S-05
This sleek stem, consisting of the N-05XD and the S-05 is simple, yet versatile. All you have to do is carefully choose a pair of speakers, and you will be set for life.
£12,750
S-05
£12,750
Witness the birth of an all-new stereo power amplifier, borrowing from the engineering techniques utilized in our flagship Grandioso M1X mono block. The new S-05 – a class-A power amplifier thoroughly focused on delivering all of music’s unique tonal qualities from a more compact stereo configuration, embracing the philosophy of the Grandioso M1X: “minimal circuitry – maximum output”.
Pure
The S-05 is a Class A stereo power amplifier that is thoroughly focused on the unique tone that can only be expressed by this model. It incorporates many of the development results of the flagship model "Grandioso M1X" to refine its overflowing driving power and pure performance.
Vivid
Class A amplifiers are dense with little distortion. This general Class A characteristic alone does not begin to describe the S-05's appeal. Passionate and vivid colors, like a direct-heating tri-tube amplifier. The overwhelmingly high speed sound start-up, backed up by the abundant idling current. Powerful drive capability and open-ended dynamism.... Regardless of the amplification method, the S-05 is a new milestone in Class A amplifiers, a sincere pursuit of what an amplifier should be, and the culmination of ESOTERIC's commitment.
Fidelity
With the flagship Grandioso C1X/M1X, ESOTERIC has challenged the
limits of fidelity in pre-power transmission and opened up new horizons.
ESOTERIC's unique current transmission "ES-LINK Analog" is the ideal
method for pre-power transmission, where signal levels are extremely low
in actual use.
This Grandioso technology has been carried over to the S-05. Compared to
conventional voltage transmission, ES-LINK Analog transmits
approximately 100 times more current. Therefore, it is less susceptible
to noise, and all the energy of the music is transmitted from the
preamplifier to the power supply.
In addition, in principle, the output signal from the preamplifier and
the input signal to the power amplifier are not affected by the
impedance of the connecting cables, so the output signal from the
preamplifier and the input signal to the power amplifier can be kept
identical to each other to an extremely high degree.
The power is so overwhelming that its size is unimaginable. The
source of this power is ESOTERIC's carefully designed power supply. The
power supply is the most important component in realizing a powerful and
rich sound stage for the amplifier block, which always requires a large
current for Class A operation.
Thanks to ESOTERIC's unique power supply design, the S-05 boasts dynamic musical expression that transcends its size.
Bare mount over-sized power transformer
The S-05 uses the maximum capacity that can be installed (940VA EI core
transformer). By using a transformer with a much larger capacity than
the original product performance, the S-05 is able to follow dynamic
changes in current supply extremely well, resulting in a dynamic and
open sound. The suppression of transformer vibration also results in the
suppression of current flow. For this reason, the transformer is
bare-mounted without a case.
Multiple block capacitors in parallel
In the S-05, the rectification system also incorporates the special
attention that is unique to this model. The block capacitors are
Grandioso grade high quality custom capacitors. Dual mono and parallel
configuration of four 10,000μF capacitors per channel is used. The
rectification operation is time-delayed in parallel to stabilize charge
and release, thereby ensuring a large current supply required for Class A
operation at all times. Therefore, it can faithfully and agilely follow
the dramatic changes in the music signal and fully express its
dynamism.
Low impedance design
Critical wiring from the primary side to the power supply section, drive
stage, etc., is bolted with extra thick cables. The response of the
power supply is maximized by ensuring a low impedance.。
Tech spec
Rated output power
30W + 30W (8Ω, Class-A)
60W + 60W (4Ω)
120W (BTL mode, 8Ω)
Compatible Speaker Impedance
4Ω to 16Ω
8Ω to 16Ω (BTL mode)
Analog audio inputs
ESL-A
1 pair
XLR
1 pair
RCA
1 pair
General
Power consumption
245W (210W at no signal)
External dimensions (W×H×D)
445 × 191 × 444mm
17-½" × 7-½" × 17-½" (including protrusions)
Frequency response
5Hz to 100kHz (+0dB, –3dB, 8Ω)
S/N ratio
102dB (IHF-A, XLR)
Total harmonic distortion
0.007% (1kHz, 8Ω, 30W)
Compatible Speaker Impedance
4Ω to 16Ω
8Ω to 16Ω (BTL mode)
Gain
28.5dB
Weight
30.7kg / 67-¾ lb
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