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+#+TITLE: EasyEffects EQ Presets - Installation Guide
+#+DATE: 2026-01-28
+
+* Overview
+
+Three parametric EQ presets targeting the Harman frequency response curve, formatted for EasyEffects (PipeWire).
+
+| Preset File                       | Headphone                    | Source                     | Bands | Preamp  |
+|-----------------------------------+------------------------------+----------------------------+-------+---------|
+| dt770-pro-250-harman-eq.json      | Beyerdynamic DT 770 Pro 250  | oratory1990 (hand-tuned)   |     9 | -4.7 dB |
+| pxc-550-ii-harman-eq.json         | Sennheiser PXC 550-II        | AutoEQ / oratory1990 meas. |    10 | -3.0 dB |
+| pixel-buds-pro-2-harman-eq.json   | Google Pixel Buds Pro 2      | AutoEQ / DHRME meas.       |    10 | -2.8 dB |
+
+* Prerequisites
+
+- PipeWire (replaces PulseAudio)
+- pipewire-pulse
+- EasyEffects (~sudo pacman -S easyeffects~)
+
+* Programmatic Install
+
+#+begin_src sh
+./easyeffects-eq-presets.sh install
+#+end_src
+
+Or manually:
+
+#+begin_src sh
+mkdir -p ~/.config/easyeffects/output
+cp *.json ~/.config/easyeffects/output/
+#+end_src
+
+* Manual Usage
+
+1. Open EasyEffects (search in app launcher or run ~easyeffects~)
+2. Go to the *Output* tab (speaker icon, top left)
+3. Click the *Presets* dropdown (top bar)
+4. Select the preset matching your current headphone
+5. Switch presets when you switch headphones
+
+* Notes
+
+- EasyEffects applies EQ system-wide to whatever PipeWire output is active, including Bluetooth
+- Switch presets when switching between headphones — using the wrong preset will sound worse than no EQ
+- The DT 770 preset is for the 250 Ohm version specifically (other impedance variants have different frequency responses)
+- The PXC 550-II and Pixel Buds Pro 2 presets are AutoEQ-generated (algorithmically computed from measurements), not hand-tuned by oratory1990
+- To start EasyEffects minimized at login: ~easyeffects --gapplication-service~