Grandioso M1

Audio expression, symphonic beauty, artistic passion, a concert hall spatial feel, the excitement of the audience. Esoteric’s Master Sound Works is an audio product concept that recreates all of the music information in original master recordings with the most state of the art technology available today.



Music overflowing with life. Spacious sound that can only be achieved by a high-power amplifier.

That moment when the sound is released from the speakers and the presence of the audio system disappears from before your eyes: This is the most thrilling moment of the listening experience. The overwhelming feeling of the spaciousness of sound and sense that the sounds are being generated live are enabled by the output wattage surplus power of the amplifier. The introduction of far-superior materials, such as large bipolar transistors with instantaneous 34 ampere capacity, that first enabled us to achieve 300 watts at 8 ohms high power. For a rich feeling of life, ESOTERIC’s flagship power amplifier M1 communicates the music by vibrantly setting all of the sounds free.

1200 watts at 2 ohm power linearity to amplify to the limits of sound dynamics.

Speaker impedance changes drastically along with changes in the frequency of the sound being played. In cases such as continuous heavy bass or the impact and subsequent silence of a percussion instrument, impedance can abruptly drop and cause a situation where there is almost no load. The full expression of sound dynamics is not possible with these sudden changes in load unless there is a current supply capacity that can be constantly followed linearly. The best materials possible have been used for the M1 power supply unit to achieve theoretical-value power linearity from 300 watts at an 8 ohm load to 1200 watts at a 2ohm load. Sound dynamics are faithfully reproduced at all volume levels.

High-capacity custom power transformer forms the core the ESOTERIC power amplifier.

The decisive element in the M1’s amazing linear high-power performance is the design of its strong power supply unit. ESOTERIC has long believed that the power transformer is the most important factor in sound design of an amplifier. The key to the overwhelming power and rich sound quality of the M1 amplifier is a custom-built ultra-large toroidal core transformer with a 3057VA core size and a mass of approximately 18 kg. Following ESOTERIC tradition, the bare (no-case) mount specs give top priority to sound quality. In order to make the fullest use of transformer performance capable of instantly supplying power from primary to secondary, the power supply unit features 16 pieces of 3,300μFF capacitors in 8-parallel configuration, with the shortened voltage charge time contributing to high-speed sound quality.


Breathtaking speaker-driving power worthy of a flagship amplifier.

An amplifier drives the speakers by sending music information converted into electric current. The mechanism by which the amplifier drives the speakers is extremely simple, but considering that the current ranges from very weak to very strong, it is a near impossible task to accurately drive the speakers in a way that is always faithful to the music signal. In order to heighten the amplifier’s ability to drive the speakers, it is necessary to find ways to reduce amplifier output impedance to an absolute minimum. In order to achieve low impedance, our full range of expertise was poured into the M1 to enable the use of a total of 16 busbars in the amplification stage and to eliminate the output stage coil, and exhaustive efforts were made to simplify the circuit design. The result was the achievement of the phenomenal figure of 1,000 for DF (damping factor), which can be consider a guideline value for woofer drive capability. Even large-diameter woofers that are notoriously difficult to drive achieve accurate damping, and sound is precisely reproduced with a voluminous feel across a wide range extending to the lowest frequencies.

A superior S/N:122dB is achieved at the input stage of the full-balance configuration.

When designing the amplifier for signal amplification in the M1, maximum attention was given to noise processing. Bringing together circuit design expertise cultivated since the very start of ESOTERIC, we adopted a full-balance input stage that was achieved as a result of painstakingly detailed designs. The signal is received by dedicated input buffer amplifiers (totally balanced design) in each input channel (RCA×1, XLR×1), with low-impedance and full-balance transfer on the signal path up to the amplification stage. By eliminating common-mode noise and making the signal path resistant to the effects of noise, we maintained signal transfer purity up to the amplification stage, thereby achieving S/N ratio for a superior auditory feel. The overwhelming auditory dynamic range created through the amplification of a clean no-noise signal promises the listener a level of excitement that transcends spec values. The M1 does not give you just the dynamic expression of a high-power amplifier. It also has the extreme sensitivity needed to give you more nuanced gradations in between musical climaxes and silences.

Rated output power 300W(8Ω)
Maximum output power 1200W(2Ω)
Frequency response 5Hz ~ 100kHz (+0dB,-3dB,6Ω)
Signal-to-noise ratio (S/N) 122dB (IHF-A)
Total harmonic distortion 0.006% (1kHz,8Ω,300W)
Gain 28dB
Damping factor 1000
Analog audio input jacks RCA×1
Input impedance RCA:1MΩ
Power supply / Power consumption AC 230V 50Hz / 430W (no signal: 44W)
AC 120V 60Hz / 520W (no signal: 58W)
AC 220V 60Hz / 430W (no signal: 44W)
External dimensions (W x H x D) 491×221.5×535mm
(19 3/8" x 8 3/4" x 21 1/8")
(including protrusions)
Weight 62kg (136 3/4 lb)
- This product is available in three different power supply variations shown in the chart above.Make sure that the voltage shown on the rear panel matches the AC line voltage in your area.
- the shape of the AC inlet and plug of the supplied power cord depends on the voltage rating and destination country.
- Specifications and appearance are subject to change without notice.
- Weight and dimensions are approximate.

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