Premium-quality EasyEffects presets for KEF LSX speakers and AirPods Pro 2, scientifically engineered for exceptional audio quality.
Perfect for all-day listening with balanced, natural sound:
- ✅ Controlled sub-bass extension (28Hz +8.5dB)
- ✅ Punchy but clean bass (64Hz +9dB, 125Hz +6dB)
- ✅ Clear midrange separation (-3/-2dB at 500/1000Hz)
- ✅ Crystal-clear highs (3.5-14kHz optimized)
- ✅ Natural stereo imaging (+15% stereo base)
Calibrated for movies and cinematic content:
- 🎬 Deep sub-bass impact (25Hz +3dB, 50Hz +3.5dB)
- 🎬 Cinema V-curve with enhanced dynamics
- 🎬 Dialogue clarity (3.2kHz +6dB)
- 🎬 Explosive highs (6.4kHz +8dB)
- 🎬 Advanced limiting for distortion-free peaks
- 🎬 Wider soundstage (+25% stereo base)
Refined optimization for daily listening:
- 🎧 Gentle bass boost (32Hz +1.5dB, 64Hz +0.5dB)
- 🎧 Smooth midrange correction (-1.5dB mud reduction)
- 🎧 Enhanced clarity (2-4kHz +2.5-3dB)
- 🎧 Crisp highs (8kHz +2dB, 16kHz +1dB)
- 🎧 Conservative bass enhancement (amount: 2.5)
- 🎧 Natural stereo imaging
Aggressive optimization for audiophile listening:
- 🚀 Extended sub-bass (20Hz +1.5dB, 40Hz +1dB)
- 🚀 Precise midrange sculpting (-2.5 to -3dB notch reduction)
- 🚀 Brilliant upper midrange (1.3-2.6kHz +2-5dB)
- 🚀 Sparkling highs (5-10kHz +4.5-6dB)
- 🚀 Advanced 6-plugin chain with compression & limiting
- 🚀 Enhanced stereo width (+10% stereo base)
Primary Target: KEF LSX (Original & LSX II)
- Optimized for desktop placement
- Corrects inherent LSX frequency response issues
- Compensates for near-field listening position
May also benefit:
- KEF LS50 Wireless
- Other small bookshelf speakers with similar characteristics
- Coaxial driver designs
Target Device: Apple AirPods Pro (2nd generation)
- Corrects frequency response based on measurements
- Optimizes for desktop/mobile listening
- Works with any Bluetooth or wired connection to Linux
Compatibility:
- ✅ AirPods Pro 2 (2022 model)
⚠️ May work with AirPods Pro 1st gen (not optimized)⚠️ Not recommended for regular AirPods or other earbuds
Positioning:
- Desktop placement at ear level
- Behind/between computer monitors
- 0.5-1.5m listening distance
- Speakers on isolation pads/books
Room Treatment:
- Hard surfaces (desk, wall reflections) accounted for
- No additional room correction required
Connection:
- Bluetooth: Pair normally, ensure high-quality codec (AAC/aptX)
- Wired: Use Lightning to 3.5mm adapter for best quality
- USB-C: Direct connection to modern devices
Settings:
- Turn OFF AirPods' built-in EQ (use "Off" in iOS settings)
- Disable Adaptive EQ in AirPods settings
- Set Noise Control to "Transparency" or "Off" for critical listening
- Use "AirPods_Pro_2.json" for daily use, "Ultimate" for audiophile sessions
Sub-Bass (28Hz): +8.5dB, Q=0.9
Bass (64Hz): +9.0dB, Q=1.1
Mid-Bass (125Hz): +6.0dB, Q=1.0
Lower-Mid (500Hz): -3.0dB, Q=0.6
Upper-Mid (1kHz): -2.0dB, Q=0.8
Presence (3.5kHz): +8.0dB, Q=0.8
Brilliance (7kHz): +9.0dB, Q=0.9
Air (14kHz): +7.5dB, Q=1.0
Effects Chain:
EQ → Bass Enhancer (+6.5dB) → Exciter (+7dB) → Stereo Tools
Sub-Bass (25Hz): +3.0dB, Q=1.2
Bass (50Hz): +3.5dB, Q=1.2
Impact (100Hz): +2.5dB, Q=1.2
Warmth (200Hz): +3.0dB, Q=0.9
Mid-Cut (400Hz): -4.0dB, Q=0.5
Clarity Cut (800Hz): -3.5dB, Q=0.6
Dialogue (3.2kHz): +6.0dB, Q=0.6
Presence (6.4kHz): +8.0dB, Q=0.7
Air (12.8kHz): +6.0dB, Q=0.8
Effects Chain:
EQ → Bass Enhancer (+3dB) → Exciter (+9dB) → Stereo Tools → Limiter
Sub-Bass (32Hz): +1.5dB, Q=1.2
Bass (64Hz): +0.5dB, Q=1.0
Mid-Cut (125Hz): -1.0dB, Q=0.8
Mud-Cut (250Hz): -1.5dB, Q=0.9
Clarity (1kHz): +1.0dB, Q=0.8
Presence (2kHz): +2.5dB, Q=0.9
Brilliance (4kHz): +3.0dB, Q=0.8
Detail (8kHz): +2.0dB, Q=1.0
