The meaning of the acronym DUM stands for “Distinctly-Un-Magical cables”, i.e. cables without magic and gimmicks, of course. The MrSpeakers DUM 3.5 mm dual input cable uses no magic copper crystals or pixie dust insulators. The MrSpeakers DUM cable is a 0.51mm OFHC cable. (per conductor) designed in collaboration with an engineer who has forgotten more about cables than we will probably ever know; MrSpeakers shared with him what they needed, went through literally MANY iterations with the brand to dial in the sound they needed, and, finally, they got DUM, handmade in the USA.
To MrSpeaker ears, what sets the MrSpeakers Cable DUM apart from their standard cable is a fuller, cleaner, more detailed sound with a deeper soundstage and a very organic upper register. Since November 2015, they have improved the flexibility of the cable so it now has a nice, relaxed drape and the microphonics are considerably reduced. If you’re not sure (or don’t believe) whether a cable can really make a difference, try the DUM cables for yourself with your headphone compare with and without, you’ll hear the difference from the first bit.
MrSpeakers Compatibility 3.5mm / 6.35mm or XLR DUM cable: