Korg GA40 Custom Tuner

Chromatic Tuner With a Compact & Easy-to-Handle Housing!
  • 3D meter display for a revolutionary readout
  • Accurate to ±0.1 Cent
  • Three meter display modes
  • Compact, flat design with a large screen, extremely travel-friendly
  • Includes a high-quality microphone for tuning acoustic instruments
-37% 39
instead of RRP**62
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Standard Shipping
free
Delivery time 1 - 2 working days
Priority Shipping
+ 0,99
Shipping on 20.05.2026
Express Shipping
+ 5,90
Delivery on Thursday, 21.05.2026, if you order within  14 Hrs. 43 Min. 
Shipping and Delivery

Compact Tuner With an Astonishing Accuracy of ±0.1 Cent!

KORG's compact pocket-sized tuners have been a best-seller for many years. Who doesn't know the GA series for guitar/bass or the CA series for other instruments, especially since they're used by beginners and professionals alike? Now there's another model: the GA Custom.

The GA Custom features a 3D meter display you won't find on any other compact tuner. Used together with several display modes, this approach ensures optimal legibility. The exemplary accuracy of ±0.1 Cent will impress even professionals. The flat enclosure with a rubberized protective layer is even more compact than previous models. The built-in, highly sensitive microphone makes this tuner suitable not only for guitar and bass but also for acoustic instruments of all kinds. With the GA Custom you get a compact tuner packed with practical features.

3D Meter Display for a Revolutionary Readout

The Custom Shop series sets new visual standards with its 3D meter display. The remarkably large note name and the intuitive movement of the bright LEDs allow quick tuning. This 3D representation lets you tune any instrument to ±0.1 Cent accuracy.

Accurate to ±0.1 Cent

The GA Custom from KORG was developed specifically for professional users and offers an unprecedented accuracy of ±0.1 Cent for compact tuners. Musicians of all kinds can now enjoy the same tuning precision as KORG's flagship tuner, the Pitchblack Pro.

Three Meter Display Modes

There are three display modes to choose from: "Regular", "Strobe" and "Half Strobe". Selecting these modes is straightforward. In Strobe and Half Strobe modes the GA Custom's precision can be used to the fullest—even slight impurities are detected.

Compact Enclosure

Although the meter display has become larger and more readable, we still managed to make the enclosure even more compact. The flat housing is not only travel-friendly but also provides clear visual relations. Thanks to the rubber coating the tuner always sits securely in your hand.

Highly Sensitive Microphone

Besides input and output jacks for electric guitar and bass, this tuner contains a sensitive microphone for tuning acoustic guitars, wind and string instruments as well as pianos, harpsichords, etc. If desired, you can also use the optional CM-200 contact microphone.

Perfectly legible, super-accurate and delightfully handy!

Features

  • "Custom Shop" — perfect quality all around
  • 3D meter display for a revolutionary readout
  • Accurate to ±0.1 Cent
  • Three meter display modes
  • Compact enclosure
  • Highly sensitive microphone

Technical Specifications

  • Tuning: 12 notes, equal temperament
  • Detection range: A0 (27.50 Hz) ~ C8 (4186 Hz)
  • A4 reference frequency: 436 ~ 445 Hz (in 1 Hz steps)
  • Detection accuracy: accurate to ±0.1 Cent
  • Input impedance: 1 MΩ (with active tuning function)
  • Connections: Input (6.35 mm jack, mono), Bypass (6.35 mm jack, mono)
  • Power supply: 2 x AAA battery
  • Battery life: approx. 40 hours (constant A4 input, active tuning function)
  • Display mode: regular, with 2 x AAA zinc-carbon battery
  • Dimensions (W x D x H): 99 x 65 x 16 mm (incl. rubber foot)
  • Weight: 83 g (with battery)

Scope of delivery

  • 1 x Korg GA Custom Tuner, black
  • 2 x AAA battery

Specification

  • Product number 00041938
  • Colour Black

Reviews

5.0/5.0
Based On 1 ratings
5 Stars
1
4 Stars
0
3 Stars
0
2 Stars
0
1 Star
0

A verification of the ratings has taken place as follows: Only customers who are registered in our online store and have actually purchased the product from us can submit a rating for the item in the customer account.

Very good device
Review from Leila on 19.02.2020
This rating has been translated automatically. Original language flag from
 verified purchase
The tuner works very well and is very easy to use.

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