These Supro reissue amps are electrically based on the originals, and they are all PCB-based. Each model has a trio of PCBs that are hand-wired, directly to the transformers and to each other. There are no plastic connectors. Vintage tone, modern construction. Ready to tour. Terminal strip construction (à la vintage Supro) is not reliable or allowed by safety regulations; and turret board construction (vintage Fender/Marshall) is not true to the original Supro build. So, PCB it is! Low noise and durable, great tone. Made in Port Jefferson, NY, USA.