Most digital loudspeaker processor systems use cascaded IIR filters to perform the crossover function and system equalization. This work presents a multirate platform which allows FIR and IIR filters to be freely combined in each output channel. The pros and cons of both filter types are discussed and some techniques to obtain suitable FIR filter coefficients are described. Dual-range AD conversion satisfies the need for high dynamic input range, while look-ahead peak-limiters in the outputs avoid clipping and mechanical damage without introducing noticeable distortion.

Authors: Behler, Gottfried; Goertz, Anselm; Kleber, Jochen; Makarski, Michael; Müller, Swen; Thaden, Rainer
Affiliations: Divisão de Acústica; INMETRO; Four Audio GmbH & Co. KG; Institute of Technical Acoustics; RWTH-Aachen University(See document for exact affiliation information.)
AES Conference: 32nd International Conference: DSP For Loudspeakers (September 2007)
Paper Number: 23
Publication Date: September 1, 2007
Subject: DSP for Loudspeakers

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