am i right in thinking that the front speakers in the zed are 6.5 inch round and the rear speakers are 6 inch by 4 inch ovel i dont know what system was in my zed in the first place cos when i bought it had a kenwood head unit in my back speakers are nacked and probably the stock speakers dont know what the stocke speaker rating is but the kenwood one that is in is 35 watts times 4

hello there todger the rears are a little bigger than 6*4 as i brought a set of these and they nearly fall through existing hole, beware measure the size of the speaker not the casing it is in. they are more closer to a 7*5 inch which jbl do much nicer fit.