Esoteric D-07X User manual

Stereo D/A Converter D- 07X
Newest evolution of our 32 bit dual/mono D/A converter, “D-07X,” utilizing cutting edge technology
while embodying the philosophy of the ESOTERIC D-02 and K series:
“Reproduce the inspiration of the original musical recording, free from stress and coloration”
This state-of-the-art D/A converter provides uncompromising quality with PC audio playback using a USB connection, S/PDIF Coaxial, AES/EBU or TosLink
Optical as well as when connected to an ESOTERIC Super Audio CD/CD transport. Audio performance has been improved using a dual/mono configuration
in which multiple 32 bit D/A conversion circuits are combined in parallel, as well as by utilizing a parallel buffer amplifier for unbalanced analog outputs.
This model uses cutting edge technology, including 192kHz/24bit USB input compatible with asynchronous transfer, high accuracy clock circuit, multiple
D/D conversion options.

Stereo D/A Converter D-07X
PRINTED IN JAPAN 0212O05•TECD-0146
Dual mono D/A converters based on the concept of
ESOTERIC K series digital source device
The D/A converter IC’ s of the D-07X incorporate 32-bit “AK4392”
chipsets, manufactured by ASAHI KASEI Microdevices Corporation.
Two circuits per channel in parallel/differential output configurations
are provided to achieve phenomenal linearity and low noise. The
converters and analog output circuits, which make up a fully dual
mono configuration, are located on the left and right hand sides of
the board, completely separated from the digital signal processing
circuit. This layout allows an excellent channel separation and
high-quality playback with rich localization and sonic depth.
High quality buffer circuits
For the final stage of analog audio output (buffer amplifier), New
JRC’ s high end audio operational amplifier MUSES is used. These
buffer circuits are laid out symmetrically for each of the hot/cold
signal lines to construct a fully balanced configuration. When the
RCA audio output is selected, the buffer amplifier is switched to
parallel configuration. These enhancements provide the best sound
quality for each of the balanced and unbalanced audio signal outputs.
Substantial power supply
A high quality power supply is essential to high end audio
equipments.
The power supply circuit of the D-07X is substantially built with
extra large, low loss, low magnetic flux leakage R-core transformer,
multiple large capacitors and high speed Schottky diode. This circuit
supplies low-impedance, clean, stable power to all circuits very
quickly to achieve ultimate level of detail expression.
High sampling rate digital inputs
The D-07X features multiple digital inputs (USB, XLR, optical ×1,
coax ×2), and all these inputs support high-sampling-rate sources up
to 24 bit / 192kHz.
The D-07X supports ES-LINK (XLR) connection with ESOTERIC SACD
transport for SACD playback.
USB input supports asynchronous transmission
up to 24 bit / 192kHz
The USB input supports asynchronous transmission up to 24 bit /
192kHz using ESOTERIC’ s original driver software for PC or MAC.
Additionally, a USB isolator allows high quality reproduction of
studio master sources by blocking the noise from computer.
Multiple D/D functions to suit multiple sources
In addition to playback at the original sample rate and word length,
extensive D/D conversion modes for PCM formats include PCM up
conversion to x 2 or x 4 from the original sampling frequency, using
the “RDOT” algorithm, as well as PCM > DSD conversion to convert
the PCM audio signal to DSD format similar to Super Audio CD. Super
Audio CD is directly converted into analog signals and played back.
Digital filter “Off” mode and four types of digital filters
The D-07X features Digital Filter Off mode recommended by
ESOTERIC, which is characterized by a smooth and subtle sound
quality. The model also features four types of digital filters for PCM
signal processing. In addition to two types of FIR (Finite Impulse
Response) digital filters, two types of Short Delay digital filters
(Referred to as “apodizing” filters) are installed. These filters
eliminate the pre-echo in the impulse waveform to reproduce audio
signal as a more natural and precise sound.
VCXO high-precision clock
A high-precision VCXO (voltage controlled crystal oscillator) is used
for the internal clock circuit. A dedicated stabilized power supply
circuit improves the stability of the clock.
