Compact tuner designed specifically for guitar and bass

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New feature-packed models join the best-selling GA series of compact tuners. With superior features like a large, easy-to-see, LCD needle-style display, the GA-40 Guitar/Bass Tuner is a great value!

A compact tuner designed specifically for guitar and bass, with excellent performance and convenient functionality.

Dedicated guitar and bass tuner with large LCD for easy viewing

The GA-40 is a dedicated, easy-to-operate guitar/bass tuner with automatic pitch detection. In Guitar mode it supports seven-string guitars (7B through 1E), and in Bass mode it supports six-string basses (Low-B and Hi-C). With the precision you expect from KORG, the GA-40 indicates the pitch quickly and accurately. The LCD needle-style display provides both the accuracy of an LCD as well as the easy viewing of a needle indicator, and the display has been enlarged for even better visibility. You can also use the built-in high-sensitivity microphone to tune an acoustic guitar.

Conveniently thin and compact

The GA-40 gives you convenient guitar and bass tuning functionality in a pocket-sized package, making it easy to tune whether you're on stage or in the studio. An output jack (bypass) has been added, making it easy to check the tuning even while you're performing. The stand on the back lets you place the tuner on any surface.

Key Features

Scale12-note equal temperament
Detection Range[GUITAR]B1 bbbbb (46.249 Hz) – B6 (1975.54 Hz), [BASS]B0 bbbbb (23.12 Hz) – B5 (987.77 Hz)
Reference Tone[GUITAR]7B?6E?5A?4D?3G?2B?1E
[BASS]LB(Low B) ?4E?3A?2D?1G?HC(High C)
Tuning ModesMeter mode (AUTO), Sound Out mode (MANUAL)
Flat TuningSemitone steps of 1 semitone (b) 5semitones (bbbbb)
Detection Accuracy±1 cents or better
Tone Accuracy±1.5 cents or better
Connectors:INPUT jack (1/4” monaural phone jack), OUTPUT jack (1/4” monaural phone jack)
SpeakerDynamic speaker (28 mm diameter)
Power SupplyTwo AAA batteries (3V)
Battery Lifeapproximately 85 hours (Meter mode, continuous A4 input, zinc-carbon batteries)
Dimensions (W x D x H)100 x 67 x 17 mm / 3.94” x 2.64” x 0.67”
Weight88 g / 0.19 lbs. (with batteries)
AccessoriesTwo AAA batteries for verifying operation
Korg GA40 Guitar & Bass Tuner
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