https://martelmusicstore.com/products/summer-school-electronics-extra-credit-boost
Summer School Electronics Extra Credit Boost
The Extra Credit is two boost pedals in one. With the toggle switch to the left, the Extra Credit is a one-knob op-amp boost. With the toggle to the right, the...
summer school electronicsextra creditboost
https://www.gbmusicandsound.com/product-page/summer-school-electronics-gus-plus-bass-drive
Summer School Electronics Gus Plus Bass Drive | GB Music & Sound
The Gus-Plus is a bass-friendly version of the Summer School Electronics Gus-Drive. Usable with guitar, bass, or any instrument that needs to retain clarity,...
summer school electronicsgusplusbassdrive