The day after Christmas I got my new Monster HTS 5100. All I can say is this thing is great. Before I had some noise problems coming through my system from various things like power tools & a couple household appliances & now I don't even get a hint of it what so ever. I noticed a slight improvement in my sound quality. High frequency detail seamed to improve some. Things like cymbal crashes sounded muffled before now come through much brighter & more detailed. And before I had a slight hiss at high volume in quite passages that is now unnoticeable. I don't really think midrange or bass response was improved or affected in any way that I have noticed, but I am very happy with what I have noticed so far. Just thought I would share my thoughts it was definitely worth what I paid for it.