TOPPING DX3 Pro Plus Desktop DAC and Headphone Amplifier User Manual
- July 21, 2024
- TOPPING
Table of Contents
DX3 pro +
Desktop DAC & Headphone amplifier
User Manual
Thank you for purchasing the Topping DX3 Pro+!
DX3 Pro+ is a high performance DAC which has Optical, Coaxial, USB and
Bluetooth inputs, it also provide Line out and Headphone out.
USB of DX3 Pro+ is compatible with 768kHz/32bit and DSD512.DX3 Pro+ is
designed to be simple and equipped with LED display screen. It can be used as
not only a DAC + Headphone amp but also a simple DAC or DAC + pre-amplifier.
We believe that high-quality DX3 Pro+ could bring you more fun at enjoying
HIFI music.
Contents list
DX3 Pro+ x1
DC 15V/1A power adapter x1
Remote control x1
USB cable x1
Bluetooth antenna x1
User manual x1
Warranty card x1
Note: You can download the drivers and user manual on http://www.topping.audio/.
Attribute
Measured
| 12.0cm x 16.5cm x 4.0cm
---|---
Weight
| 420g
Power input
| DC15V/1A@DC base 5.5*2.1
Signal input
| USB/OPT/COAX1/COAX2/BT
Line Out output
| RCA
Headphone amp output
| 3.5mm headphone output jack
Display
| LED
Power consumption
| <6.0W
Front panel
1-1 3.5mmheadphone output
1-2 LED screen
1-3 Remote control receiver
1-4 Volume knob /Multi-function Button
Rear panel
2-1 Right channel single-ended RCA output
2-2 Left channel single-ended RCA output
2-3 Coaxial SPDIF input 2
2-4 Coaxial SPDIF input 1
2-5 Optical SPDIF input
2-6 USB input
2-7 Bluetooth input
2-8 Power input (DC15V)
Display
3-1 Signal input indication (if the current input is connected successfully,
the current input indication is always on, otherwise, the indication flashes.)
3-2 Gain indication
3-3 Output channel
3-4 Digi display area
3-5 Volume unit
3-6 Decoding format indication
Remote control
4-1 Standby
4-2 Volume up
4-3 Switch to previous input
4-4 Headphone amp output
4-5 Filter setting
4-6 Automatic standby
4-7 Mute
4-8 Headphone amp & Line Out output
4-9 Switch to next input
4-10 Volume down
4-11 Line Out output
4-12 Headphone amp gain
4-13 Brightness*
*Note:
(1) “L-A” has the same brightness as “L-2”. The differences lie in when there
is no operation after 30 seconds under “L-A” mode, the screen will be
automatically turned off, only displays the current input. For example, when
it is in USB input, DX3 Pro+ displays as follow. You can press any button to
light up the screen.
(2) When DX3 Pro+ is in Bluetooth input state, keep pressing the brightness button for 3 seconds to disconnect the existing Bluetooth connection and forcibly enter into Bluetooth pairing state.
Input range
USB IN
| PCM 44.1kHz-768kHz/16bit-32bit
---|---
DSD DSD64-DSD512 (Native), DSD64-DSD256 (Dop)
COAX/OPT IN
| PCM 44.1kHz-192kHz/16bit-24bit
DSD DSD64 (Dop)
BT IN
| AAC/SBC/APTX/APTX LL/APTX HD/LDAC
Specifications
DX3 Pro+ Decoding parameters (USB In@96kHz)
THD+N@1kHz (A-wt)
| <0.00015%
THD @20-20kHz (90kBW)
| <0.00020%
SNR@1kHz (A-wt)
| 122dB
Dynamic Range@1kHz (A-wt)
| 122dB
Frequency Response
| 20Hz-20kHz (+0.3dB)
20Hz-40kHz (+0.7dB)
Output Level
| 2.1Vrms @0dBFS
Noise (A-wt)
| <1.8uVrms
Channel Crosstalk @1kHz
| -137dB
Channel Balance
| 0.3 dB
Output Impedance
| 20Ω
DX3 Pro+ Headphone Amplifier specifications
THD+N@1kHz (A-wt)
| <0.00015% @Output=1500mW (32Ω)
<0.00013% @Output=160mW (300Ω)
THD@20-20kHz (90kBW)
| <0.0005% @Output=1500mW (32Ω)
<0.0005% @Output=160mW (300Ω)
SNR@MAX OUT 1kHz (A-wt)
| 120dB
Dynamic Range@1kHz (A-wt)
| 120dB
Frequency Response
| 20Hz-20kHz (+0.3dB)
20Hz-40kHz (+0.7dB)
Output Level
| 5.5Vpp @G=L
21.5Vpp @G=H
Noise (A-wt)
| <2.1uVrms @G=L
<7.0uVrms @G=H
Channel Crosstalk @1kHz
| -90dB
Gain
| 6.0dB(Vrms/FS) @G=L
19dB(Vrms/FS) @G=H
Output Impedance
| < 0.1Ω
Output Power
| 1800mW x 2 @32Ω THD+N<0.1%
900mW x 2 @64Ω THD+N<0.1%
250mW x 2 @300Ω THD+N<0.1%
Adapter Impedance
| >8Ω
Operation
Power on & off / standby operation:
(1) Power on: When connect to power supply, DX3 Pro+ enters the standby
state, the screen displays a bright spot.
