I have a pair of Monitor II. Not the IIA. I am new to this whole vintage speaker thing and am finding out it is kind of hard to find information about these. I really want to get them up and running again because the little that I do know is that they are excellent speakers. I need to know what kind of mid range speakers they use. I need a replacement for one of them. I have found replacement tweeters and also need a pair of the Walsh tweeters. Any information would help greatly. Thanks!