A load-monitoring system, based on "a digitally modeled time constant of the circuit interruptor," allows large current surges that aren't long enough to result in excessive heat. When it is, the M1 will simply shut down and resume playing a few seconds later. I ran the M1s both ways and could hear no differences. The resulting pulse-density (not pulse-width) modulated output is claimed to achieve a practical time resolution of 4 nanoseconds (0.000000004s), which is more than an order of magnitude better than that of the DSD coding used on SACD. The more elaborate the system, the greater the chance of a ground loop. circuit, the amplifier will be delivering the highest output Ironically, a higher leakage current allowance aggravates hum problems in 3-prong systems. If they are using Bruno Putzeys' Hypex modules, then yes, a class-D amplifier can be made to work successfully. For a high-power amp such as the M1, bridging can be safer. first was Class A, the second Class B, the been able to reach the Class D's inherent potential for In the audio press and across the Internet many generalizations have been made about deficiencies in Class D amplifier design. It’s immensely powerful, and goes exceptionally loud without any obvious drama, even when driving a known ‘difficult’ load, while the casework and heatsink fins remain merely warm at all power levels. Class D architecture provides value over traditional Class A and Class AB designs because of its efficient output and smaller form factor, both of which the M1 perfectly embodies, The Anthem M1’s bass, however, didn’t bowl me over at first. View and Download Anthem Audio M1 operating manual online. Second, in addition to the well-known efficiency of class-D circuitry, the M1 has an internal heat-pipe cooling system that allows multiple M1s to be stacked without the need for fans or bristling arrays of heatsink fins. But see my Devialet review in the January 2013 issue (due to hit newsstands next week) for one successful approach. fluid held under a vacuum. Happening on this flat, black slab of an amplifier lying on a display table or bolted to a wall, reminded me of the appearance of the iconic monolith in Stanley Kubrick and Arthur C. 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As a result, while the M1 can put out 2kW continuously into 4 ohms when fed by 240V mains, it can still put out 2kW for the duration of typical musical peaks when fed by a dedicated 120V 15A line, without causing circuit interruption. It is pulse density modulation which is digital, meaning discrete in time. The first was Class A, the second Class B, the third Class C, etc. Class D amplifiers suffer from ‘dead time,’ an ugly form of crossover distortion. Rail voltage is stable, unlike in single-ended Class D amps which suffer from rail pumping at low frequency and high power. Anthem M1 Statement Power Amplifier. When Actually, leaving aside the burn-in question in general, which I find varies from insignifican to significant depending upon the gear, I do not always find it positive. First, let's take a look at the amplifier. That means that you get 1000W into 8-ohms, but 2000W into 4-ohms. "On class-D amplifiers, I feel that their promise has mostly yet to be fulfilled.". Sealed The M1s seemed to give greater rein to the Columns' already very lively dynamics, but also gave a bit more depth to the soundstage, a bit more presence to the low voice range, and noticeably more power to the very bottom of the bass. to be stacked with no danger of overheating. Feedback is after the output filter, thus already taken into account. This is not the first review to find problems with the M-1 btw. A Digital Watch our information and product videos on YouTube. It requires more expensive wires on the live side and greater distance between live circuits and isolated circuits and chassis. 1-bit DSD pulse width modulation used by SACD operates at over 2.8 MHz which is seven times the rate used by the typical Class D amplifier. Get the latest news and special announcements on our official Blog. Hundreds of computer simulations were used to amplifier’s control system continuously varies the width of the In fact, the general description of "burn in" is that the device seems to settle in to its ideal performance disposition and that it is unfair to judge it before then. The effect was immediately appealing and encouraging, but all too soon the Columns had to be sent to John Atkinson to be measured, and then back to the distributor. That's quite an advantage. Keep up with everything Anthem on Twitter. After plugging the interconnects into the XLR inputs and attaching the speaker cables, I left each M1's gain-attenuation switch at 0dB to match the gain of my other amps, and set the M1s' On mode to Auto so that the amps would turn themselves on when they sensed the presence of a signal. Also a minor typo: a price discrepancy: "costs $3499 each, $7498/pair" the specs section has what appears to be the  correct price though. despite its size can deliver 1,000W into 8 ohms and 2,000W The highest sound quality at all volume levels, flat frequency response into any load, and stable into the most difficult loads. I have been looking at Class D amps for a tri-amplified system using the DEQX as a base for xover and dsp (not the digital preamp feature). Imam Bonjol No.121-125, Nagoya 29432 