With ported vs sealed, it also go for the type of music (Sound) you will mostly be playing. Ported it good for a very specific frequency. They are also good for a sustained sound. Sealed have a better over all frequency range, but aren't as load. They are also excellent for quickly changing sound. When listening to music I like a sealed sound better over ported. But with most locomotives' prime movers being about a small freq range a ported would make it louder. But like said, we just don't have the room to do it right. But also said, you can greatly improve it with experimentation. Some is better then none.
But the short of it is, you need a speaker baffle, and you must match impedance of the speaker(s) to the amp.
