Cascading Pleiades (R,L) microphone filters

Since they are defined by complex numbers ie vectors ie ordered pairs parallel connection works out  as follows:


(R1,L1)//(R2,L2)=(R1//R2,L1//L2)


This is confirm by R,L measurment of the resultant electrical network or filter.


For example 2 Pleiades (130Ω,40mH) filters connected one after the other (for example 2 XLR adaptors one after the other) make one
Pleiades (65Ω,20mH)
a filter sounding more bright or a filter sounding the same with a microphone of half impeadnce.