[d1-digital reclocker]

d1-digital reclocker

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d1-digital reclocker The d1-digital is a new concept of reclocker. It aims at improving the sound of any transport. It transforms also any 176KHz/24 DAC into a DSD ready DAC.

 The d1-digital is a new concept of reclocker. It aims at improving the sound of any transport. It transforms also any 176KHz/24 DAC into a DSD ready DAC.

"With the reclocker, music sounded more refined, more nuanced, and simply more natural.
I also noticed that instruments had a greater sense of tonal richness and density. It also offers real and easy to hear improvements."
Michael Lavorgna, AUDIOSTREAM (Stereophile)
"The d1-server and its reclocker are absolute key points to get something quite magic at the end." Thierry Nkaoua, Audiophile-Magazine
"I must say, this is great !. It is more detailed and everything is natural.
The room's acoustics are much more here, you just get more the feeling of sitting in a concert hall. This thing is a hit!"
J�rgen Saile, HIFIstatement

It is connected to the output of the drive (Chromecast Audio, Sonos, CD player, computer with USB, music server).

The d1-digital uses the same technologies as the d1-dual DAC, especially the asynchronous fifo memory but the analog outputs have been replaced by digital outputs.
So it has multiple digital inputs, a 69bit volume control which can be used or not used and more interesting, it also has an internal clock which strongly attenuates the jitter of any digital source.
So the d1-digital reclocker can be associated to all available drives.
It can also be used as a USB to AES-EBU (or spdif) converter with very high sound quality.
DSD files (DoP standard) are accepted on the USB, spdif and AES-EBU inputs and then resent in DSD DoP format or transformed to pcm 176/24 to the spdif and AES-EBU outputs.

Totaldac d1-digital front

It can de-jitter any digital source to get an unexpected better drive from a computer, a music server or a CD transport.
A USB cable length is limited by the USB official specification, so the distance between a computer and a USB DAC is limited. When a d1-digital reclocker is inserted between the computer and the DAC the AES-EBU cable length is almost non limited, so the computer can be placed far from the DAC.

Totaldac d1-digital schema

-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.
-DSD (DoP standard) supported on the USB, AES-EBU and spdif inputs.
-an custom DSD to 176.4KHz/24 pcm can be activated or disactivated from the remote control.
-USB input compatible with Jplay in 24 bit "extreme hibernate" mode.
-embedded custom clock with anti-jitter FIFO memory.
-AES-EBU and spdif (RCA or BNC) digital outputs, only one of these outputs must be used at the same time.
-69bit digital volume control, adjusted by a remote control and an OLED display. The remote control receiver can be disabled by a switch to dedicate the remote control.
-bit perfect signal path when the volume is set to maximum (0dB).
-phase polarity selected by remote control.
-display switched off by remote control or automatic.
-external power supply to minimize the noise.
-aluminium and PMMA enclosure.
-power consumption 12W.
-dimensions: height 110mm, width 360mm, depth 290mm.
-power supply dimensions: height 65mm, width 122mm, depth 180mm.
-weight: 4kg

Available options:
-silver massive aluminium front panel.
-115V power option.
-BNC coaxial digital input and output instead of RCA.
-USB cable with high performance filter for a noticable sound quality improvement, length on demand, 1m by default.
The list of embedded options is on the serial number sticker on the rear panel of the DAC.


Totaldac d1-digital rear

Inside view:


Silver option:

Totaldac d1-digital silver


This is a measurement which proves how far the d1-digital attenuates the jitter.
To show how far the jitter can be attenuated a high jitter spdif generator has been built, based on a mains pollution applied to a transport oscillator. So pollution is 50Hz, 100Hz and other harmonics.
So a high jitter spdif generator is used, then sent to a AD1955 DAC chip evaluation board which is used as a reference DAC because it has no embedded fifo based jitter attenuator. Then the DAC analog output is sent to an oscilloscope or to the Totaldac noise analyser via an attenuator.

10KHz sinewave with a high jitter, without using the reclocker d1-digital:

10KHz sinewave without d1-digital reclocker

See the very high jitter, the sinewav is like "thick" on the right.

10KHz sinewave with a high jitter, when using the reclocker d1-digital:

10KHz sinewave with d1-digital reclocker

Now the jitter is not visible on the oscilloscope but it is hard to say how much jitter is attenuated.
Now let's make the same experiment with a Totaldac noise analyser.

Noise floor of the AD1955 DAC:

AD1955 noise floor

The noise floor is not very clean due to AD1955 DAC chip and the basic power supplies used, let's remember this noise floor for the next measurements.

10KHz sinewave spectrum without d1-digital reclocker:

10KHz sinewave spectrum without d1-digital reclocker

A lot of spurious noise is visible around the 10KHz sinewave, this is the high jitter.

10KHz sinewave spectrum when using the d1-digital reclocker:

10KHz sinewave spectrum when using the d1-digital reclocker

A d1-digital reclocker is plugged between the transport and the AD1955 DAC.
Now the 10KHz sinewave is clean. The is no jitter-type spurious noise around the 10KHz sinewave (ignore the ad1955 noise floor already measured). The jitter is vastly attenuated. The spurious around the 10KHz sinwave is attenuated by at least 70dB.
This shows how far the d1-digital reclocker can attenuate jitter, and you can hear the improvement easily with any application.
This is not the reclocker jitter measurement, this only illustrates the capacity of the reclocker to highly reduce the jitter.

배송은 주문 당일 배송을 원칙으로 하며 받으실 때까지 약 2-3일 정도 소요됩니다. (도서 산간지역 3-4일 소요)
•제품 수급에 의해 지연이 되는 경우 별도의 연락을 드린 후 배송을 하여 드립니다.
_ 전 제품 5만원 초과 상품은 배송비가 무료입니다.
(중고/전시품란의 일부상품 제외. 5만원 이하 상품은 3,000원의 배송비가 추가됩니다. )
_ 전제품 품질보증서가 들어있는 정식 수입원 제품입니다.
(일부 상품은 정식 수입품이지만 시리얼넘버로 정품관리를 하기 때문에 보증서가 들어있지 않을 수도 있습니다.)
-「전자상거래법 제17조 제1항」 에 의거하여 소비자의 단순변심으로도 7일 이내 청약철회가 가능합니다.
_제품을 설치하였거나 개봉후에는 반품 및 교환이 불가능합니다.
_제품 자체에 결함이 있을 경우 100% 교환 및 환불이 가능합니다.
_특별할인판매 및 기타 이벤트 판매의 경우 현금 주문은 24시간 이내에 입금되지 않으면 주문은 자동취소됩니다.
제품 개봉 및 설치를 하셨을 경우에는 공정거래위원회 표준약관 제15조 2항에 의거하여 교환 및 반품/환불이 불가능합니다.

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