I am attempting to clean up a set of old JB Lansing speakers I have and upon opening them I discovered that the 175s are different. They do sound the same in mono so Im just not sure I should be worried about it or not. If the difference is only the color I can live with that, If there is a difference in the drivers themselves I guess I should hunt up another. I just dont know if there is any differences I should be concerned with. One has its info on a plate the other has its info on a sticker. Serial numbers are for the black one 22988 (on a plate) and for the silver one N-50674 (on a paper sticker)???