AutoEq / EqualizerAPO preset for STAX SR-009 Electrostatic Earspeaker Headphone

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

# STAX SR-009 Electrostatic Earspeaker Headphone - AutoEq-style parametric preset (measured: AutoEq · Innerfidelity)
# AutoEq-style parametric preset - TheTuningChoice (approximate Harman over-ear (OE 2018) target; estimate, treat as a starting point)
Preamp: -8.6 dB
Filter 1: ON LSC Fc 105 Hz Gain 8.3 dB Q 0.70
Filter 2: ON PK Fc 40 Hz Gain 2.2 dB Q 2.00
Filter 3: ON PK Fc 90 Hz Gain 0.0 dB Q 1.40
Filter 4: ON PK Fc 180 Hz Gain 2.3 dB Q 1.40
Filter 5: ON PK Fc 375 Hz Gain 2.3 dB Q 1.40
Filter 6: ON PK Fc 750 Hz Gain 0.3 dB Q 1.40
Filter 7: ON PK Fc 1500 Hz Gain 1.9 dB Q 1.40
Filter 8: ON PK Fc 3000 Hz Gain 2.0 dB Q 1.40
Filter 9: ON PK Fc 6000 Hz Gain 5.1 dB Q 1.40
Filter 10: ON PK Fc 10000 Hz Gain 3.4 dB Q 2.00

GraphicEQ line (EqualizerAPO)

Preamp: -10.9 dB
GraphicEQ: 20 10.5; 27 10.5; 36 10.6; 47 9.1; 63 6.7; 84 6.2; 112 5.5; 150 4.4; 200 2.9; 267 3.0; 356 3.0; 474 2.2; 632 2.0; 843 1.5; 1125 0.2; 1500 2.3; 2000 5.4; 2667 4.3; 3557 1.9; 4743 1.8; 6325 8.7; 8434 5.5; 11247 3.5; 14998 0.3; 20000 -13.6

CSV band table (phone-app EQs)

105,8.3,0.7
40,2.2,2
90,0.0,1.4
180,2.3,1.4
375,2.3,1.4
750,0.3,1.4
1500,1.9,1.4
3000,2.0,1.4
6000,5.1,1.4
10000,3.4,2

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.