Recently purchased the above amp and am still tinkering with the setup. Didn't audition the amp before and am finding it a little 'muffled' in sound compared to my old Yamaha amp. Also I am curious to know what level you listen to your audio sources at. The volume range goes from -70 to +18db but I am finding I am listening at around -30db + to get a decent amount of volume. Is this normal?