New Orleans sludge/doom outfit Hawg Jaw embody the Crescent City's grimy, humidity-soaked approach to heavy music — slow, churning, and perpetually on the verge of collapse in the best possible way. Since 2009 they've been one of the Bayou scene's more viscerally satisfying acts.

Named for the folding knife favored across rural Appalachia, Manchester, Kentucky's Hawkbill play sludge metal with the blunt, unhurried menace of the region itself. Since 2017 they've crafted a sound that feels earned rather than stylistically borrowed — all low end and coal-seam grit.

California stoner/doom outfit Hawnt deal in slow, narcotic riffs draped in reverb and psychedelic haze, the kind of music that turns a room dim and heavy. Active since 2015, their approach leans into the occult-tinged desert rock lineage without losing its own ghostly character.

Hawthorne Heights became unlikely emo icons from Dayton, Ohio, with their 2004 debut 'The Silence in Black and White' producing the inescapable hit 'Ohio Is for Lovers.' The band's blend of screamo intensity and pop-punk accessibility, featuring JT Woodruff's dual clean-and-screamed vocal approach, defined the mid-2000s emo movement for millions of fans. Despite personal tragedies including the death of guitarist Casey Calvert, the band has persevered, continuing to release music and tour with the resilience their loyal fanbase mirrors.

Jacksonville's Haxprocess represent the progressive wing of extreme metal, threading death metal brutality and thrash aggression through complex, technically demanding arrangements that betray a taste for conceptual ambition. For a band formed in 2022, they've arrived with a surprisingly developed sound.

Out of Wellsville, Ohio, Haxxan have channeled raw, atmospheric black metal into their work since 2017, building on a tradition of American underground black metal that prizes sincerity and darkness over production values. Their Bandcamp presence signals a deliberately lo-fi, DIY aesthetic.

Chicago's Hay Perro occupy the scrappy intersection of heavy metal and punk rock, a loose and energetic hybrid that's been a fixture of the city's underground scene since 2011. Their bilingual name hints at a community and identity outside the genre's standard demographic.

Hoboken's Hayaino Daisuki translates roughly as 'I love speed' — and they mean it, delivering blistering blasts of thrash-infused grindcore that rarely slow long enough to catch a breath. Since 2008 they've been one of New Jersey's most furiously paced metal exports.

Haywire is a Boston hardcore project centered on Austin Sparkman, surfacing in 2023 with a sound that connects classic Boston hardcore aggression to rough-edged punk rock catchiness. Conditioned for Demolition introduced short, blunt songs built on gang vocals, hard downstrokes, simple but forceful riffs, and a street-punk sense of forward motion. The band's identity quickly expanded beyond pure hardcore with material like For Better Or For Worse, where melodic hooks, sing-along choruses, and even ballad-like turns sit beside mosh-ready tracks. That contrast is part of the appeal: Haywire can sound primitive and confrontational, but the songs often reveal a strong ear for compact pop structure under the noise. The Boston context matters musically because the band draws from a lineage of no-frills regional hardcore, yet the writing is more flexible than scene shorthand suggests. Haywire's short history has been marked by rapid touring, high-energy live response, and a growing catalog that treats hardcore as a base for rowdy, emotionally direct punk songs with enough melody to stick after the pit clears.