This Pre Amp does take a little time to warm up and to break in. I heard from some of the reviews the base was not very good, in my opinion it is great. Very happy with overall sound quality with a very warm sound. Very surprised on how the highs are very soft, not sharp and clear without a muffled tone. My listening time to my stereo is up and old music is refreshed. Note: Good recordings are awesome, Poor quality recordings are…. well almost not worth listening to with this Pre Amp.

John