Koss Porta Pro APO EQ Flat@HF 96000Hz December182021-162029 Preamp: -8 dB Filter 1: ON PK Fc 24.98 Hz Gain 8.32 dB Q 0.65 Filter 2: ON PK Fc 151.98 Hz Gain -5.55 dB Q 0.70 Filter 3: ON PK Fc 1938.60 Hz Gain -1.77 dB Q 2.91 Filter 4: ON PK Fc 3934.00 Hz Gain 8.77 dB Q 2.68 Filter 5: ON PK Fc 5848.63 Hz Gain -11.24 dB Q 3.22 Filter 6: ON PK Fc 6632.01 Hz Gain 9.12 dB Q 4.74 Filter 7: ON PK Fc 8382.86 Hz Gain 9.04 dB Q 2.14 Filter 8: ON PK Fc 11343.35 Hz Gain -6.65 dB Q 3.24