If you could switch it to use 12.5kH bandwidth, it would not help you recieve any better. I would only increase the volume some. Yes I noticed the range difference also, but there is nothing you can do about it except put up an outside antenna to get better reception. I can swap to nfm on my scanner, but I found it picks up a little better in wfm mode.
Pro-106 / Pro-197 / Uniden BC92XLT / Uniden BC355N