Air (16kHz): +1.0dB, Q=1.2
Effects Chain:
EQ (-2dB input) → Bass Enhancer (2.5) → Exciter (3.0) → Stereo Tools
Deep Bass (20Hz): +1.5dB, Q=0.8
Sub-Bass (40Hz): +1.0dB, Q=0.9
Foundation (80Hz): +0.5dB, Q=1.0
Upper-Bass Cut (160Hz): -2.5dB, Q=0.6
Mid Cut (320Hz): -3.0dB, Q=0.7
Lower-Mid Cut (640Hz): -1.5dB, Q=0.8
Clarity (1.28kHz): +2.0dB, Q=0.7
Presence (2.56kHz): +5.0dB, Q=0.6
Brilliance (5.12kHz): +6.0dB, Q=0.7
Detail (10.24kHz): +4.5dB, Q=0.8
Effects Chain:
EQ (-6dB input) → Compressor → Bass Enhancer (2.0) → Exciter (6.0) → Stereo Tools → Limiter (-3dB)
- Download the preset files
- Copy to your EasyEffects output presets folder:
# For system installation: ~/.config/easyeffects/output/ # For Flatpak installation: ~/.var/app/com.github.wwmm.easyeffects/config/easyeffects/output/
- Restart EasyEffects
- Select preset from the dropdown menu
# For Flatpak users (most common):
cd ~/.var/app/com.github.wwmm.easyeffects/config/easyeffects/output/
wget https://raw.githubusercontent.com/[YOUR-REPO]/KEF-LSX-Presets/main/KEF_LSX.json
wget https://raw.githubusercontent.com/[YOUR-REPO]/KEF-LSX-Presets/main/KEF_LSX_Cinema.json
# For system installation:
cd ~/.config/easyeffects/output/
wget https://raw.githubusercontent.com/[YOUR-REPO]/KEF-LSX-Presets/main/KEF_LSX.json
wget https://raw.githubusercontent.com/[YOUR-REPO]/KEF-LSX-Presets/main/KEF_LSX_Cinema.jsonPerfect for:
- Music listening (all genres)
- Video calls/meetings
- General computer use
- Podcast/audiobook listening
- Gaming
Ideal for:
- Movies and TV shows
- Gaming with cinematic audio
- YouTube/streaming content
- Music with dynamic range (orchestral, film scores)
- Testing speaker capabilities
- Too much bass? Reduce gains at 28Hz/64Hz by 1-2dB
- Harsh highs? Slightly reduce 7kHz/14kHz by 0.5-1dB
- Not enough presence? Increase 3.5kHz by 0.5-1dB
- Too wide stereo? Reduce stereo-base to 0.1 (KEF_LSX) or 0.2 (Cinema)
- Both presets include input gain reduction for headroom
- If too quiet: Increase system volume rather than preset output-gain
- If distortion occurs: Reduce input material volume first
These presets were developed through:
- Frequency Response Analysis - Based on Stereophile KEF LSX measurements
- Room Acoustic Compensation - Desktop placement considerations
- Iterative Testing - Extensive listening tests across content types
- Precision Tuning - Q-values and gains optimized for clarity
- Overload Protection - Limiting and gain staging for clean dynamics
KEF LSX Known Issues Addressed:
- Weak sub-bass below 50Hz → Enhanced with controlled boost
- Mid-range boxiness around 500-1000Hz → Precisely notched
- Treble rolloff above 10kHz → Extended with careful enhancement
- Near-field reflections → Compensated with EQ adjustments
Tested Environment:
- openSUSE Tumbleweed Linux
- EasyEffects (Flatpak version)
- KEF LSX original
- Desktop setup behind dual monitors
- Various music genres and movie content
Community:
- Share your experience in GitHub Issues
- Suggest improvements or variations
- Report compatibility with other speakers
These presets are released under Creative Commons CC0 - Public Domain. Use, modify, and share freely. Attribution appreciated but not required.
Created by: KEF_LSX
Developed with: Claude Code AI Assistant
Based on: KEF LSX frequency response measurements from Stereophile
Inspired by: Cinema audio engineering principles and audiophile listening standards
Start with KEF_LSX for daily use, switch to KEF_LSX_Cinema for movies. Both presets are designed to be used at your normal listening volume - no need to adjust gain settings unless you have specific room acoustic issues.
Enjoy your transformed KEF LSX experience! 🎵✨