KORG GA-2 - Guitar and Bass Tuner with Large Display, Dedicated Modes, and 200 Hours of Battery Life

KORG GA-2 - Guitar and Bass Tuner with Large Display, Dedicated Modes, and 200 Hours of Battery Life

The KORG GA-2 is a pocket-sized tuner specifically designed for guitar and bass , featuring a large display that clearly shows note names and string numbers . It features dedicated modes for guitar (including 7-string guitars, 7B–1E ) and bass (up to 6-string, Low-B–Hi-C ), plus Quinta Flat tuning from 1 to 5 semitones for lower settings. Calibration is adjustable from 430–450 Hz , and there is a Sound Out mode that outputs a reference tone from the built-in speaker (range C4–C5 ) for tuning by ear. Thanks to the built-in high-sensitivity microphone and 1/4" input , it works with both acoustic and pickup-equipped instruments.

With an accuracy of ±1 cent in measurement (±1.5 cent in Sound Out ), up to 200 hours of battery life on alkaline batteries, and a slim form factor (100 × 60 × 16 mm; 67 g with batteries), the GA-2 offers classic KORG reliability for practice, studio, or live performance. It includes two AAA test batteries and is compatible with the optional KORG CM-200 contact microphone. Green/red LEDs help visualize tuning deviation at a glance.

Main features

• Dedicated modes for guitar (7 strings) and bass (6 strings) with automatic string detection.
• Display with needle-type meter and LED guides; enlarged note/string area for improved readability.
• Quinta Flat : 1–5 semitones flat tuning for low/wide tunings.
• Calibration visible on screen: 430–450 Hz (1 Hz).
• Sound Out mode with integrated speaker (references C4–C5 ); built-in microphone for acoustics.
• Connectivity : INPUT 1/4” mono for instruments with pickup.
• Measurement accuracy ±1 cent (±1.5 cent at reference tone).
• Battery life approx. 200 h with 2 × AAA alkaline batteries (≈100 h with zinc-carbon).
• Compact design : 100 × 60 × 16 mm; 67 g with batteries.

Product benefits

• Immediate and confusion-free reading thanks to the enlarged note and string area and help LEDs.
• Real versatility : it works via microphone , via jack input and also emits a tone for tuning by ear.
• Prepared for low tunings : Flat Fifth up to 5 semitones for modern styles and long scales.
• Fewer battery changes : up to 200 hours of continuous use with alkaline batteries.
• Portable and durable to always carry in the case without taking up space.

Use cases

• Rehearsal and live : Quick tuning changes between tracks; confirmed with LEDs and a needle meter.
• Studio : Use Sound Out (C4–C5) to check by ear and align double takes.
• Classes : guitar/bass mode with chord indication designed for beginners and advanced players.

Frequently Asked Questions

• Is it chromatic? It's optimized for guitar and bass with dedicated modes and flat tuning from 1 to 5 semitones.
• Can I tune acoustics wirelessly? Yes, it comes with a built-in microphone ; you can also use the 1/4" input.
• Are batteries included? Yes, 2 x AAA batteries are supplied.
• What is the accuracy? ±1 cent for measurement; ±1.5 cent for Sound Out pitch.

Description for projects

Pocket guitar/bass tuner with needle-type meter; Guitar/Bass modes (7-string guitar, 6-string bass); Fifth Flat 1–5 semitones ; calibration 430–450 Hz (1 Hz); Sound Out mode (reference C4–C5 ) via speaker; built-in microphone ; 1/4” mono input ; accuracy ±1 cent (measuring) / ±1.5 cent (Sound Out); battery life approx. 200 h (alkaline) / 100 h (zinc-carbon); power supply 2 × AAA ; dimensions 100 × 60 × 16 mm ; weight 67 g (incl. batteries); includes 2 × AAA test batteries ; optional accessory: KORG CM-200 contact microphone .