Top positive review
stealthy, fast and easy to read
Reviewed in the United States on February 11, 2018
I bought the D'Addario NS Micro Sound Hole Tuner, hoping sound hole placement would be both convenient and stealthy. The tuner display and functions are similar to the NS Clip-on but with a clip optimized for sound holes. Like the headstock clip-on variant, you can leave it installed without worrying about it falling off or breaking.
It’s powered by an exposed button cell so try not to sweat or spill beer on it! The NS seems delicate but is unlikely to suffer trauma since it’s inside the guitar. Installation is easy: simply side the clip onto the edge of the sound hole. Line it up carefully as it’s probably tough getting it out of the guitar should it fall in! Its easy to turn on with a left hand finger and easier to see than a headstock tuner. I also tried to install it in my tenor ukulele and that wasn't a good idea. After great struggle I got it mounted but then the sound hole is so small it was almost impossible to hit the on/off button with my finger. So out it came.
Clipped on a Jose Ramirez classical guitar, I found it more responsive than the NS headstock Clip-on. However, I was getting misreads from the A-string: E instead of A. When I stopped the A-string from ringing, the NS displayed the ringing E harmonic from the low E! When I used my palm to mute the other open strings, there were no misreads. So apparently the NS is really sensitive as ringing harmonics set it off. No biggie once I found the workaround.
All in all I loved the stealth and convenience of this small tuner. And the sound hole LCD is the most natural and easy to read place for a tuner.