1.FIIO JT1 REVIEW

They are smooth treble, versatile, linear, controlled, don’t present coloration, nor peaks. Treble 100% free from causing hearing fatigue. I didn’t feel stridency, harshness, piercing, or sibilance. The sparkle has a more polished characteristic, although it doesn’t sound completely off. For my taste, I think it could have a little more detail and airy, just as I already noticed in the Hifiman HE400SE. On the JT1, drum cymbals are very natural. Hi-hats are smooth, without harshness. Chime brings a polished shine, free from stridency.

original link：FIIO JT1 REVIEW(iemsandmusic.com)