A method and apparatus are disclosed for distributing multiple signals having audio andor video components for processing by an audio andor video processor, including a chassis having a midplane connection and number of slots for receiving plural circuit boards, where at least one of the circuit boards receives a combination of multiple audio andor video signals via a common slot of the midplane. The shield includes first magnets each having a magnetic pole of a first polarity facing the shield holding portion, and second magnets each having a magnetic pole of a second polarity facing the shield holding portion. The plate is suitable for being deformed while the collar is being tightened onto the article so as to present curvature that matches the curvature of the belt.