New member here, so apologies in advance for any mistakes. I'm trying to figure out why the Bose system in my 06 Avy sounds so much worse than the (apparently) same system I had in an 07 Silverado. I've seen mentions in this forum about midrange speakers, and just from the sound of that I'm thinking that might be the problem since I have great lows and shrill highs with little or nothing in between. I would have thought the systems in an 06 and an 07 would be essentially the same, but I don't know that for a fact by any means. Thoughts and suggestions are welcome, and thanks!