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Loudspeakers
Added moving mass
Explore the ideal effect of adding mass to a driver’s moving assembly.
Inputs
Example valuesResults
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The calculation
r = (Mms + ΔM) / Mms Fs′ = Fs / √r Qes′ = Qes × √r; Qms′ = Qms × √r Qts = Qes × Qms / (Qes + Qms) Sensitivity change = −20 log₁₀(r)
Assumptions & limits
Cms, Rms, Bl, Re and Sd remain constant; therefore Vas is unchanged. The sensitivity estimate applies to the mass-controlled region. Adhesive, suspension changes and mechanical stress can invalidate the model.
Background: Loudspeaker parameters · Elliott Sound Products
