PSK is a guitar effects pedal brand produced by South Korean manufacturer Kyung Nam Co. during the 1980s and early 1990s. The pedals were largely modeled after popular Boss circuits of the era, with model numbers and enclosures that mirrored their Japanese counterparts — for example the DS-1 distortion, the CR-1 analog chorus (a CE-2-style design), and the FG-1 flanger.

The lineup spanned distortion, chorus, flanger, phaser, wah, volume, and other common effect categories, with notable models including the SMT-2 Super Metal, the CRS-3 analog chorus, the PS-1 phaser, and various overdrive units. Sold as affordable alternatives to the Japanese-built originals, PSK pedals were widely distributed in Asian and European markets but rarely seen at the time in North America.

Long out of production, PSK units circulate on the vintage market through sites like Reverb and eBay, where they are collected as low-cost Boss clones with their own character and as artifacts of Korea's 1980s effects-pedal manufacturing scene.

PSK has 4 products cataloged on Equipboard, including Wah Pedals, Overdrive Effects Pedals, and Flanger Effects Pedals.