I haven't been seriously into hi fi since the 70's and have a Luxman amp with separate tp 114 pre amp tuner combo and old Klipsch speakers. Is there a way to add a digital signal receiver to play music other than LP's CD's and radio? I tried a cable that went from rca jacks to a newer tablet and it was terrible. Is there anything that sounds good or at least as good as earbuds through the tablet?