AutoEq / EqualizerAPO preset for Koss: Porta Pro Utility Headphones

Generated from this product's measured frequency response (source: AutoEq · Headphone.com Legacy), corrected toward an approximate Harman over-ear (OE 2018) target. This is an estimate - every ear and every rig differs; treat the numbers as a starting point.

Download parametric .txt Download GraphicEQ.txt

Parametric preset (AutoEq / EqualizerAPO format)

# Koss: Porta Pro Utility Headphones - AutoEq-style parametric preset (measured: AutoEq · Headphone.com Legacy)
# AutoEq-style parametric preset - TheTuningChoice (approximate Harman over-ear (OE 2018) target; estimate, treat as a starting point)
Preamp: -8.0 dB
Filter 1: ON LSC Fc 105 Hz Gain 7.7 dB Q 0.70
Filter 2: ON PK Fc 40 Hz Gain -0.5 dB Q 2.00
Filter 3: ON PK Fc 90 Hz Gain -7.2 dB Q 1.40
Filter 4: ON PK Fc 180 Hz Gain -4.2 dB Q 1.40
Filter 5: ON PK Fc 375 Hz Gain -0.9 dB Q 1.40
Filter 6: ON PK Fc 750 Hz Gain 0.5 dB Q 1.40
Filter 7: ON PK Fc 1500 Hz Gain 0.0 dB Q 1.40
Filter 8: ON PK Fc 3000 Hz Gain -1.1 dB Q 1.40
Filter 9: ON PK Fc 6000 Hz Gain 6.2 dB Q 1.40
Filter 10: ON PK Fc 10000 Hz Gain 0.5 dB Q 2.00

GraphicEQ line (EqualizerAPO)

Preamp: -13.1 dB
GraphicEQ: 20 12.8; 27 9.8; 36 6.8; 47 3.7; 63 0.5; 84 -2.4; 112 -4.0; 150 -4.7; 200 -4.8; 267 -3.1; 356 -1.8; 474 -0.6; 632 0.1; 843 0.1; 1125 0.4; 1500 0.6; 2000 -1.3; 2667 -0.3; 3557 1.1; 4743 0.6; 6325 9.6; 8434 3.6; 11247 3.2; 14998 -2.6; 20000 -18.8

How this format loads

EqualizerAPO: the .txt goes in your config folder and is included from config.txt (the parametric filters apply system-wide on Windows). Wavelet and most DAPs accept the same band table typed into their parametric EQ: same frequencies, same gains, same Q. Preamp exists so the loudest boosted band cannot clip.

Facts on this page come from the measured curve on file; the target curve and the fit are approximations. Nothing here is a recommendation to EQ - it is the preset, labeled, for people who already EQ.