A better effect would be to direct mount the EMG pickup if you can- place a couble of dowels or shims under the pickup and screw the pickup directly into the body- it's good if you have an alder, poplar, or hard tonewood, not good for softer basswood. The bottom of the EMG pickup really picks up the vibrations from the body if it's done right, giving it a much bigger tone. Don't know if it really works with passives, but those EMG's really pick up the vibrations.