4
M20.02, M20.03, and MS 3
M 2 0 . 0 3 a n d M S 3 B l o c k D i a g r a m
Input stage: The input signal first passes through an electronically balanced input stage and is then simultaneously directed to
the low pass (LP), mid pass (MP) and high pass (HP) section.
Low pass section: The signal is first subsonically filtered with a 24dB Butterworth high pass filter. Thereafter the signal is fil-
tered to its crossover point with a 24dB Linkwitz-Riley low pass filter. The signal then passes through the limitation section to
the electronically servo-balanced output stage.
Mid pass section: The signal is subsonically filtered with a 24dB Linkwitz-Riley high pass filter at the right crossover point
between the low and mid section. Thereafter, the signal is filtered to its crossover point between the mid and high section with
a 24dB Linkwitz-Riley low pass filter. The signal then passes through the limitation section to the electronically servo-bal-
anced output stage.
High pass section: The signal is first filtered to its crossover point with a 24dB Linkwitz-Riley high pass filter. The signal
then passes through the limitation section to the electronically servo-balanced output stage.
The sense input on the controller measures the amplifier output directly. If the signal is too high compared to the settings of the
internal DIP-switches, the signal to the amplifier will be reduced.
