AES Warsaw 2015
Tutorial T7

Friday, May 8, 11:45 — 13:15 (Room: Kr√≥lewski)


T7 - Live Sound Subwoofer System Calibration

Adam J. Hill, University of Derby - Derby, Derbyshire, UK

Achieving even low-frequency coverage across a large audience area while simultaneously minimizing sound energy on stage is easier said than done in large-scale live sound reinforcement. Non-ideal subwoofer system calibration causes severe seat-to-seat variability in frequency response, which often goes unnoticed by engineers firmly planted to the mix position. This tutorial presents practical approaches to system calibration which provide improved low-frequency performance. Source placement, polar pattern control, clustering and DSP techniques are explained using simulations to highlight their respective advantages and disadvantages. All solutions offered consider practical restrictions including: system efficiency, stage layout, truck space, work timeframe, budget, etc. Perceptual considerations are also touched upon, inspecting whether the increasingly-common method of driving subwoofers with a mono auxiliary send is an imperfect approach.

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EXHIBITION HOURS May 7th   10:00 – 18:00 May 8th   09:00 – 18:00 May 9th   09:00 – 18:00
REGISTRATION DESK May 6th   15:00 – 18:00 May 7th   09:30 – 18:30 May 8th   08:30 – 18:30 May 9th   08:30 – 18:30 May 10th   08:30 – 16:30
TECHNICAL PROGRAM May 7th   10:00 – 18:00 May 8th   09:00 – 18:00 May 9th   09:00 – 18:00 May 10th   09:00 – 17:00
AES - Audio Engineering Society