Dayton-audio ND91-8 3-1 User Manual download pdf

Introduction

Large Signal Modeling

t higher amplitudes, loudspeakers produce substantial distortion in the output signal, generated by

nonlinear ties inherent in the transducer. The dominant nonlinear distortions are predictable and are

closely related with the general principle, particular design, material properties and assembling

techniques of the loudspeaker. The Klippel Distortion Analyzer combines nonlinear measurement

techniques with computer simulation to explain the generation of the nonlinear distortions, to identify

their physical causes and to give suggestion for constructional improvements. Better insight into the

nonlinear mechanisms ma

kes it possible to further optimize the transducer in respect with sound

quality, weight, size and cost.

Nonlinear Characteristics

The dominant nonlinearities are modelled by variable parameters such as

More information about these parameters can be found in the article “

Displacement limits”

Klippel Non-Linear Test

Results

LSI (Large Signal

Identification)

Driver Name: ND91-8

Bl(x) instantaneous electro-dynamic coupling factor (force factor of the

motor) defined by the integral of the magnetic flux density B over

voice coil length l as a function of displacement

KMS(x) mechanical stiffness of driver suspension a function of

displacement

LE(i) voice coil inductance as a function of input current (describes

nonlinear permeability of the iron path)

LE(x) voice coil inductance as a function of displacement

1 2 3 4 5 6 7 8

Summary of Contents

Page 1 - Nonlinear Characteristics

IntroductionLarge Signal Modeling At higher amplitudes, loudspeakers produce substantial distortion in the output signal, generated by nonlinear ties

Page 2 - Nonlinear Parameters

The electrodynamic coupling factor, also called Bl-product or force factor Bl(x), is defined by the integral of the magnetic flux density B ov

Page 3 - Mechanical Suspension”

The stiffness KMS(x) describes the mechanical properties of the suspension. It's inverse is the compliance CMS(x)More information regarding Kms(x

Page 4

The inductance components Le (x) and Bl(i) of most drivers have a strong asymmetric characteristic. If the voice coil moves towards the back plate th

Page 5 - Mode Properties

Nonlinear Parameters The displacement limits XBL, XC, XL and Xd describe the limiting effect for the force factor Bl(x), compliance Cms(x), inductanc

Page 6 - Linear Parameters

Linear Parameters Symbol Large + Warm Large + Cold Small Signal Unit Comment Note: for accurate small signal parameters, use LPM m

Page 7 - Asymmetrical Nonlinearities

Asymmetrical nonlinearities produce not only second- and higher-order distortions but also a dc-part in the displacement by rectifying low frequency c

Page 8 - Kms Symmetry xc(x)

Kms Symmetry xc(x)This curve shows the symmetry point in the nonlinear compliance curve where a negative and positive displacement x=xpeak will produc

Dayton-audio ND91-8 3-1 User Manual

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Dayton-audio ND91-8 3-1 User Manual

Browse online or download User Manual for Acoustics Dayton-audio ND91-8 3-1. Dayton Audio ND91-8 3-1 User Manual

Summary of Contents

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