We used to drive or fly to Indy at least once a year from South Dakota. We always felt the RCA Dome was much louder. Also, since the 70's, we would drive to KC whenever the Colts played the Chiefs. It is beyond belief how loud Arrowhead was even with the stadium half full when the Chiefs were crappy. In the early 90's, I went to a Monday night game between the Chiefs and Raiders. The Chiefs made a great comeback and won the game with a TD pass in the final seconds. That place was so loud it actually hurt. Arrowhead was literally vibrating that made me think of the 'Walls of Jericho'.