Not trying to stomp on 10th, I know it's very personal what we like.
I am also in the same conclusion as
@doubletrobbel about the Penon 10th, it's overall a good IEM. But not God's gift blessed upon us, personally I find it quite average when we look at cost and sound.
I also would pick
EST50 as a tribrid over 10th. Bass quality is in a different league(subjective opinion ofc), as the 10th is soft and on the slower side. Treble also gentler while still being more sparkly in EST50, while more forward on 10th without the same sparkle.
What 10th does much better is vocals, it has a lusher thickness and warmth to it.
DTE900 I understand is in a higher price bracket, 10th on steroids? With faster, more impactful bass. Lush and full vocal and instrumental range, very much what Penon is known for. Treble with similar energy, but more airy and resolving.
Same for
Okavango, not saying it is better technically than 10th as an IEM. But bass, no competition really. I think this is what ruins the 10th for me, low end is not giving me satisfaction. Soft, fluffy, unnatural, slow.
And then its plenty of other releases from Penon I find better: Serial, Neo5, Globe, FAN, H30, H40, EST50.
And as
@doubletrobbel said:
Penon 10th is NOT a bad IEM, just not the one to end all competition.