SNAMM '18 - Supro Black Magick Reverb Demo Shawn HammondJuly 5, 2018VideoAt the request of superstar Lenny Kravitz, the storied company packs its popular 6973-driven amp with a reverb circuit composed of not just three, but six springs. supro6973videossnamm-2018tremologear-show-demotube-headgearspecial-featured-storiesampsreverbwhats-new