Grandioso D1

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 developed 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 (provided), 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.

Grandioso D1

Outstanding sound quality with 36-bit processing resolution

state-of-the-art 32-bit DAC device develope

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 Microdevices 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

ESOTERIC-HCLD

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 current output capability is high, and the high-performance elements adopted for the slew rate, which indicates response speed, boast the incredibly high speed of 2000V/㎲. 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 connections 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

block diagram

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 addition 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.

Wide-ranging D/D conversion functions to handle many source types

In addition to playback in the original sampling frequency, the D1 has functions for x2, x4, and x8 up-conversion of PCM digital signals. There are also various D/D conversion modes for PCM format (PCM-to-DSD conversion function, etc.).

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 digital inputs of seven types and eight channels (ES-LINK x 1, XLR x 1, i.LINK 4p/6p x 1, USB x 1, coaxial x 2, optical x1), 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 inputs of 48-bit/192kHz (ES-LINK3) and 24-bit/384kHz (Dual AES 8Fs).

USB input supporting 32-bit/384kHz PCM, 2.8/5.6MHz DSD, and asynchronous transmission

The D1 comes with USB input supporting asynchronous transmission and rates up to 32-bit/384kHz PCM and 2.8/5.6MHz DSD. Using ESOTERIC’s original PC driver software, the D1 achieves high-grade playback of even studio-master-quality source files. DoP and ASIO 2.1 are also supported.

*ASIO is a trademark of Steinberg Media Technologies GmbH.
*Mac is supported only by the standard driver DoP method.

Excellent usability

Either Hot 2 or Hot 3 can be selected for the pin assignment of the XLR audio output.

Specifications

Analog audio output
Terminals XLR x 1
RCA x 1
Output impedance XLR 100Ω
RCA 47Ω
Maximum output level
(1 kHz, full scale, 10 k Ω)
XLR 5.0Vrms
RCA 2.5Vrms
Frequency response
(when 192kHz PCM signal input)
5Hz~55kHz(-3dB)
Signal-to-noise ratio (S/N) 113dB
Total harmonic distortion 0.0007%(1kHz)
Digital audio input
ES-LINK terminal x 1
Input signal format 352.8 kHz / 384 kHz, 48bit
Linear PCM (ES-LINK4 format)
DSD (ES-LINK4 format)
XLR terminal x 1
Input level 5.0Vp-p
Input impedance 110Ω
Dual connection
Input signal format
32-384 kHz, 16-24 bit
Linear PCM (DUAL AES format)
32-192 kHz, 48 bit
Linear PCM (ES-LINK3 format)
DSD (ES-LINK1, ES-LINK2 format)
Single connection
Input signal format
32-192 kHz, 16-24 bit
Linear PCM (AES/EBU format)
DSD (ES-LINK1, ES-LINK2 format)
RCA terminal x 2
Input level 0.5Vp-p
Input impedance 75Ω
Input signal format 32-192 kHz, 16-24 bit
Linear PCM (IEC60958 format)
Optical digital terminal x 1
Input level -24.0 to -14.5 dBm peak
Input signal format 32-192 kHz, 16-24 bit
Linear PCM (IEC60958 format)
i.LINK (AUDIO) terminal x 2 (6-pin, 4-pin) S400
Input signal format 32-192 kHz, 16-24 bit, Linear PCM
DSD
USB port . B connector x 1
Input signal format 32-384 kHz, 16-32 bit, Linear PCM
2.8 MHz, 5.6 MHz, DSD
Clock output
Terminal BNC x 1
Output level equal to TTL level (into 75 Ω load)
Output frequency 44.1, 88.2, 176.4, 48, 96, 192 kHz,
22.5792, 24.576 MHz
same frequency as input (when output set to thru)
Output frequency precision ±0.5 ppm (when shipped new)
Clock input
Terminal BNC x 2(WORD IN, 10MHz IN)
Input impedance CLOCK IN 75Ω
10MHz IN 50Ω
Input frequency compatibility CLOCK IN 44.1, 88.2, 176.4, 48, 96, 192 kHz
22.5792, 24.576 MHz (±10 ppm)
10MHz IN 10 MHz (±10 ppm)
Input level CLOCK IN equal to TTL level
10MHz IN Sine wave: 0.5 to 1.0 Vrms
General
Power supply AC 230V 50Hz
AC 120V 60Hz
AC 220V 60Hz
Power consumption 14 W
External dimensions (W x H x D)
(Including protrusions)
445 mm x 132 mm x 448 mm (17 1/2" x 5 1/4" x 17 5/8")
Weight 24 kg (53 lbs)
Accessories Remote control unit (RC-1156) x 1, Batteries (AA) x 2, HDMI cable x 1, Power cord set x 1, Felt pads x 4, Owner’s manual x 1, Warranty card x 1
- This product is available in three different power supply variations shown in the specification section 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.