DAC Comparison

	Cyrus soundKey soundKey is an award-winning revolution in mobile music. Hi-Fi streaming services like TIDAL mean fantastic quality is available to subscribers, but phones lack the necessary hardware to get the best from this data. soundKey unlocks that data, using our years of expertise in high-resolution DAC and amplifier design. Cyrus quality audio is now available to everyone. $99.00 MSRP More Information	Topping D90 One of the top-of-the-line Topping DACs with support for balanced outputs, Bluetooth including LDAC and aptX codecs, and high resolution DSD512 and up to 32/768 PCM audio. $699.00 MSRP More Information
Features
Physical Dimensions
Mass	19 gram
Input/Output
Inputs	Micro USB	Coaxial S/PDIF IIS TOSLINK S/PDIF USB-B XLR 3-Pin AES-EBU
Outputs	3.5mm	Balanced 3-pin XLR RCA
Audio
Sample Rate	24 bit / 96 kHz	32 bit / 768 kHz
Frequency Response		20 Hz - 20 kHz
Portability
Wireless		Bluetooth
Bluetooth Codecs		AAC aptX aptX HD aptX LL LDAC SBC
Reviews	5/5 What Hi-Fi? What Hi-Fi? Awards 2020 winner. Mixed Audio Science Review I see it a step up from $9 dongles but the $99 price is hard to swallow.	Audio Science Review The Topping D90 produces lowest noise and distortion [of the] 220 DACs [I've] tested so far.