Here is what the split bracket K5 on Amtrak's Acelas and HHP8's look like. These horns sound different from a normal K5LA as this horn has the standard #3 bell instead of a 3A bell. Was this an accident due to the fact that a K3LA is seen to the right, and the two chime bracket sports a 3 and 5 bells? It could be that they forgot the two chime bracket should have a 3A bell to make it a split K5LA.