Good to know guys thanks…. The Super is one of my all-time favorite amps... Sounds like Fender's did a good job on this round of RI's. 15yrs in maintenance/repair on cnc's, actuators, 3 phase motors etc... a PCB is just another integrated linear circuit on a schematic. IMO…Way too much emphasis is put on make of construction PTP vs PCB (Sure if it’s defective …) In this case... IMO it’s the quality tone stack…& replicating it and getting it right that matters. Thanks I wasn't sure. Just guessing. What's the "Ultralinear"? A "one" channel signal path like the HRD series where the gain is induced into the signal at the front as opposed to a two channel/or cascade??