No instrument modification needed!
The Shadow SH NFX-AC is an acoustic and classical guitar Nanoflex pickup. The flexible pickup mounts under the bridge saddle and the attached extremly light preamp with 3V cell battery holder, volume control and output socket mounts to the bridge end. 12-foot (4m) cable is included. Due to active amplification directly at the pickup and 100% shielding of the entire system, no sound will be lost and no hum created.