I posted this thread several weeks ago (check MRC synchro sound) as I am in the same boat as you and thought it looked like a good idea. Several people suggested that if you didn’t mind having your sound come from a single location it might be worth a try. My layout is relatively small so I think it would work for me. Does any one know what they’re worth?
I am in the same boat as you. My layout is small, roughly a 5’X9’, so having sound come from one location is not really a problem with me. Eventually I would like to get locomotives that produce their own sound, but that is out of my budget as of now.
#1 - Yes, you can hold down the button and it will sound like a continuous horn.
#2 - Yes, it connects to the power pack. You can also connect it to a DCC controller and control it through the DCC controller. No, the speaker does not connect to the power pack. It connects to the MRC unit.
my layout is 2ftx4ft and I baught one 3years ago and works great you can hook up stereo speakers also and adjust different sounds well worth it if your dc like me