I'll keep this short. As a pair of bluetooth on-ears without noise-cancelling turned on, they sound quite excellent and the ambient sound is noticeably lowered. The bass is certainly boosted, but not excessively so. Mids are not intrusive but clear, and the treble is good and crisp (to my ears anyway).   Turning on the noise cancelling definitely cuts out a significant layer of outside noise, but at the cost of shedding some bass and slightly thinning out the overall sound. However, you hardly notice it once you've had them on for a few minutes...

To quickly set the scene, I've never really spent much on iem's of any nature until recently, and still probably only have one high-end pair to speak of (Sennheiser ie8's), but part of my recent quest for in-ears has been split between commuting and exercising. And it is this second area that brought me to trying out the Plantronics Backbeat Go 2's.   These in-ears are part of my long hunt for the perfect pair of iem's to accompany me only my daily morning ride (roughly 18 miles). And because I ride when listening to music, I am always cursing wind...