T1
T2
T3
C4
C5
C6
C10 C11 C12
S1
S2
S3
S4
Figure 21
Setting the Subwoofer gain
Disconnect the speakers from the power amplifiers.
Connect the MF/HF power amplifier to the Subwoofer output of the unit.
Set the output level of the oscillator to zero and connect it to the appropriate test input socket.
+
+
Set the oscillator frequency to 25Hz.
Set Bank 1 Switch 1 to ON.
Set Bank 4 Switch 2 to ON.
Set Bank 2 Switches 2 & 3 to OFF.
Connect the AC voltmeter to the output terminals of the MF/HF amplifier.
Raise the output level of the oscillator until the meter reads 2 volts.
Substitute the LF power amplifier for the MF/HF power amplifier. Do not alter the output setting of
the oscillator.
Set Bank 4 Switch 2 to OFF.
Adjust the Subwoofer output gain control (C14) until the meter again reads 2 volts.
Configure the dipole lobe for a CT8 DS
Set Bank 3 Switch 3 as required by figure 21 according to the position of the CT8 DS in the system.
Set Bank 3 Switch 2 as desired according to preference and Bank 3 Switch 3 as required by
figure 21.
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