Skip to content
Everything In Music Since 1958
Everything In Music Since 1958

KORG GACS GA Custom Chromatic Guitar Tuner

Out of Stock
Original price $39.99
Original price $39.99 - Original price $39.99
Original price $39.99
Current price $33.95
$33.95 - $33.95
Current price $33.95
About Inventory Status


Questions?
Call or text us at 301-946-8808.

In stock: It is in stock and available to ship or pickup. Apparel must be shipped from another location and is not available for in-store pickup. We can usually ship or have these items available for pickup by the next business day if they don't require inspection, special handling, or setup. Our pickup location is 11151 Veirs Mill Rd. Silver Spring, MD 20902.

📆 Preorder: It is on the way to our warehouse. We can't predict when preorder items will arrive due to current supply chain issues. If you place an order for one of these items someone will contact you to estimate the delivery date.

Out of stock: We don't currently have it available but you're not out of luck yet. We still may be able to get it. If you order one of these items we will contact you with an estimated fulfillment date. You have the option to cancel the order if you change your mind.

Special order: The item is so special that it needs to be custom ordered for you. Some of these items are works of art and have to be made individually. Orders for special order items must be prepaid and we cannot accept cancellations or refunds.

█ Sold out: We don't think we can get this item because it was either discontinued by the manufacturer or was limited in quantity. If you want or need this item call or text us. Sometimes we can help you track down the item through other sources or help you find something similar.

About Item Conditions


Questions?
Call or text us at 301-946-8808.

New: The item is brand new as received from the manufacturer with a full manufacturer warranty. Instruments such as guitars, snare drums, drum kits, brass and woodwind instruments may be opened for photography and quality control inspection and may not be in a factory sealed box.

Mint or Open Box: The item may have been opened and tested but has been repackaged. The original packaging may have superficial issues but the item itself and any originally included accessories are in perfect, like new condition.

Display Model: These items are so cool that we put them on display in our legendary shop. The condition is brand new as received from the manufacturer with manufacturer warranty. Rest assured, these items undergo a very careful inspection before shipping.

Demo: These items have been on our sales floor for demo purposes and will likely show signs of use. The original packaging may no longer be included, but you can be assured that you are receiving an awesome item and an awesome price.

Used: The item is used. These item may have varying degrees of wear. Please read the description for information about the condition of the item. Used items do not carry a warranty.

B or C Stock: Factory refurbished. These items were purchased from the manufacturer in a refurbished condition. They will show some cosmetic issues, but nothing that would impact performance. Being that these are sealed from the manufacturer, we generally do not open these to photograph the cosmetic issues. They are guaranteed to work and may have a limited warranty or you may purchase an extended warranty in some cases. Please see the listing description for item specific information.

Educational & Government Sales Quotes

Click here to inquire about an educational or government quote and discover more about our Educational & Government Sales Division.


Highly Visible And Accurate - The KORG GACS GA Custom Chromatic Guitar Tuner

Card-type compact tuners have long-been KORG’s most popular tuners. The diverse lineup includes the GA series for guitar/bass and the multi-use CA series, and has continued to support the tuning needs of beginners and professionals alike. We now introduce a new model: the GA Custom.

The GA Custom features a large 3D visual meter, the first of its kind for a compact tuner. Three-dimensional lights and versatile display modes deliver an unprecedented level of visibility. Its ultra-high ±0.1 cent tuning precision also meets professional needs. The flat body with rubberized exterior is even more compact and portable than ever. A high-sensitivity mic is built-in, allowing it to be used not only with guitar/bass but also with orchestral and acoustic instruments. The GA Custom is a new type of compact tuner that packs a ton of high-end functionality into a convenient and highly portable package.

"CUSTOM SHOP,” THE MARK OF ULTIMATE QUALITY

KORG tuners have a 40-year history that began with the world’s first needle-style tuner. While we have produced many different types of tuners, including tuners with unrivaled precision and tuners with epoch-making functionality, these products were made possible by KORG’s unwavering commitment to quality. In other words, our attitude of sincerely listening to the voice of the user, our revolutionary ideas, and our high level of technological ability are what underlie the long history of KORG tuners. 

