One of the best, most cost-effective upgrades I've ever made in an audio system. This unit can be used with either a phone or a computer as an outboard DAC and allows excellent sound to be achieved with FLAC or similar hi-res audio files, especially using high-end headphones (e.g., Grado GS2000e). Highly recommended.
It's a nice amp that changes the sound stage and can be very powerful if you play tidal through your phone it over rides the main filter so watch the level it can be a little treble and harsh and the usb-a to usb-c is troublesome and will stop working at times the power gain match is good and the xbass is a nice option but the jury is still out is it eworth the price well that's up to you to decide you get what you pay for
Good for phones, more than enough power & recommendable!