Korg's GA-2 is a compact tuner made only for guitar and bass, with a large readout for the note and string you are on. Choose the mode for your instrument and pitch detection happens automatically. Good for a gig bag or a practice room.
Modes for guitar and for bass
Guitar mode reaches down to a seventh string at B and up to the top E. For bass, coverage runs from a low B to a high C, so extended-range instruments are catered for. A high-sensitivity microphone sits inside, which means an acoustic guitar can be tuned without plugging anything in at all.
Flat tuning for heavier styles
Quinta Flat mode drops the reference in semitone steps, as far as five semitones below standard pitch. Downtuned metal is the target. Coverage stretches to super-long-scale guitars built five frets longer than usual. Alongside that, calibration adjusts from 430 to 450 Hz, with the value shown inside the meter as you work.
Tune by ear as well
If you would rather tune by ear, Sound Out mode plays a reference note over the built-in speaker, stepping through each open string in turn. Work against that pitch rather than watching the needle. Detection lands within one cent. The emitted tone is accurate to 1.5 cents.
Power and what comes with it
Two AAA cells run the tuner for roughly 200 hours in meter mode on alkalines, or about half that on zinc-carbon. Korg supplies a CM-200 contact microphone for clamping onto the instrument when the room is loud. The body measures 100 x 60 x 16 mm and weighs 67 g with batteries fitted.
See it in action
Specifications
| Scale | 12 note equal temperament |
|---|---|
| Detection Range | B0 bbbbb (23.12Hz) - B6 (1975.53Hz): Guitar/Bass Tone |
| Reference Tone | [GUITAR] 7B -> 6E -> 5A -> 4D -> 3G -> 2B -> 1E [BASS] LB -> 4E -> 3A -> 2D -> 1G -> HC (Pitch is 1 octave higher for GUITAR, 2 octaves higher for BASS) |
| Tuning Modes | Meter mode, Sound Out mode |
| Flat Tuning | 1-5 semitones (semitone steps) |
| Detection Accuracy | +/- 1 cent |
| Sound Accuracy | +/- 1.5 cent |
| Connectors | INPUT jack (1/4” monaural phone jack) |
| Power Supply | Two AAA batteries (3V) |
| Battery Life | Approximately 200 hours (alkaline batteries, Meter mode, A4 continuous input) Approximately 100 hours (zinc-carbon batteries, Meter mode, A4 continuous input) |
| Dimensions (W x D x H) | 100 x 60 x 16 mm / 3.94” x 2.36” x 0.63” |
| Weight | 67 g / 2.36 oz. (including batteries) |
| Accessories | Contact Microphone CM-200 |
Specifications from Korg. Appearance and specifications are subject to change without notice.
