Electric stringed instrument having an arrangement for adjusting the generation of magnetic feedback

An electric stringed instrument comprising;

• an electromagnetic pickup positioned on the instrument, said pickup having a permanent magnet and a string signal detecting coil wound around the permanent magnet and magnetically combined with the permanent magnet,
• an electromagnetic force producing means for producing an electromagnetic force, being positioned close to the electromagnetic pickup, and having a driving coil,
• an adjusting means for reducing magnetic feedback and for receiving a part of a current flowing in the driving coil of the electromagnetic force producing means and being positioned so that it is magnetically combined with the string signal detecting coil of the electromagnetic pickup, so that said adjusting means alters a tone color output from the electric stringed instrument by causing induced electromotive forces to be produced in said string signal detecting coil by magnetic flux produced by said adjusting means.

An electric stringed instrument as set forth in claim 1 or 3 wherein said electromagnetic force producing means is an electromagnetic driver for sustaining the vibration of a string.