical stages are hand-selected and matched for lowest possible distortion.

Sixteen Bipolar Output Devices Per Channel

Anthem engineers incorporated sixteen bipolar output devices per channel, resulting in peak production that is effortless and instantaneous, cinching even the most challenging material. The use of multiple bipolar output devices in class AB configuration also dramatically reduces distortion while ensuring extreme linearity, extensive bandwidth, and stress-free reliability.

Experience the immense dynamics of up to 800 clean watts delivered into demanding 2-ohm loads, or 400W into 8 ohms/600W into 4 ohms continuously and with both channels driven.

Conservatively rated, in a low-profile design shaped to minimize hum, the low-impedance toroidal power transformers — one for each channel — make no sacrifices when it comes to delivering a continuous supply of pure, clean, low noise power. As well, both the power supply impedance and internal cabling inductance are minimized to deliver a clear path for maximum power.

The amplifier channels are thus able to deliver stable, continuous power at maximum output without affecting one another, even when driving the lowest impedances. While some amplifiers oscillate or run out of power when driving lower impedance loads, the STR Power Amplifier remains perfectly stable under all conditions.

A sequence-controlled soft turn-on significantly reduces power line transients and in-rush current during start up, thereby preventing accidental tripping of circuit breakers.

The amplifier sections are Direct Connected to the power supply capacitor bank. This keeps output impedance remarkably low while making more power available to the amplifier. Even when driving lower or complex impedance loads, the result is audibly superior performance.

In addition to the traditional options for power-on, the STR Power Amplifier allows trigger mode and audio signal sensing to be combined so you would never need to think about turning the amplifier on or off manually. This can be useful when using a preamp with Home Theater Bypass mode together with a surround sound processor in the same system.

The STR Power Amplifier is designed, engineered and manufactured in Canada and is part of premium STR Series by Anthem, the leader in audio power and control.

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