Zweimann DAC I2S DSD USB User manual

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DAC I2S DSD
ZWEIMANN
USB

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“DSD” is a registered trademark. “Direct Stream Digital”, DSD and their logos are trademarks of
Sony Corporation.
ASIO is a trademark and software of Steinberg edia Technologies GmbH.
icrosoft, Windows and Windows7,10 are either registered trade-marks or trademarks of icrosoft
Corporation in the United States and/or other countries.
Apple, acintosh, ac and ac OS are trademarks of Apple Inc., registered in the U.S. and other
countries. Other company names and product names in this document are the trademarks or
registered trademarks of their respective owners.
Other company names, product names and logos in this document are the trademarks or registered
trademarks of their respective owners.
SAFETY INSTRUCTIONS
There are t o categories of Safety Instructions included in this manual:
• Product Warnings, (i.e., hat must never be done to assure avoiding those hazards that could
cause bodily injury or property damage); and
• User Directions (i.e., hat must al ays be done to assure the safe use of your device).
The Safety Instructions contained in this manual have been categorized in accordance ith the
seriousness of the potential hazards through the use of Signal Words. Those Signal Words, and their
intended meanings, are as follo s:
DANGER: Indicates that a failure to observe the Safety Instructions could result in death or
catastrophic bodily injury.
WARNING: Indicates that a failure to observe the Safety Instructions could result in serious bodily
injury.
CAUTION: Indicates that a failure to observe the Safety Instructions could result in minor bodily
injury or property damage.

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NOTE: Designates important information that relates to activities and/or conditions that might
result in loss of data and/or damage to your device.
Safe Use and Operati n f Y ur Device
This equipment emits stray RF energy and ill interfere ith the reception of signals by airborne
electronic navigational devices or medical devices. Do not operate this equipment near any
sensitive medical devices.
WARNING: Use nly gr unded AC p wer c rds.
Al ays immediately disconnect the po er to the equipment in the event the device emits an unusual odor
or sound or generates smoke.
WARNING: Never attempt to disassemble, repair or make any modification to your device.
Disassembly, modification or any attempt at repair could cause bodily injury or property damage, as
ell as damage to the device itself.
WARNING: Your device is not a toy. Never allo children to play ith your device. Misuse, rough or
improper handling of your device by children could result in serious bodily injury for any of the
enumerated safety arnings in this manual. In addition, al ays keep all accessories and
components out of the reach of small children as small parts might present a choking hazard. Seek
immediate medical attention if choking occurs or if any small part has been s allo ed.
CAUTION: Never raise the sound volume level too high hen using your device ith earphones. An
excessive sound volume level could cause damage to your hearing.
WARNING: To reduce the risk of fire or electric shock, do not expose the unit to moisture or ater.
Do not allo foreign objects to get into the enclosure. If the unit is exposed to moisture, or a
foreign object gets into the enclosure, immediately disconnect the po er cord from the all. Take
the unit to a qualified service person for inspection and necessary repairs.
Read all the instructions before connecting or operating the component.
Keep this manual so you can refer to these safety instructions.
Heed all arnings and safety information in these instructions and on the product itself. Follo all
operating instructions.
Do not use this unit near ater.
You must allo a minimum 10 cm or 4 inches of unobstructed clearance around the unit. Do not
place the unit on a bed, sofa, rug, or similar surface that could block the ventilation openings. If the
unit is placed in a bookcase or cabinet, there must be ventilation of the cabinet to allo proper
cooling. Keep the component a ay from radiators, heat registers, stoves, or any other appliance
that produces heat.
The unit must be connected to a po er supply only of the type and voltage specified on the rear
panel. Connect the component to the po er outlet only ith the supplied po er supply cable or an
exact equivalent.

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Do not route the po er cord here it ill be crushed, pinched, bent, exposed to heat, or damaged
in any ay. Pay particular attention to the po er cord at the plug and here the cord exits the back
of the unit.
The po er cord should be unplugged from the all outlet during a lightning storm or if the unit is to
be left unused for a long period of time.
Immediately stop using the component and have it inspected and/or serviced by a qualified service
agency if:
• The po er supply cord or plug has been damaged.
• Objects have fallen or liquid has been spilled into the unit.
• The unit has been exposed to rain.
• The unit sho s signs of improper operation.
• The unit has been dropped or damaged in any ay.
FCC N tice - Declarati n f C nf rmity Inf rmati n
This equipment has been tested and found to comply ith the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment uses and can radiate radio
frequency energy and, if not installed and used in accordance ith the instructions, may cause
harmful interference to radio communications.
Ho ever, there is no guarantee that interference ill not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, hich can be
determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the follo ing measures:
• Reorient or relocate the receiving antenna.
• Increase the separation bet een the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to hich the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
WARNING: Only peripherals complying ith the FCC class B limits may be attached to this
equipment.
Changes or modifications made to this equipment, not expressly approved by us or parties
authorized by us could void the user’s authority to operate the equipment. This device complies
ith part 15 of the FCC Rules. Operation is subject to the follo ing t o conditions: (1) This device
may not cause harmful interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.

