I'm embarking on the title's install, have the shell and walkway off and a dedoder with 8 pin plug for it. Not too many handy places to put speaker/s though. (DCC ready model). Just replaced the OEM speakers on 2 Athearn SD40's with the Athearn spec Tsunamis with iPhone4s speakers and enclosures. Got rid of the horrible scratchy, tinny sound the stock ones have. At least the Kato doesn't have all those dangly wires Athearn uses.