In use for a good three years now. A very good device that can compete with significantly more expensive competitors in terms of sound quality.
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DAC ES9038Pro USB XMOS Bluetooth 5.0 32bit 768kHz DSD512

Little brother of the SMSL SU-9, the SU-9n is a modified version, with all the characteristics of its model, but this time without the support of MQA files, of the Bluetooth UAT codec and with a slightly less powerful USB interface, to reach a lower selling price. The conversion chip remains unchanged, the SU-9n using the excellent ESS ES9038Pro DAC, supporting high resolution files up to PCM 32bit 768kHz and DSD512.
Ergonomic, the SU-9n, like its big brother, displays a nice color screen on the front, with a rotary knob to easily navigate through the menus, adjust the volume level, select a source or turn the unit on and off.
The SU-9n is also equipped with a complete connectic. There are Toslink optical, coaxial and USB (XMOS XU208) inputs and single-ended RCA as well as balanced XLR outputs. The SMSL DAC also supports, thanks to a Qualcomm reception chip, Bluetooth 5.0 transmission, so it is possible to broadcast your music remotely, directly from a smartphone.
The internal design of the SU-9n, particularly careful and well thought out, allows it to develop a precise, rich and dynamic sound reproduction.

SU-9n
SU-9
THD+N
0.00006%
0.00008%
MQA
Not supported
Supported
Bluetooth
5.0 (UAT not supported)
5.0 (UAT supported)
Clock
CK-02 clock processing circuit
2x Low phase noise oscillators
XMOS
XU208 8 cores
XU216 16 cores
The SMSL SU-9n embeds a Bluetooth 5.0 QCC5125 reception chip from Qualcomm. It is thus possible to stream its music in wireless. Moreover, it supports some codecs of high resolution transmission, such as the aptX, the aptX-HD or the LDAC.

The SU-9n uses only high quality electronic components, integrated in a neat circuit, and contributing to the excellent sound reproduction of the device. The famous ES9038Pro DAC chip and the XU208 XMOS USB interface are used, as well as an ES9311Q ultra low noise linear voltage regulator, a clock circuit optimized for ultra low jitter and a shielded low noise power supply stage.


| 1 | Volume knob |
| 2 | Screen |
| 3 | IR Receiver |
| 4 | Bluetooth antenna |
| 5 | Optical input |
| 6 | RCA output |
| 7 | XLR output |
| 8 | Coaxial input |
| 9 | USB input |
| 10 | Power supply |

| Specifications | |
|---|---|
| Product type | DAC |
| Inputs | 1x USB-B 1x Optical Toslink 1x Coaxial Bluetooth 5.0 |
| Outputs | 1x Single-ended stereo RCA 1x Balanced stereo XLR |
| Output level (Pre mode) | XLR : 4.8Vrms RCA : 2.3Vrms |
| Output level (Fixed mode) | XLR : 4.3Vrms RCA : 2Vrms |
| THD+N | 0.000065% (-123.5dB) 0.000055% (-125dB, A-Weighting) |
| Dynamic range | XLR : 130dB RCA : 123dB |
| SNR | 130dB |
| Output impendace | XLR : 207Ω RCA : 142Ω |
| USB transmission mode | Asynchronous |
| USB compatibility | Windows 7 / 8 / 8.1 / 10 / 11 Mac OSX Linux |
| Supported sampling rates | USB : PCM up to 32bit 768kHz, DSD up to DSD512 Optical / Coaxial : PCM up to 24bit 192kHz, DSD up to DSD64 |
| Supported Bluetooth codecs | LDAC : 24bit 96kHz (990kbps / 660kbps / 330kbps) aptX-HD : 24bit 48kHz (576kbps) aptX : 16bit 44.1kHz (352kbps) SBC : 16bit 44.1kHz (328kbps) AAC : 16bit 44.1kHz (320kbps) |
| General | |
|---|---|
| Supplt voltage | 100-240V 50/60Hz (Cable included) |
| Consumption | 5W |
| Dimensions | 187.5 x 154 x 40mm |
| Weight | 790g |
| Housing material | Aluminum |
| Color | Black |
| Input | SPDIF |
| Input | Bluetooth |
| Input | USB |
| Input | Optical |
| Output | XLR |
| Output | RCA |
| DAC / ADC Chip | ES9038PRO |
| Max sampling rate | DSD512 |
| Max sampling rate | 768kHz |
| Color | Black |
| Networking | No |
| Remote Control | Yes |
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