14 Gauge wire is some no name crap, (CCA) I got on ebay. At least 1.5x thicker than my 12 gauge I just got from Monoprice.
My Monster 12 gauge is also thicker than the Monoprice 12 gauge.
Does it have something to do with car speaker wire vs home speaker wire? The Monster is designed for car subwoofer's and I think the 14 gauge was meant for car's as well.