The TOPPING D50s is a bluetooth hifi decoder DAC that supports both DSD512(native) and PCM 32Bit/768kHz file types. It comes with two ESS ES9038Q2M Sabre chips, leading dynamic range, and extremely low THD+N levels. The D50s also has XMOS and XU208 USB interface with customized drivers, along with OP amp sockets for DIYers to tweak the sound. It can also be combined with theTOPPING A50 Headphone Ampand theTOPPING P50 Linear Power Supplyto create a comprehensive audio setup with top sound reproduction.
Reviews:

• “Performance-wise it sounded like a mature, serious and very expensive device. In terms of technicalities, it has everything Id want: it sounds detailed, extended in the sub-bass and upper-treble, sounds linear without any drops in the FR, sounds extra fast and kicks hard when needed, can be also smooth and gentle with older recordings.” – Sandu Vitalie from Soundnews.Read the full review here.
• One of our favorite DACs has grown up and become even better. The D50s solidly eliminates the ESS IMD hump, adds the much needed remote control and Bluetooth without a premium in pricing. – amirm on Audio Science Review

Spec:

• Size: 11.9cm x 11cm x 2.6cm
• Weight: 510g
• Power Input: DC5V/1A
• Input: USB/OPT/COAX/BT
• Line Out: RCA
• D50s Output:
• DAC( LineOut COAX 96K Input)
• THD+N @A-weighting<0.0003%@1kHz <0.0004%@10-20kHz
• SNR @A-weighting>122dB@1kHz
• Frequency Response: 20Hz-20kHz (+0.1dB)
• Output Level: 2Vrms OdBFS
• Noise: <2uVrms
• Channel Crosstalk: -130dB @1kHz
• Channel Balance: 0.025dB
• USB In:
• 44.1kHz-768kHz/16bit-32bit
• DSD64-DSD512(Native)
• DSD64-DSD256(Dop)
• OPT/ COAX In: 44.1kHz-192kHz/16bit-24bit, DSD64(Dop)
• Bluetooth In: AAC/SBC/APTX/APTX LL/APTX HD/LDAC

Included:

• DC cable
• USB cable
• Bluetooth antenna
• Remote control
• User’s manual
• Warranty card