Dinosaur Jr.’s guitar assaults are forces of nature. Standing tall before his four amp setup—which includes two Marshall full-stacks—J Mascis achieves a distinct and rich sound, one that brilliantly blends melodic and textural playing. His primary guitar is a 1963 sunburst Fender Jazzmaster that sports replaced covers, pickups, and knobs in addition to a switched-out bridge. Secondarily he jams a 1965 Jazzmaster, also sunburst, but with original knobs and pickups. His pedalboard is another story altogether, utilizing everything from Electro-Harmonix’s Big Muff and POG2 Polyphonic Octave pieces to a KR Mega Vibe Vibrato Pedal. This is all to say that while Dinosaur Jr. may appear to have been shredding with the greatest of ease for over 25 years, Mascis’ full, dynamic sound is the product of years of fine-tuning a vast array of meticulously selected components.