The S-05 is a stereo power amplifier that incorporates the development results of the flagship model Grandioso M1X. It is a class A power amplifier with a stereo configuration that thoroughly focuses on the unique tone that can only be expressed by this model, while keeping the concept of "simple circuitry and powerful power supply" of the M1X. The main features are the simple and straightforward circuit design concept that follows the Grandioso M1X. In addition to the precision of class A, it pursues the dynamic sound quality that is unique to ESOTERIC. In order to thoroughly separate the L/R channels, all stages from the power smoothing circuit are configured as dual mono. The unique current transmission "ES-LINK Analog" input transmits the energy of music without leaving anything behind. Large-capacity bipolar transistor 3-parallel push-pull configuration pursuing instantaneous response. Large-capacity 940VA EI core power transformer that is extremely responsive to changes in dynamic current supply. Large-capacity Grandioso-grade custom block capacitors (10,000μF x 4/ch) for each channel. A highly stable balanced input amplifier that is resistant to common mode noise. Two modes are adopted: BTL drive that emphasizes high output, and bi-amp drive for pure sound from multi-way speakers. By combining two units, it is possible to further improve the system. Power on/off can be linked with the N-05XD by trigger connection. Semi-floating top panel, specially designed isolation foot to reduce mechanical stress. A special wave-shaped heat sink is used to reduce peak resonance.

■Rated output: 30W+30W (8Ω, Class A operation), 60W+60W (4Ω), 120W (BTL mode, 8Ω)

■Gain: 28.5dB

■Input terminals: ESL-A x 1, RCA x 1, XLR x 1

■Frequency response: 5Hz to 100kHz (+0dB, −3dB, 8Ω)

■S/N ratio: 102dB (IHF-A, XLR)■Total harmonic distortion: 0.007% (1kHz, 8Ω, 30W)

■Compatible impedance: 4Ω to 16Ω, 8Ω to 16Ω in BTL mode

■Power supply: 100V AC 50/60Hz, power consumption 245W (210W when no signal)

Accessories: Instruction manual, power cable, original box

Size W (width): 445 Height: 191 mm Depth: 444 mm Weight: 30.7 kg