MELVINS Blasting their way through the musical trends of the past 30 years, Melvins' mutation of punk and metal, an unwieldy tank cruising and oozing sludge, still packs a wallop. Sure, they can be accused of repetition, but the lads, and their fans, don't give a shit, thank you very much. The core duo, guitar abuser and vocalist Buzz Osborne and primal drummer Dale Crover, have wrought mayhem on countless recordings and singles, and have also worked individually with several experimental outfits. Melvins' recent EP, The Bulls & the Bees, is available for free (the carmaker Scion bankrolled the recording) and a new album is in the works for release this summer. The unrelenting noisemakers Unsane will open. $15-$18. Amos' Southend.