DUM stands for Distinctly-un-magical cables. MrSpeakers DUM cable dual-entry 2.5mm balanced uses no magic copper crystals or pixie dust insulators, and is hand-made in the USA. MrSpeakers DUM cable is a 24-guage (per conductor) OFHC cable designed in collaboration with a guy who’s forgotten more about cables than they will likely ever know; MrSpeakers told him what they needed, he went through a LOT of iterations with them to dial the sound in, and they got DUM. And it was good to be DUM.
To MrSpeaker’s ears what sets MrSpeakers DUM cables apart from their stock cable is a fuller, cleaner and more detailed sound with a deeper soundstage and a very organic upper register. As of November 2015, they have improved the cable’s flexibility so it now has a nice relaxed drape and microphonics are greatly reduced. If you’re not sure (or negative) about whether a cable can actually make a difference, check some DUM cables out at a meet and compare to stock, it’s pretty easy to hear the difference.