these be phenomenally accurate can for the price . a tiny bit cold in the mid-range but spatial accuracy be just astounding for this kind of scratch - with reasonable-quality source material , you 'll hear terrific detail . they be also incredibly comfortable for long-term use - no hot ear or sore lobe . my only gripe be the bass , which be slightly overemphasize and sometimes come off as `` boomy '' depend on the recording , almost enough to start color the lower mid . I think I 'll keep these , but if you be really look for accuracy , you might want to roll off the bass a bit with equalization to get these perfectly flat . otherwise , these sound as good as can and iem cost 2-3 time as much . if you love bass and like to feel it in you head , you 'll really take to these .