Knobs by Fender. From potentiometers to select capacitors, tube sockets and more, these electronics are created to closely replicate original-era Fender parts and have been used on a number of Fender reissue instruments and amplifiers, including their American Vintage series of guitars and basses. But best of all, Pure Vintage guitar and amp electronics are also versatile enough to fit most Fender guitars and tube amplifiers, making it easier than ever to inject that vintage vibe into any setup.