excellent product. yes, hiss is present with xm broadcasting but it seems secondary to receiver and xm signal itself, since it doesn't occur with the ipod attached to AUX. most importantly IT IS NOT BAD AT ALL.the Delphi boombox is very versatile product with superb built-in antenna that picks up signal so you can almost walk around the house with live xm, and batteries of course. plenty and sometimes too much bass for the unit of this category, very nice sound, not Bose but very good. Have fun, i am thinking of getting another one.