Fundamentals and phase
Frequency, wavelength, phase differences, summation and cancellation: the foundations for understanding how subwoofers interact.
SiLeMI/OFREE COURSE · VIDEO & PDF
Jamais sans mes subs
Subwoofer coupling and directivity control.
How do cardioid subwoofers work? What do phase, delay and end-fire configurations change? I share my course to help you understand these principles, explore simulations and connect them to sound system engineering.
By Matthieu Leroy, sound engineer, sound system engineer and trainer. Recorded in 2020 · French audio · English PDF and subtitles · approximately 2 h 20 min.
Download the English PDF · 228 slides ↓Download the full video · MP4 · 145 MB ↓Watch with English subtitles ↓
French audio with English subtitles. The English PDF and subtitles are an AI-assisted translation of the original French course. We apologise for any inaccuracies; the French version remains the reference. Please report corrections via the contact page.
Watch “Jamais sans mes subs”
Watch the full recording in one video. Click or drag the playback bar to move forwards or backwards, or choose a time range below. You can also download the entire course as a single MP4. The PDF retains the diagrams; animations remain in the video.
Download the complete English subtitles · VTT ↓
The French audio is the original. English subtitles are an AI-assisted translation. We apologise for any inaccuracies; please let me know if a term needs correcting.
What the course covers
Cardioid subwoofers and end-fire arrays
Explore subwoofer array configurations, their directivity patterns and the role of placement, polarity and delay.
Steering and array configurations
Horizontal and vertical steering, virtual arcs and special configurations, illustrated with simulations and examples.
From simulation to the venue
Read a prediction, understand its limits and relate it to the real deployment and measurements.
Take the slides with you
The PDF contains all 228 slides, with a clickable link to SiLeMI/O on every page. This is a teaching resource from 2020: it supports understanding and does not replace checking a specific installation on site. Sources and original credits are retained in both versions.
A course, a system or a project to discuss?
This course is an example of how I teach. Explore my background and other training topics, or contact me to discuss your team’s needs.