Now, KORG announces a new lineup aimed at achieving even greater accomplishments. The name “Custom Shop” designates this tuner as a flagship model that is representative of KORG’s highest levels of technology. Its design features a beautiful meter displayed by a CMD panel, ultra-precision detection, and careful attention paid to appearance and feel. KORG’s high technological ability and commitment to quality have taken shape as the “Custom Shop” name.

3D VISUAL METER CREATES A REVOLUTIONARY VISUAL EFFECT

The 3D visual meter exemplifies the Custom Shop series. A large and easily visible note name indication and the distinct movement of brightly illuminated LEDs make the pitch difference and change instantly recognizable. This new 3D visual meter makes it simple to tune with a precision of ±0.1 cent.

ULTRA-HIGH TUNING ACCURACY OF +/- 0.1 CENTS

Designed with the professional user in mind, KORG’s GA Custom offers extremely accurate tuning with a detection range of +/- 0.1 cents, a level of precision that is uncommon of compact tuners. With the GA Custom, players of all styles can now enjoy the same ultra-high precision offered in KORG’s flagship tuner, the Pitchblack Pro.

THREE METER DISPLAY MODES

Three types of display modes are offered: Regular, Strobe, and Half Strobe. Each mode can be easily selected according to the user’s preference. Strobe and Half Strobe mode reflect the extreme precision of the GA Custom, making it more convenient to tune accurately.

COMPACT FLAT DESIGN

The meter display area has been made larger and easier to see, while the body has been made even more compact. The flat design is excellent for both visibility and portability. With a rubberized exterior, the body is also easy to hold. There’s a tilt stand on the rear, allowing you insert a pick to make the unit stand on its own.

HIGH-SENSITIVITY MIC IS BUILT-IN

In addition to the INPUT/OUTPUT jacks used when tuning an electric guitar or bass, there’s a built-in high-sensitivity mic that lets you use the unit for tuning not only acoustic guitar but also wind instruments, string ins

  • “Custom Shop,” the mark of ultimate quality
  • 3D visual meter with revolutionary visual effects
  • Ultra-high tuning accuracy of +/- 0.1 cents
  • Three meter display modes
  • Compact flat design provides a large screen and easy portability
  • High-sensitivity mic is built-in, allowing use with acoustic & orchestral instruments


  • Scale 12 note equal temperament
  • Detection Range A0 (27.50 Hz) – C8 (4186 Hz)
  • Calibration Range 436 – 445 Hz (1 Hz steps)
  • Detection Accuracy within +/- 0.1 cent
  • Input Impedance 1 MΩ (when tuner is on)
  • Connectors INPUT (mono 1/4" jack), BYPASS (mono 1/4" jack)
  • Power Supply Two AAA batteries
  • Battery Life approximately 50 hours (A4 continuous input, tuner on, display mode: Regular, using two AAA zinc-carbon batteries)
  • Dimensions (W x D x H) 99 x 65 x 16 mm/ 3.90" x 2.56" x 0.63" (including feet)
  • Weight 83g / 2.93 oz. (including battery)
  • Included items Two AAA batteries for verifying operation

Manufacturer: Korg USA
Model: GACS
SKU: I386752-N-0-WHXB
UPC: 4959112145627


We are Chuck Levin's Washington Music Center

Maryland, Virginia, and Washington DC's legendary music shop. Family-owned and operated since 1958. Buy gear the way it was meant to be bought, from a store that's been there through it all and has the vibe to prove it. We're staffed with musicians and industry experts, people that live and breathe music gear. Our mission is to help you find the right gear for your project, that thing that will bring you the most joy out of what you do. We're an authorized dealer for almost every brand, we stock items the other stores don't, so you can try before you buy. Stop by our Wheaton, MD showroom and see for yourself.

Contact us if you have questions about one of our listings or if you need help finding the right piece of gear.

Free Shipping

Offered for thousands of items when you spend $100+

Questions?

+1 (301) 946-8808

Get A Quote

Get an educational or government quote

Easy Returns

Learn about returns.