Efficiency Investigation of Subwoofer Driven Around Resonance Frequency

Thydal T, Iversen NE, Knott A. Efficiency Investigation of Subwoofer Driven Around Resonance Frequency. In: AES Convention 142. Audio Engineering Society; 2017. Paper 9698. Available from: https://aes.org/publications/elibrary-page/?id=18576

@inproceedings{Thydal2017_18576,
  author = {Thydal, Tobias and Iversen, Niels Elkjær and Knott, Arnold},
  title = {{Efficiency Investigation of Subwoofer Driven Around Resonance Frequency}},
  booktitle = {AES Convention 142},
  note = {Paper 9698},
  year = {2017},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=18576}
}

TY  - CPAPER
TI  - Efficiency Investigation of Subwoofer Driven Around Resonance Frequency
AU  - Thydal, Tobias
AU  - Iversen, Niels Elkjær
AU  - Knott, Arnold
T2  - AES Convention 142
M1  - Paper 9698
PY  - 2017
DA  - 2017/05/06
UR  - https://aes.org/publications/elibrary-page/?id=18576
PB  - Audio Engineering Society
LA  - en
AB  - The need for efficient portable speaker systems has increased tremendously over the past 10 years. The batteries, amplifiers, and filtering has all seen great improvements in efficiency leaving the speakers’ units as the most inefficient part of the system, mainly due to the large amounts of current drawn that ends up being dissipated as heat in the voice coil. This paper will look at how you can design a speaker system to take advantage of the resonance of a speaker unit, since that is where the unit is most efficient and draws the least current. A subwoofer speaker system will be designed with focus on only driving the speaker units near their resonance frequency. The tests found that with modern DSP it was rather simple to design a speaker system that operates in a very narrow frequency band around the speaker units’ resonance frequencies, which in turn ensured a very small current draw. This greatest drawback of this method is the increase in components needed, which drives up cost and complexity.
ER  -