HH9, or Hydra Head Nine, is an industrial/noise/power electronics project from Sweden.

Fake bio says it's a duo of Nordvargr and S. Halibot, but actually Halibot is just made up by Nordvargr and it's really a solo project of Henrik Nordvargr Björkk.

HH9 is an exploration by Nordvargr (MZ.412/Folkstorm/Toroidh fame) of the slightly more structured and rhythmic side of power electronics. The characteristic harshness and full audio spectrum utilisation in power electronics is still unmistakeably present in the brutal aural assault they deliver.