Great for the price!
Put two of these in a cheap Fosi Audio P2 headphone amplifier with great results! Better "control" through the whole register.

Very good but...
Nice design and operates well instead of my first views that the sound was linear, after a few more tests with another aet that...

Dood absorbers, just rubber is slightly hard.
Absorbers looks good, nice made, easy to use, little bit small, but because rubber is slightly stronger, harder, is possible to...