It should remain the same frequency, sometimes when the agency switches to narrowband they sometimes switch the pl code. I don't listen to hartford so I couldn't tell you if they switched frequencies or not.
Narrowbanding has nothing to do with the frequency in use. It has to do with the bandwidth of the
system's transmitted signal and the receiver's bandwidth as set it its program.
The old police station had the dispatch center in it and was at 50 Jennings Rd. The FD administration was at 275 Pearl St. Both have moved to the new public safety facility at 253 High St.
It seems like the tones are at one volume (too high) and the voice is set too low. It isn't muffled as much as it is just too quiet.
Narrowbanding can affect negatively a radio system but they narrowbanded the 154.3100 several months ago. The trunked system wasn't affected by narrowbanding.
It might just be coming from the new dispatch microphones at the new PSC. Does it sound muffled on Incident 1 on the 800 Mhz system too or just 154.310?