Ernie Ball Acoustic Guitar Soundhole Cover 4 inch (P09618)

Great sound hole cover. Works very well. Perfect fit.

Fits my guitar perfectly. Not sure what else there is to say about it.

Installed on a Fender CC-60SCE. It's a super snug fit and I felt like I had to use more pressure than I would like. Working around the rim pressing it in bit by bit, it fits. Up side is it's not moving, falling out, rattling.... Being mainly an electric player I'm not qualified to critically judge acoustic sound. But to my heathen ear it doesn't effect it too much. I notice a slight drop in treble volume but no bass loss. Plugged into an amp, I'd call the sound "fuller" with a reduction in hum/ring. (Note the CC-60SCE has a powered pickup and pre-amp)

Quality rubber soundhole cover that fit my Yamaha acoustic perfectly.

I tried the D’Addario version of this and it was just a little too tight for the Taylor. It fit but I had to force it in more than I was comfortable with. This piece drops in with just enough resistance to hold it in place. Easily removed also.

Use it everyday for my 12 string.not only does it work great but it looks nice as well.

This fit my Martin DC-16RGTE, which measures exactly 4” sound hole, perfectly. It reduced feedback from internal microphone tremendously.

Ernie Ball needs to list product dimensions; it's pretty clear that 'one size fits all' is a little ambitious for a non-adjustable product considering the variety of sound hole sizes and shapes across different types of guitars. The functional part of the cover, the part that inserts into the sound hole, is about 3 and 7/8" in diameter. It's likely not compatible with most sound hole pickups, either, without some modification. It's a perfect fit on my older Martin DX1. I was hoping it would also mute my guitar a little bit for sake of keeping things quiet during practice, though that's not the intended use. At the very least it might keep the odd pick from falling into my guitar. That said, if you're looking to use it for feedback control, this barely altered the volume or tonality of my instrument. Certainly a little less bright that it was, but if you're using a piezo pickup under your bridge the tonality of your guitar as it sounds in the room is already fairly altered to start. As far as make and materials: really well made and much more rigid than I was expecting. The outer layers feel like some kind of soft silicone and shouldn't cause any damage. What sits inside the sound hole and insulates the instrument from amplified monitor/PA/stage audio feels like it has a denser rubber underneath that outer layer. List a diameter on the package/listing and you have a 5-star product. Pretty silly not to.

サウンドホールが8.6cmのクラッシックギター用に買いました。 ピックアップをつけてヘッドホンで聴くときに生音が聞こえないようにしようと思いました。 音は思ったほど小さくなりませんでしたがヘッドホンで生音が邪魔にならないくらいにはなりました。

S'adapte parfaitement sur une Takamine EG523SC. Réduit effectivement les larsens de l'ampli, sans pour autant les supprimer complètement lorsqu'on joue proche de l'ampli (forcément).

Trodde att den här skulle dämpa resonansen lite från gitarren som i övrigt har överskott av den. Istället tar den bort all dynamik. Kvar är inte mycket. Kanske bara inte är van.

A bit pricey, but the quality is next level. Really good, robust and solid hole cover.

This acoustic soundhole cover is perfect! fits my Epiphone DR-100 with ease. Helps me be able to play indoors much easier without disturbing the whole household. Mind you it doesn’t mute the guitar as a whole but rather keeps all the sound frequencies trapped inside the body of the acoustic 10/10 would recommend to anyone who is interested. (Ps. Measure your acoustic sound hole before ordering)