TCE Polytune test
Procedure:
Guitar to polytune input using DiMarzio guitar cable. Polytune output to amp using a 20 cm guitar cable. Polytune was off during the testing.
Results:
I tested the polytune with my ESP Horizon with JB and the differences are not noticeable, I could live with that. Then I tested the polytune with my Ibanez semihollow using the neck pickup. Loss of the low end is apparent. Increasing the low frequencies in the amp seems to fix that. Then I tested the polytune with my Ibanez prestige using the piezo pickups... ufff, loss of low end and high end is very notorious.
Conclusions:
TCE Polytune is NOT true bypass.
EDIT: polytune seems to reduce a bit the amplitude of the signal as well.