Review on 🎧 DUKABEL TopSeries Long 6.35mm to 3.5mm Headphone Jack Adapter - Extended 8ft Cable for Mixer, Guitar, Piano, Amplifier, Speaker by Donna Jones

I was surprised that when plugged into various devices, the plug does not fully insert into some sockets, as if the diameter is small enough to prevent plugging depending on the device. I concluded that the manufacturing tolerance was violated and stopped using it. Some time later I came back to this issue with the intention of making a decision to reject or repair. Upon closer inspection, it turned out that the narrower insulating ring between the ring conductor (center conductor) and the sleeve was to blame - it protruded a little, just enough to cause a problem. Using a sharp knife, I was able to easily scrape off the excess plastic and fix the problem. I suppose if you were persistent enough this extra material would eventually wear out with repeated use, but I didn't want to risk damaging the jack in the process. A minor inconvenience, but easily resolved.