The 4-string bass guitar has been the standard for bassists since Leo Fender introduced the Precision Bass in the 1950s, revolutionizing rhythm sections in rock, jazz, and funk. With tuning similar to an upright bass (E-A-D-G), it provides a strong foundation for most musical genres. Major manufacturers like Fender, Music Man, Ibanez, and Yamaha offer iconic models such as the Fender Precision Bass, Music Man StingRay, Ibanez SR Series, and Yamaha BB Series. These instruments are widely used in all settings, from live performances to studio recordings, offering deep, punchy tones that lock in with drums for groove and stability.