I just bought a 55 series II that someone had put an after market radio in the glove box but it didn't have any speakers attached to it. I just finished building a speaker box that fits under the seat. If I remember I'll post some pictures of it. I had a hard time finding 4 inch speakers with cover plates. The finished product looks look and it is easy to remove. I went to Radio Shack and bought a four clip spring connector for the speaker wires.
