I just get this system and the sound quality really be great , especially for the price . its one of the few system in this price range to have digital optical input , which be necessary if you be connect certain component for dolby digital suround like a x-box . although there be a setting call `` Prologic '' , I be not sure that it actually have a prologic decoder since the manual only say that it give out prologic sound if hook up to a prologic receiver . I be only give it four rather than five star because I have notice that sometimes it will read no disc when there be a disc there so it have to be eject and restart . otherwise , its really a nice system . Update - 11\/29\/04 - my system die like many other reviewer . ca not recommend for that reason .