I just buy a r 140 . after a brief familiarization with all the item in the shipping box I cnnect it to my tv . it pay to look up the tv manual for the proper audio out connection . I do not at first on my Bravio tv and just pick a red & white connection at random & consequently face silence on my ear phone . Consulting the tv manual , this be soon correct . the unit work well . I be 80 year old & have minor hearing loss . it beautifully compensate for this shortcome with very good sound quality . walk inside the house & outside for quite a distance , still good reception . I fully recommend this unit . I be very satisfied with it .