No residue! Its fantastic stuff. Pliable and stretchy, sticks with almost no pressure. Yet even after clamping for a long time it can be peeled away with no residue. There's a carbon fiber washer around the spindle of my turntable, the record clamp squeezes the record down onto that hard enough to bend the record down onto the platter. Its a fair amount of force, and clamped down like that a lot. But when I wanted to peel it off to replace it came right off.
Not that you would ever want to remove it. Only if you wanted to keep the tape when you sell the speakers. Which you probably could do. I've peeled some off, stuck it back on the non-stick backing paper it comes on, and then used it again later. Whatever adhesive they use is darn near magic. But two sheets is only about $40, expensive in the world of tape but a bargain in the world of audio tweaks. One inch on a tone arm and you will hear it. One sheet on your speakers and you will swear you have a new pair of speakers!
The only real drawbacks are it doesn't do much if anything to improve bass response, and it comes out of one small company in Japan and takes a couple weeks. But it removes so much detail smearing grunge you won't believe it.
