Depends on the system. If it's a component system, you need component speakers and yes the center channel is active. Did you verify the speaker exists? , the grill work is there for everyone, even low end systems, but no speaker. (you said you didn't hear it). Anyway, look in the trunk, under the matting on the sides, I believe you would have an amp back there if your system was component style. For that matter wouldn't it be infinity? Is there an emblem on the radio? No infinity, no center channel..use regular speakers.