The battery rests comfortably on top of the volume potentiometers.
The NFP Jazzplate is just an easy way for Jazz bass players to have the NFP filter sound on their instruments. It is solderless and it should fit on most Jazz basses on the market without any adjustments to the control cavity.
The control plate keeps its traditional configuration of Neck Vol and Bridge Vol that is always in-circuit ( M.Volume and Blend available upon request). It has a Passive/Active switch and an NFP Filter potentiometer which acts as the only EQ control.
Also, a new feature, not shown in the picture, is a 3-way passive Tone switch (as featured on our 800TS Jazzbass preamps). This switch allows for adding two levels of high cut on your signal before it hits the preamp acting as a passive tone, just without a potentiometer.
The NFP is a second-order Lowpass filter with a resonant peak on its cutoff point (4khz) and the potentiometer allows you to sweep from anywhere between 150hz and its cutoff point of 4khz.