I have been given a set of C52 speakers from 1962. they have not been used but one of the speakers has a SE 402 amp in it. I am not sure if it is rare or what to do with it. if someone could give me an idea of what it is, how to hook it up or what it is worth. the speakers in both cabinets are le10b low \, LE+H91+L92 with LX6 network. like i said they are new out of the box.