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8
4. If you are using outdoor horn speakers, switch on the High
Pass Filter.
5. On the rear panel of the SZ Series, turn the input Adjust fully
counterclockwise (to the “-12dB” setting). Then connect the
supplied heavy-gauge 3-pin “IEC” cable to the rear panel IEC
connector and to any grounded AC outlet.
6. Press the front panel Power switch in order to turn on the SZ
Series. The Power LED will light and the Protection LED will go
on.
After approximately five seconds, the Protection LED will go off.
7. Apply an input signal to the SZ Series at or about +4dBu
(if sending signal from a mixer, drive the output meters at
approximately 0 VU). While the input signal is present, slowly
raise the Input Adjust control until the desired sound level
is achieved. The SIGNAL and CLIP LED indicators will show
you the continuous power output of the SZ Series as signal is
being passed. For the best signal-to-noise ratio, the SZ Series
should normally be run with the Input Adjust control at or near
maximum (fully clockwise, at the “0dB” position) and the CLIP
segments should light occasionally (but not frequently) during
peak levels. If you are using a mixer that has a master output
level control, use it to attenuate the signal as necessary to
achieve the desired speaker level.
If you encounter difficulty with any aspect of setting up or using
your SZ Series, contact your local Samson dealer. If purchased in
the United States, you can call Samson Technical Support (1-800-
372-6766) between 9 AM and 5 PM EST.
Setting Up and Using Your SZ Series
Setting up your SZ Series is a simple procedure which takes
only a few minutes:
1. Remove all packing materials (save them in case of need
for future service) and decide where the amplifier is to be
physically placed—it can be used free-standing or mounted
in a standard 19” rack, requiring only two rack spaces. When
installed, make sure that both the front and rear panels are
unobstructed and that there is good ventilation around the
entire unit (we recommend the use of spacer panels, especially
if multiple amplifiers are used in a rack.
2. Make the speaker connections, using the Euroblock output
connectors on the rear panel. It is never a good idea to power
up any amplifier that is not connected to loudspeakers.
When operating using the 4 ohm output, any loudspeakers
with a minimum impedance load of 4 ohms (that is, 4 ohms
or greater) can be used. Make sure the 4 ohm terminal is
connected to the positive input of the speaker and the COM
(ground) terminal is connected to the negative input of the
speaker. For 25 volt operation, connect the positive input of the
speaker to the 25 volt terminal and connect the negative input
to the COM (ground) terminal. For 70 volt operation, connect
the positive input of the speaker to the 70 volt terminal and
connect the negative input to the COM (ground) terminal. For
100 volt operation, connect the positive input of the speaker to
the 100 volt terminal and connect the speaker's negative input
to the COM (ground) terminal. See the Output Wiring Guide on
page 13 for more information.
3. Next, make the signal input connections, using the XLR
input connectors on the rear panel. If your mixer has balanced
outputs, we recommend the use of three-conductor cabling
and connectors (unbalanced two-conductor connections
can also be used, but you’ll get better signal quality and less
outside noise and hum if you use balanced lines). See the Input
Wiring Guide on page 12 for more information.
If you are using more than one amplifier, you can use the LINK
connector to the input of the second amplifer.
INPUT
INPUT
ADJUST
-12dB 0dB
PROTECT
CLIP
-20 dB
SIGNAL
POWER
PROTECT
CLIP
-20 dB
SIGNAL
HPF
400Hz
OFF ON
LINK
12


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