Master audio EL Series User Manual page 23

Master Audio
2.2.3. Passive configuration with Subwoofer
There will be times when you will be interested in reinforcing your EL Systems
with subwoofer units, in passive mode.
In this case one amplifier will be only used for the whole system.
In passive, connect one of the outputs of the amplifier to the subwoofer through
a wire.
Then, make a bridge from the slave Speakon connector of the subwoofer to its
respective mid-high satellite unit, always respecting the correct polarity between
both systems.
Do the same with the other channel.
It is also correct, if the installation requires so, to make the connection in the
opposite way, that is, from the amplifier to the satellite and then to the
subwoofer.
Fig.5. Passive with subwoofer configuration
2.2.4. Bi-Amplified configuration with Subwoofer
2
A wire with the maximum available section (4mm minimum) will have to link the
low frequencies output channel of the amplifier to one of the subwoofers.
Two subwoofers can be also connected by bridge one to another, as long as
the polarity is strictly respected.
Connect the other output of the amplifier to the Full Range cabinets.
It is also possible to use only one amplifier for the low reinforcement, connecting
each one of the subwoofers to the two outputs of the amplifier and
consequently, connecting the Full Range cabinets to a second amplifier.
Fig.6. Bi-amplified with subwoofer configuration (option 1)
EL Series. Version 1.4 23 Nov 09