I think he might be right. I have one as well. It's right under the rear deck lid.brooklyn legend said:I was looking at my friends 1991 Acura Legend 4Door LS and I noticed that he had some black box (has ridges like an amp)held down in brackets. What is this thing he has no idea and nor do I. He thinks it has something to do with the built in phone that came with the car does it?
And my car did have the phone system.