when it come to personal listening , my trusty  shure se535-v  although the sound quality be generally good , wireless headphone still have a way to go before they could be stamp as `` audiophile '' quality . that say , the audio quality be definitely good enough to easily discern whether or not a select track be encode in a lossless format versus a high-bitrate mp3 , use a iPhone as a source . I have to say , that impressed I . similarly , I be surprise to discover just how much bass these produce . be it tight and accurate ? well ... let 's just say `` it be there , and I doubt all but the snobbiest customer would be bother by it '' . touch back on discernible audio quality , the audio source really matter a lot when it come to get the best sound from these . move from the iPhone to a Yamaha receiver , the difference between DirecTV HD and sd broadcast , a Blu-Ray disc , a CD , and streaming video from Amazon Prime -lrb- via the Blu-Ray player -rrb- be all quite stark . where most source range from `` great '' to `` acceptable '' , the streaming video be touch `` awful '' . definitely consider what you be go to be listen to the most , before buy these . in term of design , I can not say I be really overwhelm here . the build quality seem okay , though I be concern about snap one of the speaker off just remove it from the packaging . the headphone be reasonably comfortable , though TDK choose to have the require two AAA battery in the same speaker , which result in minor -lrb- but noticeable -rrb- heaviness on one side . the transmitter , however , do not seem build all too well . it 'll hold up if you baby it , but I be not sure how it will stand up to live in a road warrior 's suitcase or laptop bag . as with the headphone , it require two aa 's as well . the wireless performance for I be `` acceptable '' if not slightly annoy at time . these headphone perform well in a open space , but add a wall , and I notice that the headphone be cut out at 12 foot or less . all thing be equal , if I have purchase these headphone at this price without the wireless feature , I can not say I would feel rip off . if TDK make they a bit more balanced physically , and clean up the midrange a bit , they would be close to perfect .