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The SMSL D2R MK2 is a balanced DAC designed to handle the digital-to-analogue conversion of high-resolution audio streams, utilising a ROHM BD34302EKV chip combined with an XMOS XU-316 interface to ensure precise signal processing. It supports PCM formats up to 32-bit/768 kHz as well as DSD512, whilst maintaining a measured distortion of 0.00013% (-117 dB), thereby preserving signal linearity across the entire audible spectrum.
It combines a segmented internal architecture, a linear power supply and advanced digital signal processing, ensuring stable and consistent conversion. This approach enables it to shape the output signal with precise timing control, whilst maintaining broad compatibility with modern digital sources.
The SMSL D2R MK2 utilises a ROHM BD34302EKV DAC chip combined with an XMOS XU-316 USB interface, designed to ensure digital-to-analogue conversion with extremely low distortion, measured at 0.00013% (-117 dB), thereby preserving signal integrity even at the lowest levels. This architecture supports PCM streams up to 32bit 768kHz as well as DSD512, whilst MQA and MQA-CD compatibility extends support to content encoded with hardware decoding, ensuring faithful reproduction in high-resolution playback scenarios.

The internal circuitry is designed to separate the analogue and digital sections, thereby minimising cross-talk that could degrade low-amplitude signals, whilst maintaining electrical stability across all critical stages. This approach is further enhanced by the integration of a linear power supply based on a Noratel transformer, whose regulation limits the switching noise typically associated with switching power supplies.


The D2R MK2 features an internal OCXO (Oven-Controlled Crystal Oscillator), whose thermal stabilisation maintains a constant reference frequency, thereby significantly reducing digital signal jitter. This temporal precision minimises synchronisation errors during conversion, thereby preserving the subtle nuances of the audio signal.
By stabilising the entire digital processing chain, this approach ensures consistent playback over time, a benefit that is particularly noticeable with complex signals or high-resolution recordings, where the accuracy of the clock directly determines the fidelity of the output.
The integration of a latest-generation Qualcomm Bluetooth chip expands wireless connectivity options, whilst maintaining compatibility with LDAC, aptX-HD, SBC and AAC codecs, thereby enabling the transmission to be adapted to the source quality and bandwidth constraints. This codec management enables optimised audio streaming depending on the connected devices, whilst maintaining consistent sound reproduction.


Technical characteristics
| Specifications | |
|---|---|
| Product type | DAC |
| Inputs | 1x USB-C 1x Optical Toslink 1x Coaxial 1x HDMI I2S 1x AES/EBU Bluetooth 5.4 |
| Outputs | 1x Stereo RCA 1x Stereo XLR |
| DAC chip | ROHM BD34302EKV |
| Supported sampling rates | PCM 32bit 768kHz DSD512 |
| Supported Bluetooth codecs | SBC, AAC, aptX, aptX HD, LDAC |
| Line output level | XLR : 5Vrms RCA : 2.5Vrms |
| Total harmonic distortion more noise (THD+N) | XLR : 0.00013% (-117dB) RCA : 0.00017% (-115dB) |
| Dynamic range | XLR : 123dB RCA : 122dB |
| Signal-to-noise ratio (SNR) | XLR : 123dB RCA : 122dB |
| USB transfer mode | 2.0 asynchronous |
| USB compatibility | Windows 7 / 8 / 8.1 / 10 / 11 : Driver required Mac OSX 10.6+, Android, iOS, Linux : Driverless |
| General | |
|---|---|
| Power supply | 100-240V AC |
| Consumption | 30W |
| Dimensions | 279.8 x 50.8 x 255.1mm |
| Weight | 3.25kg |
| Color | Black |
| Package | 1x SMSL D2R MK2 1x Power cable 1x Antenna 1x Remote control |
| Input | SPDIF |
| Input | Bluetooth |
| Input | AES/EBU |
| Input | USB |
| Input | Optical |
| Input | I2S via HDMI |
| Output | XLR |
| Output | RCA |
| DAC / ADC Chip | ROHM BD34302EKV |
| Max sampling rate | DSD512 |
| Max sampling rate | MQA |
| Max sampling rate | 768kHz |
| Color | Black |
| Networking | No |
| Remote Control | Yes |