As it seems the sound is always there I waold agree with Eric and the soundcard would be to blame. i would try an aftermarket soundcard, I have used a Sound Blaster XFi for external use on various computers and the sound is very good and when I run REW through it it registers nearly flat from 5hz right through to 20khz.


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70