The high precision clock signal generated by the VCXO substantially
reduces jitter, and helps to create a broader soundstage and more
focused imaging.
Sync playback with external device is enabled by variety
of clock sync functions.
The clock sync function, one of the core ESOTERIC technologies,
synchronizes playback of the source device and the D/A converter
greatly reducing jitter. In addition to the clock output mode, which
outputs the high accuracy clock generated by the internal VCXO to
the transport, a clock input mode is included, which allows
synchronization with external master clock generators (ESOTERIC G
series). It supports 44.1 and 48kHz based word clock frequencies as
well as 22.5792MHz master clock output/input for connecting
ESOTERIC “Direct Master Clock Link” supporting transport. The
D-07X also supports a 10MHz clock input from GPS based clocks.
Also, sync playback with the external clock is enabled when the PC
is connected to an asynchronous USB.
High-grade re-clocking function
Two types of PLL circuits (PL L1/PLL2), having different
characteristics, are included for connection with a transport that
does not have a clock sync function. Broadband jitter can be
effectively reduced by the high accuracy re-clocking that uses the
internal VCXO.
Excellent usability
• 32 bit accuracy digital attenuator function
• Output level switch of XLR audio output (0dB/+6dB)
• XLR pin assignment change (Hot 2/Hot 3)
Headphone jack
Volume control is independent
from the line output level.
ESOTERIC COMPANY
1-47 Ochiai, Tama-shi, Tokyo 206-8530, Japan
Fax: [phone]
www.esoteric.jp
www.teac.com/esoteric/
Please note that Esoteric products are available at limited distributors in respective countries.
" ESOTERIC " is a trademark of TEAC Corporation, registered in the U.S. and other countries.
©2012 TEAC Corporation. All Rights Reserved. All text, images, graphics and other materials on this catalogue are subject to the copyright and other intellectual
property rights of TEAC Corporation. These materials shall not directly or indirectly be published, reproduced, modified or distributed in any medium.
Design and specifications are subject to change without notice." Super Audio CD " and “DSD” are registered trademarks.
Other company names and product names in this document are the trademarks or registered trademarks of their respective owners.
Specifications
Audio output (Analog Audio) XLR (2 channel) x1, RCA (2 channel) x 1, Headphones x 1 Output impedance XLR : 100 ΩRCA : 25 ΩMaximum output level (1 kHz, with full-scale input) XLR : 2.45 Vrms (when set to 0 dB with 10 kΩload), RCA :
2.45 Vrms (with 10 kΩload),PHONES : 20 mW + 20 mW (with 32 kΩload) Frequency response 5 Hz to 55 kHz Signal-to-noise ratio (S/N) 115dB Total harmonic distortion 0.0015%(JEITA) Digital audio input XLR x1 RCA x2 OPTICAL x1 USB
port (B connector) x1 Input sampling frequencies 32, 44.1, 48, 88.2, 96, 176.4, 192 (kHz) Note: The XLR input (only) supports DSD input in ES-LINK (single) format. Clock sync output BNC x1 Output frequencies 44.1, 88.2, 176.4, 48, 96, 192, 100
(kHz / rectangular wave) / 22.5792, 24.576 (MHz) / Same frequency as input (when set to thru) Output level Equivalent to TTL levels (with 75 Ωload) Clock sync input BNC x1 Input frequencies 44.1, 88.2, 176.4, 48, 96, 192, 100 (kHz) / 10, 22.5792,
24.576 (MHz) Input impedance 75 ΩInput level Square wave: equivalent to TTL level. / Sine wave: 0.5–1.0 Vrms (with 75 Ω load) General Power supply AC 230 V, 50 Hz / AC 120 V, 60 Hz / AC 220 V, 60 Hz Power consumption 7 W External
dimensions (W x H x D, including protrusions) 445 x106.5 x356 mm (17 1/2" x4 2/8"x 14 1/8") Weight 10.4 kg (22.93 lb) Accessories Power cord x1, Owner’s manual x1, Warranty card x1