"I was completely shocked and actually spilled out the word wow without realising it."
Dan, HIFIpig (about d1-tube)
"sensational natural sounding DAC.", Stefan Schickedanz, AUDIO (about d1-tube)
"Exceptional unit, both technically and musically. Amazing what you can still get out of the good old CD. A true experience, providing the rest of the system is on the same level." Jürgen Saile, HIFIstatement (about d1-tube)
"These d1-server + d1-dual or d1-tube set-ups attained a level for PCM and DSD which I’d not heard before.
After this review, the prize "Grand Frisson 2014" of Audiophile Magazine is obvious." Thierry Nkaoua, Audiophile-Magazine and 6moons (about d1-tube)
-192KHz asynchronous Xmos USB, optical, RCA and AES-EBU digital inputs, selectable from a remote control.
-44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz and 192KHz, 16 to 24 bit formats supported on all inputs except 96KHz max for optical input.
-as an option, DSD (DoP standard) supported on the USB, AES-EBU and spdif inputs.
-USB input compatible with Jplay in 24 bit "extreme hibernate" mode. The USB input is the same as the d1-dual USB input.
-embedded custom clock with anti-jitter FIFO memory.
-1.4Vrms max RCA output. The XLR connector carries only the un-balanced signal, so it is equivalent to the RCA output.
-volume control, adjusted by a remote control and an OLED display, works for all inputs, not only USB.
-phase polarity selected by remote control.
-non-oversampling DAC compensation filter activated or disactivated by remote control.
-display switched off by remote control or automatic.
-all unused inputs are completely disconnected (including the ground) to keep the optimum noise floor even when several sources are connected.
-R2R doubled DAC technology using 0.01% VAR Bulk Metal® Foil resistors from Vishay Foil Resistors, 200 resistors per stereo channel.
-tube output stage using one ECC82/12AU7 double triode per channel. 420ohm output impedance.
-external power supply to minimize the noise on the embedded preamp.
-aluminium and PMMA enclosure with massive pure copper antivibration plate.
-power consumption 22W.
-DAC dimensions: height 110mm, width 360mm, depth 290mm.
-power supply dimensions: height 65mm, width 122mm, depth 180mm.
-DSD (DoP) option.
-silver massive aluminium front panel.
-115V power option.
-BNC coaxial digital input instead of RCA.
-d2-tube-mk2 and d3-tube, 69 bit 2 way or 3 way active crossover with RCA analog outputs including a digital preamp for the main volume control and also for the relative level between bass and treble. The crossover slope can be 6dB/oct, 12dB/oct or 18dB/oct. All parameters, crossover frequency, filter slope, relative volume, main volume, relative digital delay... can be controlled from the remote while listening to music. Only the last channel (high frequencies) uses a tube, the other channels use a transistor output stage.
For the d2-tube-mk2 with DSD option the digital delays can't be used.
The d3-tube is not compatible with the DSD option (you can use a reclocker or d1-server as a DSD to PCM converter).
-USB cable with high performance filter for a noticable sound quality improvement.
The list of embedded options is on the serial number sticker on the rear panel of the DAC.
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mobile telephone: +33 6 18 03 14 08 (european time zone)