The Black Winter pickup is a savagely high-output passive
  humbucker built for extreme metal, with no less than three large
  ceramic magnets to ensure maximum output and sustain in all
  high-gain situations. The custom overwound coil design delivers
  incredible clarity in the mids and highs, while the low end stays
  controlled and focused. The Black Winter is designed to handle
  any tuning, no matter how low you go, and its voicing facilitates
  aggressive palm mutes, fluid sweep picking, and punishing lead
  tones.
  Crushing distortion, vicious mids, and aggressive saturation are
  at your fingertips, without sacrificing string-to-string
  separation or sensitivity. The 7- and 8-string versions are built
  to handle even more extended-range low notes with ease. Pair the
  bridge Black Winter with the Black Winter neck model for maximum
  metal onslaught.
  Hand made in Santa Barbara, CA, we offer the Black Winter for
  6-string in standard humbucker and Trembucker sizes, as well as
  7- and 8-string string passive mount (with naked coils… brrr!).
  The Black Winter high-output passive humbucker ships with
  4-conductor lead wire for multiple wiring options, and is vacuum
  wax potted for squeal-free operation.