Problem Frequencies
Hertz Hz

0.009765625
0.01953125
0.0390625
0.078125
0.15625
0.3125
0.625
1.25
2.5
5.0
10.0

amplifier gain compress the frequencies D# peak & can be reduced by parametric equalizer Q notch filter.

i find it very interesting that 2500 & 5000 khz does this, wonder why?