AES E-Library

Interactions in a Multiple-Voice-Coil Digital Loudspeaker

A 7-bit digital multiple-voice-coil loudspeaker and a constant current driver have been constructed and evaluated. Two's complement coding offers the best compromise between complexity, excessive power consumption, and distortion due to baseline drift. The effect of motion impedance and mutual coupling in a multiple-coil system is found to magnify the effective impedance of an individual coil by its weighting in the binary representation. This effect places an unreasonable demand on the output impedance of the driver unless damping is controlled, which can be achieved most effectively by a short-circuited voice coil. Optimum damping occurs when the damping resistance is equal to the negative resistance of an individual coil.

Authors: Huang, Yaxiong; Busbridge, Simon C.; Fryer, Peter A.
Affiliations: School of Engineering, University of Brighton, Brighton, UK ; B&W Loudspeakers Ltd., Steyning, UK(See document for exact affiliation information.)
JAES Volume 48 Issue 6 pp. 545-552; June 2000 Import into BibTeX

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD aes6)   /jrnl9800/2000/2835.pdf

Start a discussion about this paper!