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Notice for customers: The following information is only applicable to equipment sold in countries
applying EU Directives.
EU Declarati n f C nf rmity
Hereby, ZWEIMANN, declares that this device is in compliance ith the essential
requirements and other relevant provisions of Directive 2004/108/EC.
Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other
European countries ith separate collection systems)
This symbol on the product or on its packaging indicates that this product shall not be treated as
household aste. Instead it shall be handed over to the applicable collection point for the recycling
of electrical and electronic equipment. By ensuring this product is disposed of correctly, you ill
help prevent potential negative consequences for the environment and human health, hich could
other ise be caused by inappropriate aste handling of this product. The recycling of materials ill
help to conserve natural resources. For more detailed information about recycling of this product,
please contact your local Civic Office, your household aste disposal service or the shop here you
purchased the product.

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DA ZWEIMANN USB commitment to Hi-Res audio playback and supports
gapless playback and the ability to play DSD, Quad DSD and PC along
with other Hi-Res formats. The DA ZWEIMANN USB has what it takes to
help you enjoy your music, and to discover how truly amazing music can
sound on a DAC engineered for hi-res analog and digital audio.
As befits a device that will be the heart of a digital audio system, the DA
ZWEIMANN USB employs VERITA AK4490 DACs, designed by Asahi Kasei
icrodevices Corporation for use in high-end audio equipment.* The
VELVET SOUND architecture of the AK4490 is capable of producing a finely-
detailed and expressive sound at frequencies audibility, necessary for Hi-
Res Audio playback. And newly developed Low Distortion Technology
achieves 112dB of S/(N+D) which is the highest level in the industry for a
120dB-class DAC.
As well as 11.2 Hz DSD Native playback, the DA ZWEIMANN USB also
supports wide variety of Hi-Res Audio sources, including 384kHz/32-bit
PC , and delivers on Hi-Res Audio's promise of smooth, ultra-detailed
sound and an outstanding soundstage.
In the pre-amp section, the DA ZWEIMANN USB employs a fully-
balanced
circuit design from the out
put of the D/A Converters and Volume Amplifier
section. Control signals from the volume knob precisely control four
independent variable-gain amplifiers simultaneously — both positive and
negative for the left and right channels. With this circuit design, audio
signal paths are simplified and independent left and right channels and
phase is preserved for clear sound quality with outstanding channel

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separation.
DA ZWEIMANN USB has a Bluetooth 3.0 class 2 surface mount audio
module with PCB trace antenna on board.
The module provides a fully integrated solution for delivering high quality
stereo audio in a small form factor.
It combines a Class 2 Bluetooth radio with an embedded DSP processor,
controlled and configured by simple ASCII commands and GPIO.
It integrates RF, a baseband controller, and DSP, making it a complete
Bluetooth audio wireless link. Bluetooth 3.0 class 2 supports HSP/HFP,
A2DP, AVRCP, SPP, and iAP profiles and includes support for codecs such
as SBC, aptX, and AAC. It provides a UART interface, GPIO, stereo speaker
outputs, stereo microphone inputs, and a USB port.

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*The AK4490 is a product in the Audio4pro™ family brand, developed by Asahi Kasei icrodevices
Corporation specifically for professional audio equipment and high-end digital audio applications.
Fr m Hi-Res t Extreme Res luti n
High-volume storage has become cheap enough for the proliferation of hi-res music beyond CD
quality (16-bit/44.1kHz). Storing 24-bit/96 kHz or 192 kHz music ith PCM encoding in
uncompressed format (typically WAV) or lossless compression format (such as FLAC, M4A, WMA)
has become standard practice for audio enthusiasts.
Music is typically recorded in 24 or 32-bit PCM or DSD format at the recording studio. It is then
converted to lo er resolution format for mass-market distribution.
Pulse-code modulation (PCM) is a method used to digitally represent sampled analog signals. It is
the standard form of digital audio in computers, compact discs, digital telephony and other digital
audio applications. In a PCM stream, the amplitude of the analog signal is sampled regularly at
uniform intervals and each sample is quantized to the nearest value ithin a range of digital steps.
A PCM stream has t o basic properties that determine the stream's fidelity to the original analog
signal: the sampling rate, hich is the number of times per second that samples are taken, and the
bit depth, hich determines the number of possible digital values that can be used to represent
each sample.
DXD is simply PCM 24-bit/352.8 kHz.
Direct-Stream Digital (DSD) is the trademark name used by Sony and Philips for their system of
digitally recreating audible signals for the Super Audio CD (SACD). DSD uses pulse-density
modulation encoding – a technology to store audio signals on digital storage media that are used
for the SACD.
The data is stored as Delta-Sigma modulated digital audio, a sequence of single-bit values at a
sampling rate of 2.8224 MHz (64 times the CD audio sampling rate of 44.1 kHz, but only at 1⁄16 bit
resolution).

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Comparing PCM and DSD
Identical data in DSD64 (2.8 MHz sampling rate) format takes up approximately 20% more storage
space than 24-bit/96kHz format. The ZWEIMANN DAC I2S DSD is designed to faithfully reproduce
music irrespective of format.

