The HiFime UH1 is made by the same HiFimeDIY team that you know. We simply dropped the DIY from the name as this is not a DIY device anymore. Still, it has many useful features and can be used in different settings. It is based on the Savitech SA9227 asynchronous USB receiver clocked by two TCXO oscillators, PCM5102 dac chip and TPA6120 headphone amplifier.
The HiFime Digital to analog converter (DAC) sounds detailed and ultra clear with a huge sound stage. The two outputs are able to drive a wide range of headphones or can be connected to an amplifier. One output features a built in headphone amplifier while the other output is the direct output from the DAC chip. The direct output can also be used with many headphones and sounds very relaxed and open. The headphone output provides more punch and intensity. Which one you prefer will depend on the device you connect to the DAC.
Two quality TCXO are used as the master clock to control the timing. This asynchronous USB transfer mode will give the DAC the responsibility to clock the data transfer instead of of your computer which has a clock of lesser quality with more noise and jitter introduced.
It accepts up to 384kHz sample rates and 16/24/32 bit. No drivers are necessary on MAC and linux computers! On Windows it can work without drivers up to 96kHz/24bit and with ASIO drivers up to 384/32. (Note that not all programs support ASIO). There is a switch that switches between Low and High sample rate mode. When set to Low, it works up to 96/24 with no drivers needed in Windows.
It utilises the USB port for power, so no external power supply is required.
The UH1 also has several digital outputs which makes this device also a high resolution quality asynchronous USB to I2S, DSD, SPDIF and optical converter.
It also has optical INPUT which will redirect the optical signal to USB/computer. Note: The SPDIF/OPTICAL input does not go to ANALOG output!
There are two analogue outputs, both are on the front of the dac. The line out is direct from the PCM5102 dac chip and the headphone output is buffered with the TPA6120 headphone amplifier. The TPA6120 is a high fidelity headphone amplifier from Texas Instruments. The PCM5120 is a ground centred design meaning that it doesn't need any DC blocking capacitors on the output. Capacitors in the signal chain will always color the sound, so it will always be better to avoid capacitors in the signal chain. The analog outputs PCM only (not DSD as it's not supported by PCM5120)