Korg SH-CS100 Sledgehammer Guitar Tuner Black

The Korg SH-CS100 Sledgehammer belongs to Korg's Custom Shop series, a line focused on delivering professional-grade precision in familiar form factors. Where many clip-on tuners offer accuracy in the range of ±1 cent, the Sledgehammer narrows that to ±0.1 cents, making it one of the most precise clip-on tuners available. For guitarists who use alternate tunings, play in ensemble settings, or simply demand that their instrument be as perfectly in tune as possible, this level of accuracy provides a noticeable difference in intonation quality.

The practical design complements the precision. Running on a single AAA battery for approximately 100 hours, the Sledgehammer outlasts many competitors that rely on smaller coin-cell batteries. Its clip-on attachment reads pitch through headstock vibration rather than a microphone, allowing it to function accurately in noisy rehearsal rooms, loud stages, and outdoor settings where ambient sound would confuse mic-based tuners. The compact black housing keeps a low profile on the headstock, staying out of the performer's sightline and the audience's view.