GRANDIOSO D1 Monoblock D/A Converter

    The Overview

    To create a moving, once-in-a-lifetime connection between music and a listener,
    the vitality of the music needs to be conveyed in its purest form, without stress.
    That is the ultimate mission of top-quality audio.
    ESOTERIC’ s P1 and D1 digital source systems combine remarkable new technologies such as
    ES-LINK4 and 36-bit D/A processing.
    It’ s easy to see why these new flagship models are called Grandioso,
    Italian for “magnificent” or “majestic” .

    ESOTERIC has developed an original, state-of-the -art transmission format called ES-LINK4, which allows DSD and 352.8kHz/48bit PCM ultrawideband digital transmission using an HDMI cable. ES-LINK4 performs a large part of the digital signal processing on the sending side, greatly reducing the digital signal processing load on the D/A converter. In addition to ultra-wide bandwidth, we sought high sound quality through our “Pure D/A” concept, in which the D/A converter specializes in its original function of D/A conversion processing.
    The D1 applies a 36-bit D/A processing algorithm that converts PCM signals to analog signals at a high resolution of 36 bits by combining several 32-bit DAC devices. The tone of the high-bit data is used for faithful analog conversion. The resolution of 32-bit encoding is 256 times higher than that of 24-bit encoding, and 36-bit encoding gives an amazing resolution level that is another 16 times higher – a total of 4,096 times higher than the resolution of 24-bit encoding. Producing even finer bit tones minimizes operational error for outstanding expression of even subtle music signals.
    The clock circuit, which supplies highly accurate reference clock signals to a digital circuit, can be considered the core unit of a digital player. The clock circuit of the P1 and D1 is completely independent of other circuits, including its power source and ground, enabling pure clock signals to be supplied to the system. The voltage controlled crystal oscillator (VCXO) was developed especially for the P1 and D1 in a joint effort with Nihon Dempa Kogyo (NDK), a major manufacturer of crystal oscillators. For a high-precision custom clock device worthy of leading models, high sound quality playback is provided thanks to an extremely low level of phase noise and a crystal element that is even larger than before.

The Features

A monaural configuration for the ultimate evolutionary step toward the ideal stereo

 The D1 follows the monaural configuration of the D-01, which we introduced in 2004 as the world’s first monaural D/A converter. The D-01 was deve-loped with the goal of attaining the highest level of channel separation and the ideal power supply to each channel. In the new D1, we have introduced the latest technology and further enhanced the design. The right and left channels can now be link-connected with a single HDMI cable (provid-ed), and easy input from external source devices is possible. With the D1, you can enjoy a world of incredible stereo with the rich stereo image and sonic depth that is only possible with a monaural configuration.

Outstanding sound quality with 36-bit processing resolution

 Aiming for the pinnacle of sound quality, we have incorporated the AK4495S, a state-of-the-art 32-bit DAC device developed by Asahi Kasei Microd-evices Corporation. Sixteen circuits per channel are provided to achieve phenomenal linearity and low noise. In addition to direct processing of the DSD signal, a new 36-bit D/A processing algorithm has been adopted for analog conversion of the PCM signal at 36-bit resolution. The result is fine, smooth sound quality as along with high resolution.

ESOTERIC-HCLD*: ESOTERIC’s own output buffer circuit featuring fortified current transmission

 A high-speed current transmission capability is the most important factor of an analog output circuit for transmitting a wide dynamic range of music signals downstream without deficiencies. For the ultimate performance as a line driver, the output buffer amplifier circuit of the D1 makes extensive use of materials and is configured with its own board separate from the D/A converter. The curr-ent output capability is high, and the high-perfor-mance elements adopted for the slew rate, which indicates response speed, boast the incredibly high speed of 2000V/μs. The ability to supply instant current is maximized with an extravagant buffer circuit configuration utilizing one circuit for RCA output and one circuit each for hot and cold conn-ections for XLR output. With the ESOTERIC-HCLD, the D1 reproduces the dynamism of music with breathtaking reality.
*HCLD=High Current Line Driver

High sound quality through the separation of digital and analog circuits

 All analog circuits (DAC circuit analog portion, HCLD buffer circuit, etc.) are electrically separate from the digital circuits. This further enhances the clarity of sound quality by preventing the intrusion of digital noise.

