I agree it may be a problem and I carefully considered that and looked at dozens of comments and most say it will drive it fine, but you won't get all that it has to give. While others said it has more than enough power.

Here is a good explanation, at least on paper it "sounds" good smile

Explaining power into headphones

Another calculation of driving HE1000

- Fiddler (IMHO)

If you think listening to music is fun, try learning an instrument.
HT: G61RSL, 4x5K, 5.5KHC, 2xSC6000, Transporter, HD621, Philips BDP7501 4K, Tivo, 65" LG OLED 4K C6
Computer: Foobar2000, 5K, Mojo, HiFiMan HE1000 V2