Thanks, I'm satisfied .

I was indifferent to the style and bought it simply due to its performance and features. Boy I was wrong, in person it looks delightful. The red button with corresponding theme and blueish black looks amazing. Surprisingly, the leatherette case is of good quality too. The app experience could be better, it has some glitches that should be fixed. I.e., custom EQ profile with flat filters and 0 db gain cuts the signal to 12 db, and thus the master level must be +12 to achieve the same volume as without EQ (however, it should be lowered when applying filters with positive gain). Also, I doubt that power consumption indicators display data correctly, and it also would be nice to see output V (for the purposes of using it as DAC only) and current/power (the Theme 5 basically duplicates the consumption figures, wich is redundant). But overall, I am satisfied with this product and hope it will serve me well.

The FiiO KA15 is a phenomenal portable USB DAC! Its crystal-clear audio quality brings unmatched depth and detail to your music. The sleek digital display is a standout feature, providing real-time sampling rates and volume levels for precise control. Compact, versatile, and stylish, it’s perfect for audiophiles on the go.

Good amplifier, pulled my DT 770 pro 80 OM, took this booster, because My player Fiio X3 LL, could not fully disclose these headphones due to lack of power.

Very good. My first DAC from this company. It took me a lot of time to adjust the settings, but it was worth it. Of course, if you listen carefully, someone may not like that it lacks subtleties like analyticity. But I wanted a break from the previous device I spent many years with, and I got what I wanted. Musicality and airiness of sound