The Dead Ringer does precisely what it was designed to do or at least it is very effective in eliminating the sustain without other guitar modifications. I tried it on my 12 string for fun and have kept it on a nylon string that gives a wonderfully round plucked sound then "dead" and works well for that intimate tone.
I've played extensively on a rubber bridge guitar made by the Old Style Guitar Shop in LA, and was certainly skeptical about this little Dead Ringer product. I'm honestly blown away by it and truly love it. I prefer the feel of my acoustic guitar, so to be able to transform it into a rubber bridge in 2 seconds is incredible. Sounds exactly the same to my ears.
My wife and I co-produce indie-acoustic tracks occasionally and the Dead Ringer has been an inspiring addition to our creative repertoire! I would highly recommend this to any singer-songwriter looking to add another “pocket trick” to their acoustic playing!
So amazing! Works on any guitar from my LG-2 to an OM28. Allows me to focus on songwriting a lot more effectively. Love it.