Instruct: Classify the given review as either positive or negative.
Query: great horn

I have these horns and love them. Install was easy, but time consuming. I suggest mounting them behind the grill like the other reviewer. I've had them installed for a few months. I haven't noticed them getting dirty, and I enjoy driving on dirt.The hella relay is strongly recommended. Without the relay, the horns do not get enough power and will not get to 118db. Also, if the horns are not grounded correctly (use the battery ground), they will not get to 118db.