APL Hi-Fi DSD-SR MK2 is a high-quality digital-to-analog converter that supports a wide range of digital inputs including USB, coaxial, optical, AES/EBU and even two proprietary DTR inputs for direct connection to APL Hi-Fi digital sources. It features both single-ended RCA and balanced XLR analog outputs.
DSD-SR MK2 can handle PCM signals up to 384kHz/32-bit, and DSD signals up to DSD256 (both DoP and native DSD). It also has a built-in PCM to DSD modulator which allows you to convert incoming PCM signals to DSD for playback.
APL Hi-Fi DSD-SR MK2 is a high-quality digital-to-analog converter that supports a wide range of digital inputs including USB, coaxial, optical, AES/EBU and even two proprietary DTR inputs for direct connection to APL Hi-Fi digital sources. It features both single-ended RCA and balanced XLR analog outputs.
DSD-SR MK2 can handle PCM signals up to 384kHz/32-bit, and DSD signals up to DSD256 (both DoP and native DSD). It also has a built-in PCM to DSD modulator which allows you to convert incoming PCM signals to DSD for playback.
OWNER’S MANUAL
DSD-SR MK2
digital to analog converter
The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated “dangerous voltage” within the
product's enclosure that may constitute a risk of electric shock.
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying to this component.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT
REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE.
SERVICE MUST BE PERFORMED BY QUALIFIED PERSONNEL ONLY
To reduce the risk of re or electric shock, do not expose this apparatus to rain or moisture. To avoid electrical
shock, do not open the cabinet. Service must be performed by qualied personnel only.
Batteries, whether installed in the component or not, shall not be exposed to excessive heat such as sunshine,
re or the like.
WARNING
To prevent risk of re or electric shock, do not place objects lled with liquids on the apparatus. Install this
unit so the AC power cord can be unplugged from the wall socket immediately in the event that becomes
necessary.
PRECAUTIONS
2
Table of Contents
2
3
WARNING AND PRECAUTIONS
Table of contents
Front Panel
Back Panel
Front panel display
Remote control
Connection
Notes on use
Specifications
Warranty
Notes
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Front panel
3 2 4
5
4
61
1 POWER BUTTON
Turns the unit ON, or sets to Standby mode.
2
3 DISPLAY BUTTON
Use this button to select from the four brightness levels and display OFF.
When the display is OFF, the next push of the button will result in maximum brightness for the display.
4
FRONT PANEL DISPLAY WINDOW
Please see description on page 7.
5
INPUT SELECT BUTTON
Use this button to switch the input source selection
between Coax1, Coax2, USB, DTR1, DTR2, OPT and AES/EBU.
6
VOLUME DOWN BUTTON
Decreases volume in 0.5dB steps.
VOLUME UP BUTTON
Increases volume in 0.5dB steps.
Back panel
5
2
1
3 4
5 6 7
8
10
9
1
ANALOG OUT UNBALANCED RCA L/R jacks
Connects a component with analog input jacks, such as a preamplier, power amplier, etc. using
an RCA audio connection cable.
2 ANALOG OUT BALANCED XLR L/R jacks
Connects a component with XLR input jacks, such as a preamplier, power amplier, etc. using
an XLR (balanced) cable .
3
4
DIGITAL IN COAXIAL1 and COAXIAL2 jacks
Connects a component with the coaxial digital output jack, such as a CD player/transport, MD deck, computer, etc.
using RCA S/PDIF digital coaxial cable.
5
DIGITAL IN USB jack
Connects a computer via USB. Please see page 10.
6
DIGITAL IN AES/EBU jack
Connects a component with balanced digital output jacks, such as a CD player/transport, MD deck, computer, etc.
using AES/EBU digital cable.
7
FUSE
Main power fuse 1A 125v/250v.
8
9
AC IN jack
Connects the AC power cable.
OPTICAL IN jack
Connects a component with the Toslink optical output jack, such as a CD player/transport, MD deck, computer, etc.
using an optical digital cable.
DTR1 IN and DTR2 IN jacks
Proprietary digital connection with the APL HI-FI Digital Transport or Network Streamer only.
