Sound is bad, way too honky and harsh although it's a copy of the Sonicast Dirac+, the latter sounds still better, despite not being great either.
Would not recommend this, except if you are intending to use it with some EQ together with the ES100 maybe.
Here my EQ settings which makes the HE100 sound at least "normal":
31.5Hz -2dB
63Hz -1.5dB
125Hz -0.8dB
250Hz -0.4dB
500Hz 0dB
1kHz 0dB
2khz -3dB
4kHz -5dB
8kHz -0.5dB
16khZ +5dB
oluvI agree. I think mine sound almost broken without the EQ, except I boost bass and mid. I'm baffled by the good reviews I've seen on these. I gave them 2 stars on Amazon. With the EQ, though, I can make them sound pretty good to my ears.