Esoteric Grandioso D1x Dual Mono D/A Converter (Pair)


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 Reference 36 Bit Dual Mono D/A Convertor

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. This is the ultimate mission of top quality audio.

Esoteric's P1 & D1 digital source systems combine remarkable new technologies such as ES-LINK4 and 36-bit Digital to analogue processing. It's easy to see why these flagship models are called Grandioso.

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


  • Analog audio output Terminal: XLR terminal x1, RCA x1
  • Output impedance XLR 100Ω, RCA 47Ω
  • 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 x1, Input signal format Linear PCM (ES-LINK4 format): 352.8KHz / 384 kHz 48 bits, DSD (ES-LINK4 format), XLR terminal x1
  • 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, DSD
  • 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 230V AC 50Hz
  • Power consumption 20W
  • Dimensions (W × H × D) 445mm × 132mm × 448mm (including protrusions)
  • Mass 24kg