hello,my name is alan.i am new in here,and wanna know if anyone can help me with this problem.that is i plan to uses my old 2 stereo hi-fi speaker(sony-type bookself) with my home theater system 5.1(also sony),the problem is can i use the 6 ohm stereo speaker to join it with the home theater system amp only 4 ohm?can it be suitable to or x?