Design and implementation of a high efficiency subwoofer

Sebastian Tengvall; Niels E. Iversen; Arnold Knott

Design and implementation of a high efficiency subwoofer

Sebastian Tengvall, Niels E. Iversen, Arnold Knott^*

^*Corresponding author for this work

Technical University of Denmark

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

The demand for battery driven loudspeakers is increasing but the challenge of efficient low frequency reproduction remains. An alternative approach to the conventional 4^th order bandpass enclosure design for a subwoofer to achieve a high peak in the passband and increase voltage sensitivity is investigated. The response is corrected with DSP to ensure a flat response in the passband. The results proved that this approach can increase the voltage sensitivity dramatically, reaching an average sensitivity of over 100dB in the passband from 45Hz to 90Hz. It also showed that the design is sensitive to construction errors. Precise assembling is required to achieve satisfactory results, while small errors can ruin the purpose of the design.

Original language	English
Title of host publication	Proceedings of 144th Audio Engineering Society Convention 2018
Publisher	Audio Engineering Society
Publication date	1 Jan 2018
Publication status	Published - 1 Jan 2018
Event	144th Audio Engineering Society Convention - NH Hotel Milano Congress Centre, Milan, Italy Duration: 23 May 2018 → 26 May 2018 Conference number: 144

Conference

Conference	144th Audio Engineering Society Convention
Number	144
Location	NH Hotel Milano Congress Centre
Country/Territory	Italy
City	Milan
Period	23/05/2018 → 26/05/2018

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title = "Design and implementation of a high efficiency subwoofer",

abstract = "The demand for battery driven loudspeakers is increasing but the challenge of efficient low frequency reproduction remains. An alternative approach to the conventional 4th order bandpass enclosure design for a subwoofer to achieve a high peak in the passband and increase voltage sensitivity is investigated. The response is corrected with DSP to ensure a flat response in the passband. The results proved that this approach can increase the voltage sensitivity dramatically, reaching an average sensitivity of over 100dB in the passband from 45Hz to 90Hz. It also showed that the design is sensitive to construction errors. Precise assembling is required to achieve satisfactory results, while small errors can ruin the purpose of the design.",

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AU - Iversen, Niels E.

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N2 - The demand for battery driven loudspeakers is increasing but the challenge of efficient low frequency reproduction remains. An alternative approach to the conventional 4th order bandpass enclosure design for a subwoofer to achieve a high peak in the passband and increase voltage sensitivity is investigated. The response is corrected with DSP to ensure a flat response in the passband. The results proved that this approach can increase the voltage sensitivity dramatically, reaching an average sensitivity of over 100dB in the passband from 45Hz to 90Hz. It also showed that the design is sensitive to construction errors. Precise assembling is required to achieve satisfactory results, while small errors can ruin the purpose of the design.

AB - The demand for battery driven loudspeakers is increasing but the challenge of efficient low frequency reproduction remains. An alternative approach to the conventional 4th order bandpass enclosure design for a subwoofer to achieve a high peak in the passband and increase voltage sensitivity is investigated. The response is corrected with DSP to ensure a flat response in the passband. The results proved that this approach can increase the voltage sensitivity dramatically, reaching an average sensitivity of over 100dB in the passband from 45Hz to 90Hz. It also showed that the design is sensitive to construction errors. Precise assembling is required to achieve satisfactory results, while small errors can ruin the purpose of the design.

M3 - Article in proceedings

AN - SCOPUS:85050011509

BT - Proceedings of 144th Audio Engineering Society Convention 2018

PB - Audio Engineering Society

T2 - 144th Audio Engineering Society Convention

Y2 - 23 May 2018 through 26 May 2018

ER -

Design and implementation of a high efficiency subwoofer

Abstract

Conference

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