I also have a Lionel D & H Alco PA A-B-A set, with the matching Lionel aluminum passenger cars, in factory sealed boxes. It was an impulse buy. However, I have no need to run them because I run Williams D&H PA A-B-A set, with matching MTH D & H aluminum cars. The Williams set has Tru Sounds.
In retrospect, it was a mistake to buy the Lionel set, even if it was D & H.