AutoEq / EqualizerAPO preset for Sennheiser HD620S Closed-Back Wired Audiophile Headphones

Generated from this product's measured frequency response (source: AutoEq · Kuulokenurkka), 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)

# Sennheiser HD620S Closed-Back Wired Audiophile Headphones - AutoEq-style parametric preset (measured: AutoEq · Kuulokenurkka)
# AutoEq-style parametric preset - TheTuningChoice (approximate Harman over-ear (OE 2018) target; estimate, treat as a starting point)
Preamp: -3.1 dB
Filter 1: ON LSC Fc 105 Hz Gain -0.6 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 -3.2 dB Q 1.40
Filter 4: ON PK Fc 180 Hz Gain 0.0 dB Q 1.40
Filter 5: ON PK Fc 375 Hz Gain 0.8 dB Q 1.40
Filter 6: ON PK Fc 750 Hz Gain -0.9 dB Q 1.40
Filter 7: ON PK Fc 1500 Hz Gain 1.5 dB Q 1.40
Filter 8: ON PK Fc 3000 Hz Gain 0.5 dB Q 1.40
Filter 9: ON PK Fc 6000 Hz Gain 0.9 dB Q 1.40
Filter 10: ON PK Fc 10000 Hz Gain 2.8 dB Q 2.00

GraphicEQ line (EqualizerAPO)

Preamp: -3.7 dB
GraphicEQ: 20 -0.8; 27 -1.1; 36 -0.8; 47 -0.7; 63 -0.2; 84 -3.0; 112 -5.3; 150 -2.8; 200 1.3; 267 2.0; 356 0.5; 474 -0.5; 632 -1.2; 843 1.4; 1125 0.5; 1500 2.0; 2000 1.7; 2667 -2.2; 3557 3.4; 4743 1.1; 6325 1.1; 8434 2.4; 11247 1.7; 14998 -4.3; 20000 -20.2

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.