(2) Standby setting: When it is working, press and hold the knob on the front
panel to enter standby state and short press to exit standby state when it is
in standby. Or you can directly press the standby button on remote control to
enter or exit standby state.
Note:
When the automatic standby function is on, if the current input is not
connected or input signal is invalid in 1 minute, it will automatically enter
the standby state. Once having detected valid signal, it will automatically
return to working state.
Volume setting:
(1) Mute setting and volume restoring: Use the mute button on the remote
control to set mute, press the mute button again or adjust the volume to
restore volume.
(2) Volume adjusting: Adjust volume by the knob on the panel or up or down
button on the remote control. Long press the volume up/down button will
quickly adjust the volume, so please be careful in order to protect your
hearing.
Note: When Line Out output, volume is fixed to 0dB in DAC mode and volume
adjusting is invalid in this mode.
Input channel switching:
Press the knob on the front panel or the “Switch to previous input button”
and the “Switch to next input button” on the remote control to switch the
input in cycle.
Output channel switching:
Double-click the multi-function button on the front panel or use remote’s
Headphone amp output button, Headphone amp & Line Out output button, Line Out
output button on the remote control to set the output mode. The “Line Out Out”
allows you to set the DAC mode and the Pre-amplifier mode, please refer to the
“Setup Menu” for settings.
Details of output channel
Output channel
| Indicator| 3.5mm Headphone output| RCA output| Adjustable Volume
---|---|---|---|---
Headphone amp| headphone indicator is on| √| ✕| √
Headphone amp +Line out
| headphone indicator is on, DAC indicator is on| √| √| √
Line Out| DAC| DAC indicator is on, sampling rate is displaying on screen| ✕|
√| ✕
Pre-amplifier
| DAC indicator is on, volume is displaying on screen| ✕| √| √
Setup Menu
Enter the setup menu:
Press and hold the knob first when the power is off, and then power up to
enter the setup menu.
Change and save of settings:
(1) The volume knob on the front panel: press the knob to enter the next
setting item, rotate the knob to set different parameters. Press and hold the
knob until “8-8” is displayed on the screen to save the settings.
(2) The remote control: press the volume up/down button to enter the
previous/next setting item, press the left/right button to set different
parameters. Press and hold the middle button until “8-8” is displayed on the
screen to save the settings.
Setting descriptions:
1. PCM filter setting (available for remote control setting, set PCM
filter mode when playing PCM)
Screen display
| Description
---|---
F-1|
Brick-wall
F-2
| Fast roll off corrected minimum
F-3|
Fast roll off (default)
F-4
| Slow roll off minimum
F-5|
Fast roll off minimum
F-6
| Slow roll off linear
F-7|
Fast roll off linear
2. Screen brightness setting (Available for remote control setting)
Screen display
| Description
---|---
L-1|
Low
L-2
| Mid (default)
L-3|
High
L-A
|
Mid brightness and screen will be turned off automatically after 30 seconds of no operation
3. Automatic standby setting (Available for remote control setting)
Screen display
| Description
---|---
A-O|
Auto on (default)
A-C
|
Auto off
4. Line Out channel setting (Available for remote control setting)
Screen display
| Description
---|---
O-1|
Line Out output
O-2
| Headphone amp output
O-3|
Headphone amp & Line Out output (default)
5. Output mode setting
Screen display
| Description
---|---
m-p|
Per-Amp mode (Volume adjustable) (Default)
m-d
|
DAC mode (Volume nonadjustable)
6. Headphone amp gain (Available for remote control setting)
Screen display
| Description
---|---
GAIN +6dB|
6dB (Vrms/FS) (default)
GAIN +19dB
|
19dB (Vrms/FS)
7. Bluetooth setting
Screen display
| Description
---|---
BT ON|
Bluetooth enabled (default)
BT OFF
|
Bluetooth disabled
Factory reset:
In standby state, turn the knob on the front panel counterclockwise until
the screen lights up completely, and the factory settings can be restored.