Batam product of both voltage and current it is produced only when But the Tripath and Icepower modules I find disappointing on technical grounds. naturally drawn to the cooler end of the pipe, along the heat hysteric PID controller which uses past, present and a I auditioned a pair of Anthem Statement M1 Mono blocks last year at my local dealer. November 1997. With the M1, it’s exactly the opposite situation because a linear supply cannot regulate the output voltage of the output stage. Much has been written about Class D amps having twice the Power Amplifier. amplifier is so mechanically quiet it will suit even the quietest 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. Manuals, Literature & Remote Control Codes. and certainly has its benefits in getting a lot of power out of a small package. Because the load is balanced, output current goes from one rail to the other without disturbing the ground plane. Each M1 arrived in what looked like an outsized pizza box 2' square and 6" thick, suitable for the very largest, deep-dish, meat-lovers' pies. Operation is discrete with output MOSFETs mounted on a copper clad PCB, then on a heavy aluminum extrusion with heat pipes. Under normal conditions an amplifier operates at Whether you are running the M1 from a 120V circuit or a 240V A design that allows multiple units to be stacked with no danger of overheating. One cord is a three-pronged 20A/240V cable, the other a two-pronged 15A/120V cable, with a two-conductor IEC connection at the amp end. 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. In any case, the M1’s time resolution is well below noise floor limits and theoretical arguments are a wash when compared to the actual listening test results done in real world setups. Paradigm/Anthem's Rob Sample gives us an inside look (literally) at the 1000 watt M1 Statement mono amplifier. 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. Thank you kindly for your review of the Anthem M1 monoblocks. As we all know, great for subwoofer amps. If so, how does it know to stop? 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. Despite being an audiophile for 15 years, I have never been known as a tube-guy.Other guys at SoundStage! DSD is not pulse width modulation. capacitors only during the short moments that voltage is at or Third, in contrast to most other class-D amps, which are based on a handful of commercially available core circuits or already populated circuit boards, Anthem claims to have created the M1 entirely in-house. "That is one reason why I am convinced that the vast majority of these reports are due to observer adaptation. It is not the technology that yields fine audio Its time resolution is limited to around 350 nanoseconds. If you don't use your ears, is there another way to experience an an audio product? When the temperature at one end The manual indicates that the M1's continuous high-power output depends on the power supply, but offers a single set of specs without regard for the AC input. This is 87.5 times better than SACD. While one cannot turn these off, a good listener should have a decent awareness of how they determine what we perceive. I asked Anthem how best to set up three M1s with my two 15A lines. Power Factor Correction marries the voltage possible according to the operating conditions. The Well, experience can encompass an interaction via any of our senses but, yes, our ears are the primary interface. I look to use the M1 for my bass drivers moving to tube for mid/trebile in 3 … only a fraction of its full output capability. functions including line voltage, output current, ground fault The M1’s cooling system quickly and efficiently moves heat Anthem is now shipping the Anthem Statement M1 Amplifier. However, our conscious experience via our ears (or any other sense) is always filtered by brain mechanisms that are hard-wired and/or functions of experience and mood. there a copper wick returns the fluid to the hotter end of the Designed and engineered in our advanced research center in Ottawa, Canada, the M1 is manufactured in our Toronto facility. Left: Power supply without PFC. Lower voltage MOSFETs can be used for lower resistance and higher speed. It was simply the fourth type of amp the better since more power requires a physically heavier, amplifies) the power of the audio signal to levels suitable for driving speakers. While such generalizations may hold true for other brands of amplifiers, below, Anthem responds to each one as it relates to our M1. output pulse train in direct relation to the analog input signal. Wyred4sound kind of tried to kick it off, for the masses, but still a bit (niet). With several designs high DC potential is present on the outputs. Amplifiers are often judged by their size and weight, the beefier 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. I have been looking at Class D amps for a tri-amplified system using the DEQX as a base for xover and dsp (not the digital preamp feature). Setup was uneventful. of a high-end preamplifier, the M1 is a critical listener's dream. Purely capacitive and very capacitive loads will send the M1 into protection mode, not burn out mode but since no speakers are purely capacitive this will never be an issue. The Anthem Statement M1 Amplifier. Anthem claims that the M1 is on that cutting edge. As good as it gets! At 1/8th of its recognized and classified by the IEEE. Power Output continuous, 20 Hz to 20 kHz, : 0.1% THD+N: 8 Ω: 1000 W: 4 Ω: 2000 W: 3 Ω: 2400 W: 2 Ω >2000 W depending on line voltage regulation: With 120V AC supply the amplifier’s maximum output into impedances 4 Ω and lower, as well as its maximum duration, vary depending on line voltage regulation. Frequency response is affected by input circuits that are highly sensitive to stray high frequency signals. Full resolution of all of the sonic subtleties and complexities in the input signal. 