at work this week we have ben shutdown for mantience but i went in to do mantince. on monday they had this sad excuse for a boom box in the huge aquatics center you could not heat it more than 20 feet away. so i took in my r 10 and my samson am and a cd player. i know i dont have a preamp but it worked. and boy can the r 10 play even rap music. i bet if you want to make a ht out of r 10 they would be perty good these were the best free speakers i ever got.