Does anyone notice that when they only have 1 bar or no bars of reception that the speaker sounds a little tinny?

I traded a 700w in today (I had one for 5 days but there was a battery problem) for another 700w. I spoke to some ppl on my phone today, as well as checking voicemail, and the speaker doesn't sound 100%. My old 700w (the one i replaced today) didn't do that, i don't think. When i made a test call at the verizon store i didn't notice the problem, and there was great reception there. Where i'm calling from here, in my dorm, there is only a bar or two of reception at most.