Subzero AMPLIFIER Series User Manual page 9

AMPLIFIER 120w
100V LINE SYSTEMS
For 100V line systems, connect the amplifier to the
first speaker in the system using double-insulated
speaker wire which has adequate current rating to
handle the total output of the amplifier.
Connect the "100V" output terminal to the positive
(+) connection of the speaker and "COM" output to
the negative (-) connection of the speaker. Connect
further speakers in parallel to the first speaker with
all positive terminals connected and all negative
terminals connected as shown above.
A 100V line speaker system can comprise of
multiple speakers connected in parallel. The
number of speakers you are able to connect to
a single amplifier is dependent on the amplifiers
power rating. For most purposes, it is advised
to connect as many speakers as needed with a
combined wattage of no more than 90% of the
amplifier's output power rating.
NOTE:
- For the ZA240 the total output power is split
across the 4 zones, dependant on how many
speakers are connected to each zone. It is not
possible to achieve 240W of total power output
for each zone individually.
SPEAKER ZONES (ZA240 ONLY)
The ZA240 has 4 separate terminals for 100V
speakers. The speakers connected to the terminals
labelled ZONE 1/ ZONE 2 / ZONE 3 / ZONE 4 (+)
and COM (-) are controlled by the 4 corresponding
zone switches on the front panel (e.g. a speaker
connected to ZONE 1 and COM will only work if
Zone 1 is selected on the front panel).
The ALL switch enables all zones simultaneously.
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LOW IMPEDENCE SPEAKERS
The ZA Series amplifiers also include an output for
a single 8ohm speaker. Connect the "8Ω" terminal
to the positive (+) speaker connection and "COM"
terminal to the negative (-) speaker connection.
Please ensure that the power of the connected
8ohm speaker is equal to the total output power
of the amplifier. For example, for the ZA120, which
features 120w of total output power, an 8ohm
speaker with a output power rating of 120w is
recommended.
AMPLIFIER 120w
NOTE:
- It is important to ensure that the speaker load is
no less than 8Ω and that the power handling of
the speaker is equal to or greater than the output
power of the amplifier.
- DO NOT USE 8Ω and 100V OUTPUTS AT THE
SAME TIME.
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120w