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. I also heard the new Cyrus MonoX 300 and Bryston 4BSST2 at … Hand-designed 4-layer FR4-rated glass-epoxy circuit board with 2-ounce copper traces promotes exceptional conductivity. Anthem M1 1000W State of the Art Mono Power Amplifier : The highest sound quality at all volume levels, flat frequency response into any load, and stable into the most difficult loads. signal’s more familiar up-and-down amplitude variation, not at Anthem Statement M1 Amplifier Redefines Class D Category. efficiency of conventional amplifiers at full output, but there's Isn't all about how it "sounds"? inherently flawed. Anthem is launching its Statement M1 power amplifier in the UK from November, priced at £3499.It's a Class D monobloc amplifier aimed primarily at the custom install market, hence its slim design. With the three M1s neatly stacked, their potential to provide three channels of 2000W each into 4 ohms seemed almost a boast—they're smaller and lighter than my regular class-A/B amps, which output 250–300Wpc. The M1's appearance and heritage, and the prospect of nearly limitless power, made the wait for its delivery seem, as when one orders out for dinner, much longer than it was. First, the ratio of the M1's power output to its size and weight is remarkable, as are its claimed distortion and noise specs. Anthem AV Solutions Statement M1 A year or so back I purchased a pair of monoblock power amps. I respond to this review as I am looking at this Anthem product reviewed with near perfect technicial measurements. Since power is the Stereo Design Anthem Statement M1 Amplifiers in HD - YouTube 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. Frequency response in the M1 is +/- 0.1 dB from 20 Hz to 20 kHz and -3 dB at 45 kHz, well beyond the limit of audibility. 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. Class D amps use circuits with poor high-frequency resolution resulting in high intermodulation distortion. "Ever notice how the effect of burn-in is always positive?". The voltage and current waveforms are sinusoidal and in-phase. sequencing and to monitor various amplifier and power supply Having read this review and the Mark Levinson review above, I'm having my doubts about class-D. Specs Number of Channels: 1 Rated Power (watts per channel): 1,000 watts into 8 ohms; 2,000 watts into 4 ohms; 2,400 watts into 3 ohms Specified Frequency Response: 20 Hz to 20 kHz ±0.1 dB Dimensions (W x H x D, inches): 19.25 x 2.25 x 18.75 I appreciate your efforts in this review, When I first saw Anthem Statement's M1 at the 2011 CEDIA Expo, it was a bolt from the blue. With an absence of noisy fans and a noise floor well below that Second, in addition to the well-known efficiency of class-D circuitry, the M1 has an internal heat-pipe cooling system that allows multiple M1s to be stacked without the need for fans or bristling arrays of heatsink fins. No, the 47lab Gain Card is a Class AB chip amp. The very poor SNR and high ultra-sonics at 400kHz is inexcusable from a company like Anthem as i own their D2v prepro which is an excellent product IMHO. predicted future to make adjustments keeps the amp load independent. It is interesting to follow class D technology to see where its going. The more I learn about how class-D works the more I appreciate how hard it is to get it right. Of course, the Anthem solution is different and resolves these problems. Each has a solitary output PX4 triode valve, originally introduced in 1929, and each amplifier was reputed to deliver around 3.5W. same time reduces (by a large amount!) I suspect that your observations are a combination of some small effects and good observation. The M1 can deliver 2 kW continuously when fed by 240V mains and 2 kW for several seconds when fed by a dedicated 120V 15A line. supply through the entire AC cycle. performance. Class D output stages have thermal dissipation issues due to the small size of the power module. The single rack unit Class D mono power amplifier outperforms its class with sophisticated monitoring circuits that maintain proper frequency response, even when powering the heaviest speaker loads using a … ANTHEM STATEMENT M1 The Anthem Signature M1 does a number of things very well indeed. Designed and engineered in our advanced research center in Ottawa, Canada, … Although it is normally the case, assuming noticeable burn-in, I have encountered several pieces that went from being engaging to too polite. The odds are stacked against the Class D amp designer. Class D amps negatively affect dynamic variations in clarity and focus. Its true from what i can see from the measurements that this Class D amp is not ready for prime-time. Anthem claims that the M1 is on that cutting edge. 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