Korg CA-40 Review

korg ca-40 01

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When we look at electronic tuners, Korg is always out-shined other makers as a reliable brand. This tuner maker always produces excellent models and become top fan choice of all musicians, bands and guitar players. Among their product line, Korg CA-40 is one of the best-selling models. It is a compact design and high performance gadget for all.


Unlike previous models from Korg, the CA-40 is more user-friendly and it comes with bigger display. The larger screen and high-precision LCD needle-style give great visibility to the user. With wide detection range from A0 – C8 and calibration function, Korg CA-40 is ideal for use with brass band or orchestra. This tuner is simply an easy-to-use gadget for the beginners and the pros.


A new user may encounter difficulty when first operate their new Korg CA-40. If you are one of those first timers on electronic tuner, there may be time when you did not get the gadget operate properly. No matter how you pluck or strum the strings of you instrument, your new tuner just doesn’t seems to read the note as quickly as you expected.

korg ca-40 chromatic tunerFirst thing first, you should try to get the sound hole of your string instrument as close as possible to the microphone.

Also, you have to ensure that you are in a quiet environment, as extra noises will drive your new Korg CA-40 crazy. If you are unable to find a complete quiet place, that’s okay. Just get yourself a Korg CM-100L Clip On Contact Microphone and clip it onto the headstock of your instrument. It works great for tuning in a noisy environment.

Another reason why your new Korg CA-40 did not seems to get the reading easily may be is because the strings of your instruments are old and rusty. Dead strings will always makes the tuner have more difficult time “hearing” them.

Batteries charge might also be the reason why you are getting very little response from your new tuner. When the charge is low, your tuner will tend to picks up poorly. So instead of buying another new tuner, try new batteries and make sure they are oriented correctly might give a big help. Read more user reviews.


  • Scale: 12-note equal temperament
  • Detection Range: A0 (27.50 Hz) – C8 (4186.01 Hz): for a sine wave
  • Reference Tone: C4 (261.63 Hz) – C5 (523.25 Hz): 1 octave
  • Tuning Modes: Meter mode (AUTO), Sound Out mode (MANUAL)
  • Calibration Range: A4=410 Hz – 480 Hz (1 Hz steps)
  • Accuracy:
  • Detection: +/- 1 cents or better
  • Tone: +/- 1.5 cents or better
  • Connectors: INPUT jack (1/4” monaural phone jack)
  • Speaker: Dynamic speaker (28 mm diameter)
  • Power Supply: Two AAA batteries (3V)
  • Dimensions: 3.94”(W) x 2.64” (D) x 0.67” (H)/100 (W) x 67 (D) x 17 (H) mm
  • Weight: 0.19 lbs. (88 g) (Including batteries)




  • Simple to use
  • Very responsive and accurate
  • Perfect size


  • No backlight and auto power off


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