GRANDIOSO M-1 Monoblock Amplifier

SKU: M-1 Category:


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.

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.

Additional information


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)


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