I will have to agree with Transman regarding the PS-3 sound files.
All my previous engines were PS-2, and although the same crew sounds on each engine got tiresome after awhile, I enjoyed MTH's variety of engine sounds to fit the model.
A few months ago, I purchased my first MTH PS-3, the Southern PS4 4-6-2. I was delighted by the many improvements made on the engine and its sound files. The whistle, the chug, the steam valves popping, LEDs, pulsing firebox, etc. It was very refreshing. It is still one of my favorites (with the exception of the crew talk from the same guys, which is REALLY getting old, and the assinine train wreck sfx). But that was minor, I just skip those recordings when I can. It is a beautiful engine that I can run at 1 and 2 mph.
Because of these refreshing changes that I thought were PS-3 related, I couldn't wait to get my hands on the Heritage Series Premier ES44AC diesel (Pennsylvania). I saw it in person, and it was stunning - a beautiful shiny deep maroon that made the stripes and markings stand out smartly. I could only imagine what it would sound like running on its own.
Well, I was kind of disappointed, but not by a whole lot. Of course, the crew talk was (again) the same boring babble, and all other sounds were the same that have been used over and over, and are heard on most of my 15 MTH engines.
The other minor disappointment was the finish. It was low gloss, and the typical PRR tuscan red (not sure that's the right name) was certainly nowhere close to the prototype's maroon shiny finish.
Please understand that I still like this engine very much, and it worked flawlessly right out of the box, as all of my MTH engines have. I was hoping the model would be as dazzling as a model as when I saw it for real. They did beef up the horn, which sounds great, but that's it as far as the sound file changes are concerned. I don't know why they didn't take the opportunity when changing the electronic system to refresh the sound files and give us something new to listen to.
Overall, I love the MTH quality and I guess I have been lucky not to get a bad one. Transman, I feel better that I'm not the only one that noticed the s.o.s. sounds. Lionel has certainly become the leader in O gauge sound systems. (I think that was Neil Young's influence.)
PS -
I edited this post, because originally I had pointed out that the engine startup was identical to my AC4400. I just did a side by side comparison with the ES44ac, and they do have many similarities. Do they, in fact, have the same power systems? I wouldn't even know where to look for the answer, but I'm sure one of you guys or gals would be able to answer it right away. Thanks.
Mike