so the question that hasn't been adressed here is.. are we talking consumer grade or pro grade Monster Cable?
I don't buy Monsters for my home audio stuff, cuz, well, it's not really necessary. Radio shack is SHIT though, and I wouldn't send anyone to radio shack for cables. Those cables come with a standard 60hz hum nanoinduced to the line
screw Radio Shack, and get some halfway decent cables for the same price at fucking Target.
However, I run a pro audio system, and you can hear a HUGE difference by using Monster Cable XLRs (or other high end cables) versus using the generic no-name cheap ones.
Monster started making consumer shit because they have a well deserved reputation in the professional audio field. Are there other cables around nowadays that perform as well? of course, but Monster is still among the best. Plus, if a Monster Cable ever breaks, you get a new one right on the spot. fuck yeah.