When I hook it up to play there is music for a second or two and then no music for a second or two. This repeats itself over and over again. Ideas?

I do not have that problem with this device, HOWEVER, I do have that very same problem with another SMSL dac ( M500 MKII), and I have not been able to figure out why this happens. I do not use Windows, and I only play wav files with Linux based software, and Linux operating system. Make your own conclusions.

how come the output voltage is so low when I connect it to the optical on my TV? I thought the output was suppose to be 2 Vrms.

only tried whit coaxial in rca out

Without a separate power input, how much faster does the battery drain on the cell phone?

It consumes very low energy. I don't use it via USB. I haven't tested it.

I'd like to listen to one of those new MQA-encoded CDs. Will the optical output of my legacy CD player pass the MQA-encoded signal to this SMSL?

Yes, because the SMSL is reading, converting the signal and your legacy CD player is functioning as a transport only.

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S.M.S.L SU-1 MQA MQA-CD Audio Decoder AK4493S XU316 768kHz/32Bit DSD512 Hi-Res DAC

Product ID: 730328152

Details

Brand
Fanmusic
Interface Type
USB
Number of Channels
2
Number of Pins
4
Product Dimensions
9.6L x 7.8W cm

⚡USB asynchronous transmission up to 768kHz/32bit

🎧AK4493S DAC chip with ultra-low distortion 0.00013%

🔊Supports MQA & MQA-CD for authentic 3D soundstage

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Description

🎶 Elevate your sound — because your ears deserve the future of audio.

UNIVERSAL DEVICE SUPPORT - Plug and play across Windows, Mac, Linux, Android, and iOS platforms with driverless or driver-based USB compatibility.
COMPACT POWERHOUSE DESIGN - Sleek, lightweight (195g) form factor with ultra-low power consumption (<5W), perfect for any desktop or mobile setup.
PURE AUDIOPHILE PRECISION - Experience near-zero distortion with the cutting-edge AK4493S DAC chip, delivering crystal-clear sound at 0.00013% THD+N.
TRUE 3 D SOUNDSTAGE WITH MQA - Unlock the full depth of your music library with MQA and MQA-CD support, recreating live-performance spatial accuracy.
SEAMLESS HIGH RES COMPATIBILITY - Effortlessly handle massive resolution files up to 768kHz/32bit PCM and DSD512 for the ultimate hi-res audio experience.

The S.M.S.L SU-1 is a premium MQA and MQA-CD compatible DAC featuring the latest AK4493S chip, delivering ultra-low distortion and a dynamic 121dB range. Supporting USB asynchronous transmission up to 768kHz/32bit and DSD512, it ensures pristine high-resolution audio playback across all major platforms. Compact and energy-efficient, the SU-1 transforms digital audio into a true 3D sound experience, perfect for discerning audiophiles and professionals seeking flawless sound fidelity.

Specifications

ASIN	B0C1Y7C9HH
Amazon Bestseller	#35,866 in Electronics ( See Top 100 in Electronics ) #29 in Digital-Analog Converters
Brand Name	Fanmusic
Compatible Devices	Earphones, Headphones both
Customer Reviews	4.3 4.3 out of 5 stars (1,676)
Interface	USB
Item Dimensions L x W	9.6L x 7.8W cm
Item Weight	195 Grams
Manufacturer	SMSL
Model	SU-1
Number of Channels	2
Number of Pins	4
Part Number	SU-1
Warranty Description	1 Year Mecha Warranty

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