Preamp and piezzo

[luiscesaripad]

Let me ask this: does the boost preamp and piezzo on the JP13 and 15 use the same 9v battery or it uses 1 battery for the preamp and another one for the piezzo?

 

[PeteDuBaldo]

There is only one 9V battery in the JP13 / JP15.

 

[luiscesaripad]

Thanks!