10
VOLTAGE SIGN
Indicates mains voltage operation, factory pre-set.
5.6MHz
0.00dBVOLUME
DF-SLOW
COAX1
DSD128
44k ->
Front panel display
5
4
3
2
6
6
1 DIGITAL INPUT INDICATOR
Displays the digital input source selection.
2 INPUT SAMPLING FREQUENCY INDICATOR
Displays the sampling frequency and digital format (PCM or DSD).
3
PCM TO DSD ENCODER INDICATOR
Displays PCM to DSD modulator rate, user selectable between DSD128 or DSD256.
4 DFILT
Displays the Digital Filter selection. Normal (sharp-rollo), Slow (slow-rollo) and Zero (non-oversampling).
There is no Digital Filtering when processing native DSD.
5
6 VOLUME BAR
Displays the volume setting.
MODULATOR FINAL DSD SAMPLING FREQUENCY INDICATOR
Displays the nal DSD rate, prior to D/A conversion.
1
Remote control
7
2
12
5
4
3
8
2
3
DIGITAL INPUT SELECT BUTTONS
Use these buttons to switch the digital input source selection:
Coax1, Coax2, USB, DTR, OPT and AES/EBU for DAC.
SE1, SE2, SE3 and XLR for AMP.
4
DISPLAY DIMMER AND DISPLAY OFF MODE BUTTON
Use this button to alternate between 3 display dimming modes
and OFF. The next step after display OFF is maximum brightness.
5
VOLUME UP/DOWN BUTTONS
Attenuator controls volume in 0.5dB steps.
1
POWER BUTTON
To turn the DTR-MR transport ON or OFF, press and hold the
power button for 3 seconds.
6
MUTE BUTTON
This button works with both the AMP and DSD-SR.
Press once to Mute and once more to un-Mute.
6
7
9
11
1
OPEN/CLOSE BUTTON
For DTR-MR digital transport.
FILTER BUTTON
Toggles between Normal, Slow and Zero digital lters for DAC.
DSD BUTTON
Sets PCM to DSD modulator rate to DSD128 or DSD256.
7
8
9
11
12
PHASE BUTTON
Due to design topology, this button does not operate with the DSD-SR.
DAC SELECTION BUTTON
Always press this button to control the DAC.
AMP SELECTION BUTTON
Always press this button to control the AMP.
DIGITAL TRANSPORT CONTROL
These buttons control the DTR-MR and work independently from
the AMP or DAC selection.
10
10
RC-IS is the universal remote control to use with
DSD-SR, HAS-M and DTR-MR.
DIGITAL OUT
(COAXIAL)
Digital device (CD player etc.)
USB cable
Computer
Connection
Amplier, pre-amplier, etc.
XLR cable
LINE IN
DIGITAL OUT
(AES/EBU)
RCA audio cable
Amplier, pre-amplier, etc.
LINE IN
8
DIGITAL OUT
(COAXIAL)
Digital device (CD player etc.)
DIGITAL OUT
(DTR)
APL HI-FI Digital device ONLY
Optical digital cable
APL HI-FI dtr cable
RCA digital coaxial cable
DIGITAL OUT
(optical)
Digital device (CD player etc.)
RCA digital coaxial cable
XLR digital coaxial cable
Wall socket
Digital device (CD player etc.)
DIGITAL OUT
(DTR)
APL HI-FI Digital device ONLY
APL HI-FI dtr cable
Notes on use
USB INPUT:
The DSD-SR MK2 is equipped with an XMOS based USB chipset that does not require a driver for Mac or Linux OS.
However, a driver is required for Windows. Please contact us in order to obtain the Windows driver:
info@aplhi.com
After you have received the Windows driver from us, please connect the DSD-SR MK2 to the computer via USB cable
and then initiate the driver installation. Please note that, if the DSD-SR MK2 is not powered On and connected to
the computer with USB cable, the driver will not install properly.
When connecting the DSD-SR MK2 to Linux based external audio renderers, please make sure that the DAC is
powered On rst, prior to connecting the USB cable to the audio renderer.
