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Hi Lee,

Any more info ?

Regards
Ivica

Hi Lee,

Sorry, I have not been clear enough, so may be attached figure would explain:
with the suggested network I have taken that the 'Driver-Horn' response would start to decline from 3.5kHz (...

Hi Lee,

Any trial ???

Regards
Ivica

Hi Lee,

May be You can start with something like this

Regards
Ivica

Hi Lee,

Generally speaking C= 1/(6.2832*Fo*Zo),
so Fo=3500 Hz, Zd=16 ohm , attenuation of -6dB (Ro=16) ==> Zo = Zd*Ro/(Zd+Ro)= 256/32= 8 ohm ==> C= 5.7 uF,
but for different attenuation,...

Hi macaroonie,

Just to be MORE PRECISE: BMS 4590/92 has TWO annular diaphragms too,
but with different purpose:
one larger for mid section ( 3.5-inch vice coil), and
one smaller (1.75-inch) ...