The SuperBolt is JHS Pedals’ attempt to deliver that exploding-little-amp sound in a stompbox. The all-analog pedal is based on the sound of the Supro S6420 Thunderbolt allegedly used on early Zeppelin records, and it manages to replicate the sounds of the Silvertone, Supro, Harmony, and Oahu amps Valco built in the early ’60s.