In other words, please always start the DSD-SR MK2 rst and then the audio renderer. Please note that the
DSD-SR MK2 does not use the +5V power from the USB bus coming from the computer or streamer.
DTR INPUTS:
The DSD-SR MK2 features two proprietary DTR inputs – DTR1 and DTR2. These inputs are intended for connecting
APL Hi-Fi digital sources only, such as the DTR-MR CD/SACD transport and the DNP-SR network streamer.
FRONT DISPLAY:
It is highly recommended to use the display O mode for best sound quality.
This mode is set by pushing the DISPLAY button on the front panel or remote.
The display will show the changes made and then shut O again in approximately 3 seconds.
DIGITAL FILTERS SELECTION:
DSD-SR MK2 digital lters can be selected by pressing the FILTER button on the remote. That button toggles
between Zero (non-oversampling), Slow (slow-rollo ) and Normal (sharp-rollo). The digital lter selection
is possible only with PCM format. The digital lters do not work for Native DSD playback.
REQUIRED BREAK-IN TIME:
It takes around 200-300 hours of break-in time for the DSD-SR MK2 to fully settle.
Please make sure to run the DSD-SR MK2 in your audio system for a minimum of 3 days,
prior to any critical evaluation.
If you have any questions of concerns, please do not hesitate to contact us - info@aplhi.com
9
© 2020 APL HI-FI, ltd., All Rights Reserved. APL Hi-Fi reserves
the right to amend specications & design without notice.
Digital Inputs
• Two S/PDIF Coaxial digital inputs.
• AES/EBU professional standard balanced digital input.
• Optical TOSLINK digital input.
• Note! S/PDIF and AES/EBU inputs accept up to 192kHz/24bit PCM.
• USB input accept up to 384kHz/32bit PCM, DSD64 and DSD128 in DoP format,
as well as DSD64, DSD128 and DSD256 in NativeDSD format.
• Two proprietary DTR inputs for connecting APL Hi-Fi digital sources only.
Analog Outputs
• Single Ended RCA.
• Balanced XLR.
• Output level - 2.1V RMS at 0dBFS for RCA and 2.1V+2.1V for XLR.
• Output impedance - approximately 150 Ohms, resistor limited.
Power input and fuses
• IEC power inlet.
• 115V or 230V / 50-60Hz, factory pre-set.
• Other power input voltages available on request.
• 1A ceramic fuse.
Dimensions and weight
• W450 x H120 x D380 millimeters.
• Front panel width - 450 millimeters.
• Height with feet included - 140 millimeters.
• Weight - 12kg unpacked.
Included Accessories
• Infrared Remote Control capable of controlling DTR-MR, DSD-MR and HAS-MR.
• User Manual
• Certicate of Authenticity
Specications
10
Warranty
11
Overall Warranty Information
• The DSD-SR MK2 comes with a standard 2 years parts and labor warranty coverage.
• The standard 2 years warranty can be extended to 5 years by registering your DSD-SR MK2.
Please note! This is a non-transferable warranty. It is available only to the original owner who registered the product.
Please visit our web page and select “Register your product” on the right of the top menu.
Voiding the warranty
• The warranty sticker on the bottom is removed or damaged.
• The unit is serviced by an unauthorized person or service.
• There are signs of liquid spill damage inside the unit.
• There is a metal object causing shorts found inside the unit.
• There are damages caused by improper use.
• The electronics are damaged by over-voltage at the IEC inlet.
User Notes
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APL Hi-Fi DSD-SR MK2 is a high-quality digital-to-analog converter that supports a wide range of digital inputs including USB, coaxial, optical, AES/EBU and even two proprietary DTR inputs for direct connection to APL Hi-Fi digital sources. It features both single-ended RCA and balanced XLR analog outputs.
DSD-SR MK2 can handle PCM signals up to 384kHz/32-bit, and DSD signals up to DSD256 (both DoP and native DSD). It also has a built-in PCM to DSD modulator which allows you to convert incoming PCM signals to DSD for playback.
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