Agree with JM. Q4 used to maintain some freq for the piezo.
I guess this make the preamp character for the piezo sounds smooth in treble area.
BTW I succesfully made the circuit for the owner of this preamp.
So now he has 2 guitars with similar preamps:
- Godin (I forget the model) with this original LR Bags preamp
- budget Greg Bennet Les Paul with the "replica preamp"
Both of us love the tone. Even the customer feel sooo satisfied with the project
I guess this make the preamp character for the piezo sounds smooth in treble area.
BTW I succesfully made the circuit for the owner of this preamp.
So now he has 2 guitars with similar preamps:
- Godin (I forget the model) with this original LR Bags preamp
- budget Greg Bennet Les Paul with the "replica preamp"
Both of us love the tone. Even the customer feel sooo satisfied with the project