This product review is for the July 2024 release of Walthers Proto GP9 in the phase III variation. They offered two road numbers in the Illinois Central orange and white paint. These are factory installed DCC/sound. I did upgrade to a Scale Sound Systems speaker and did a demonstration of the speaker upgrade compared to the factory speaker. Enjoy!

Links to prototype photos used in video:

9305: http://www.rrpicturearchives.net/show...
9360: http://www.rrpicturearchives.net/show...
9356: http://www.rrpicturearchives.net/show...
9350: http://www.rrpicturearchives.net/show...