KLOS Jazz 4 20 Fret Neck

The KLŌS Carbon Fiber Bass Neck J4 is a modern upgrade for players seeking maximum stability, consistency, and performance from a traditional J-style 4-string bass. Constructed from advanced carbon fiber, this neck resists warping, temperature shifts, and humidity changes—keeping your instrument in tune and feeling the same night after night.

With its lightweight design and smooth, fast-playing feel, the J4 neck enhances balance, sustain, and overall responsiveness without sacrificing familiar ergonomics. Ideal for touring musicians, studio players, and anyone looking to modernize a classic bass, the KLŌS J4 carbon fiber neck delivers reliable performance with minimal maintenance and a clean, contemporary aesthetic.