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Dual M n Delta Sigma DAC I2S DSD ZWEIMANN
Features at-a-glance
•State-of-the-art DAC Delta Sigma DAC supporting USB PCM 384 and native DSD256
•Dual Mono AKM 4490EQ, 120dB 768kHz/32-bit 2ch Premium DAC
•Bluetooth 3.0 class 2 from Microchip supports HSP/HFP, A2DP, AVRCP, SPP, and iAP profiles and
includes support for codecs such as SBC, aptX, and AAC
•USB PCM / DSD Digital Sound card base on Amanero ith our unique VID PID and ZWEIMANN
drivers
•Firm are upgrade via Bluetooth hen available
•Full microprocessor Cortex control ith memory retention
•Invert display function by left Encoder from the Menu
•Five filters to choose from by right Encoder from the Menu
•Five digital inputs for complete system flexibility
•Supports DSD native playback by ASIO2.1 and DoP method
•Ultra-lo -noise in the input stage for the lo est possible noise floor
•Thee methods to choose Input;
-AutoDetect Inputs- DAC s itch automatically to the active Input. This function can be s itched off.
-Choose by left or right Encoder
-By adding external s itches to GND on PCB
•Self-test during po er ON.
•Volume adjustment in 32 precise 1dB increments for headphones
•Advanced relay ladder net ork for controlling volume, ith a single resistor in the signal path at
any volume setting
•Texas Instruments Voltage Regulators in Po er Section:
-Ultra-Lo Noise, High PSRR LDO for RF/Analog Circuits, LP38798
-Micropo er 150-mA Lo -Noise Ultra-Lo -Dropout Regulator, LP2985
-Ultra-Lo Noise, High PSRR, Lo -Dropout Linear Regulator, TPS7A30
•USB card po ered thru internal PSU (not by PC)
•Toroidal line po er supply for analogue and digital part
•Driver soft are for Windo s (USB input) DAC ZWEIMANN USB Technologies
•Asynchronous transfer mode
•Very lo po er consumption on Standby Mode

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Inputs:
1 x USB PCM / DSD Digital (PCM up to 384kHz & DSD up to DSD256 and 6.144MHz, 12.288 MHz)
1 x Coaxial Digital S/PDIF
1 x Optical Digital Toslink
1 x AES/EBU Digital
1 x Bluetooth module for audio streaming
Outputs:
1 x pair of stereo RCA
1 x pair of Balanced XLR
1 headphone output
Features DAC AKM 4490EQ:
1. 256x Over Sampling Stereo D/A Converter
2. 32-bit 8x Digital Filter
3. Sampling Rate: 30kHz~768kHz
4. Lo Distortion Full Differential Output
5. SCF
6. De-emphasis Filter
7. Soft Mute
8. DSD Input (2.8MHz, 5.6MHz, 11.2MHz)
9. External Digital Filter Mode
10. THD+N: -112dB
11. DR, S/N: 123dB
Focusing on the aveform in the time domain, the built-in 32-bit 8x digital filter controls the
transient response of the signal. The 5 types of digital filters allo the music playback in a variety of
sound quality settings by s itching the filter type.

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Specificati ns:
• USB Sampling Rates: 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz, 352.8KHz, 384KHz and
DSD 2.8MHz, 5.6MHz, 11.2MHz, 6.144MHz, 12.288 MHz
• S/PDIF Sampling Rates: 44.1KHz, 48KHz, 88.2KHz, 96, 176.4KHz, 192KHz, 352.8KHZ, 384KHz
• Maximum Sampling Rate: 32-bits
• Bit Resolution: 16-24-bits
• Po er output Headphone:
• THD+N: 0.005%
• SNR = 123dB
• Frequency Response: 10Hz to 50kHz

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• Dimensions: in mm W 443 mm, D 320 mm, H (including feet) 100 mm
• Weight: 10 Kg
• World ide AC voltage: (90VAC~130VAC // 210VAC~ 250VAC) Area depended
• AC Fuse: Slo -blo , 1A, 250VA
Quick Start Guide
Setup and Input Select r:
Left kn b: Briefly press for 3 sec to SETUP mode
Turn the knob to s itch bet een inputs
Aut Select M de: Briefly press for 3 sec to ASM mode
Turn the knob to s itch bet een On/Off
V lumes and Filter Menu:
Right Kn b:
Briefly press for 3 sec to Filter Menu
Turn the knob to adjust volume by 1dB step

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You can choose bet een 5 filters:
Sharp R ll-Off Filter
Sh rt Delay Sharp R ll-Off Filter
Sl w R ll-Off Filter
Super Sl w R ll-Off Filter
Sh rt Delay Sl w R ll-Off Filter
Driver for Windo s do nloaded from http:// .z eimann.pl/Do nloads.php
In some scenario is better to choose WASAPI drivers instead of ASIO by default.

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EXAMPLE S REENS

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All trademarks and registered trademarks are the property of their respective owners.