AutoEq / EqualizerAPO preset for HiFiMAN Massdrop HE-350 Headphones (Open Box/ Demo Unit)

Generated from this product's measured frequency response (source: SBAF HPDB · Flat Plate), 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 AutoEq CSV (Qudelix / Wavelet)

Parametric preset (AutoEq / EqualizerAPO format)

# HiFiMAN Massdrop  HE-350 Headphones (Open Box/ Demo Unit) - AutoEq-style parametric preset (measured: SBAF HPDB · Flat Plate)
# 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 -0.8 dB Q 2.00
Filter 3: ON PK Fc 90 Hz Gain -8.0 dB Q 1.40
Filter 4: ON PK Fc 180 Hz Gain -5.5 dB Q 1.40
Filter 5: ON PK Fc 375 Hz Gain -2.6 dB Q 1.40
Filter 6: ON PK Fc 750 Hz Gain -1.7 dB Q 1.40
Filter 7: ON PK Fc 1500 Hz Gain 4.5 dB Q 1.40
Filter 8: ON PK Fc 3000 Hz Gain 7.3 dB Q 1.40
Filter 9: ON PK Fc 6000 Hz Gain -0.8 dB Q 1.40
Filter 10: ON PK Fc 10000 Hz Gain -8.2 dB Q 2.00

GraphicEQ line (EqualizerAPO)

Preamp: -13.4 dB
GraphicEQ: 20 13.1; 27 9.8; 36 6.5; 47 3.1; 63 -0.5; 84 -3.7; 112 -5.2; 150 -5.9; 200 -6.4; 267 -5.9; 356 -3.9; 474 -2.3; 632 -2.2; 843 -0.6; 1125 1.3; 1500 5.0; 2000 8.3; 2667 10.7; 3557 4.0; 4743 -0.1; 6325 -0.4; 8434 -2.0; 11247 -11.2; 14998 -15.0; 20000 -17.9

CSV band table (phone-app EQs)

105,7.7,0.7
40,-0.8,2
90,-8.0,1.4
180,-5.5,1.4
375,-2.6,1.4
750,-1.7,1.4
1500,4.5,1.4
3000,7.3,1.4
6000,-0.8,1.4
10000,-8.2,2

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.

Qudelix-5K / 71: the CSV is the AutoEq interchange the app's EQ import accepts - open the EQ screen, import/paste, and the ten bands above land as parametric filters (connect the app to the dongle first). Wavelet (Android): the same CSV feeds its parametric-EQ import; on setups without import, the band table above is short enough to type in by hand. Menu names move between app versions - the numbers stay the same.

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.