Inspired by the reviews I tried these in my repro Princeton Reverb.
I defintely confirm their findings. Much appreciated support and super fast shipping.
Recommended to replace standard cathode bypass capacitors in the preamp section.
Small detail, little money but serious upgrade in tone.
Just because the idea to use a bipolar here, I would rate an extra star if i could.
Awesome! Incredible improvement in tone.
By recommendation of TAD I have replaced all my cathode caps with the bipolar 25µF in the Fender clones I am building. Seems like removing a curtain revealing all the details I was looking for all the time. Much better focus in bass and that air and chime in the upper register.... Not just more top end, but just nicer, easier, more detailed and much more musical.
Thanks to everybody at TAD for their ongoing support in improving tone.