Large toroidal transformers boasting high speed and surplus power supply capacity

 Two large toroidal power supply units are installed for the digital and analog circuits, enabling high-efficiency and high-power drive operation in add-ition to low noise and low distortion. Stable and clean power is supplied to each circuit block by strong power supply circuits incorporating multiple large capacitors.

Seven types and eight channels of digital input that support high sampling rates

 To enable connection to an extensive range of devices, the D1 is equipped with wide-ranging dig-ital inputs of seven types and eight channels (ES-LINK x 1, XLR x 1, iLINK 4p/6p x 1, USB x 1, coaxial x 2, optical x 1), and can be used for high-sampling -rate sources of up to 24-bit/192kHz. In addition, XLR x 2 supports high-sampling-rate/high-bit inp-uts of 48-bit/192kHz (ES-LINK3) and 24-bit/384 kHz (Dual AES 8Fs).

The Specs

Analog audio output
Terminal XLR terminal 1 system
RCA 1 system
Output impedance XLR 100Ω
Maximum output level
(1kHz, full-scale signal input, 10kΩ load)
XLR 5.0Vrms
RCA 2.5Vrms
Frequency response
(192kHz PCM signal input)
5Hz ~ 55kHz (-3dB)
S / N ratio 113dB
Distortion 0.0007% (1kHz)
Digital audio input
ES-LINK terminal 1 system
Input signal format Linear PCM (ES-LINK4 format)
352.8KHz / 384 kHz 48 bits
DSD (ES-LINK4 format)
XLR terminal 1 system
Input level 5.0Vp-p
Input impedance 110Ω
Input signal format
DUAL connection
32 ~ 384kHz, 16bit ~ 24bit
linear PCM (DUAL AES format)
32 ~ 192 kHz 48 bits (ES-LINK3 format)
DSD (ES-LINK1, ES-LINK2 format)
Input signal format
SINGLE connection
32 ~ 192kHz, 16bit ~ 24bit
linear PCM (AES / EBU format)
DSD (ES-LINK1, ES-LINK2 format)
RCA jacks Two lines
Input level 0.5Vp-p
Input impedance 75Ω
Input signal format 32 ~ 192kHz, 16bit ~ 24bit
linear PCM (IEC60958 format)
Optical digital terminal 1 system
Input level -24.0 ~ -14.5dBm Peak
Input signal format 32 ~ 192kHz, 16bit ~ 24bit
linear PCM (IEC60958 format)
i.LINK (AUDIO) terminal (6-pin, 4-pin) S400 2 system
Input signal format 32 ~ 192kHz, 16bit ~ 24bit
linear PCM
USB terminal 1 system (B terminal)
Input signal format Linear PCM 32 ~ 384 kHz, 16-bit 32-bit ~
DSD 2.8MHz, 5.6 MHz
Clock output
Terminal BNC connector × 1
Output level TTL level equivalent (75Ω load)
Output frequency The same frequency as 44.1,88.2,176.4,48,96,192kHz, 22.5792,24.576MHz, and the input
(through output setting)
Output frequency accuracy ± 0.5ppm (factory)
Clock input
Terminal BNC terminal × 2 (WORD IN, 10MHz IN)
Input impedance CLOCK IN 75Ω
10MHz IN 50Ω
Input frequency CLOCK IN 44.1,88.2,176.4,48,96,192KHz
22.5792,24.576MHz (± 10 ppm)
10MHz IN 10MHz (± 10ppm)
Input level CLOCK IN TTL level equivalent
10MHz IN 0.5 ~ 1.0Vrms sine wave
Power 100V AC 50-60Hz
Power consumption 20W
Dimensions (W × H × D) 445mm × 132mm × 448mm (including protrusions)
Mass 24kg
Accessories Power cord × 1
HDMI cable × 1
× 4 sheets felt
Instruction Manual × 1
patronize's card × 1
You may be changed without notice for improvement and appearance specifications.