This Toshiba TA7630P chip-based preamplifier module, very easy to implement, will troubleshoot and replace a faulty headphone output. It can also be used as the basis for the development of a complete and affordable preamplifier / headphone amplifier, including volume control, bass and treble control, as well as an L/R balance. Its potentiometers have standard 6mm notched axes, a wide choice of buttons and cases are available to you. The preamplification section integrates an AOP 5532 mounted on DIP8 and therefore interchangeable.