The bass and treble area do sound fantastic as I can hear this preamp hitting highs that I could not realize with my 30 year old preamp it replaced. Its not always apparent, but from time to time, I do notice it.
However, in order to achieve such a level of improvement, one needs to spend at least 3 times as much as my previous preamp costs (at that given time vs. the cost of this new preamp) - giving my 30 year old preamp props that it punches up in weight and can still kick a-- against anything that you would find in todays best buy stores.