8
USING ADDITIONAL SPEAKERS
CAUTION!
ALWAYS TURN THE LONG RANGER III POWER OFF BEFORE PLUGGING IN OR
UNPLUGGING EXTERNAL SPEAKERS
In some cases, the proper coverage of an audience requires a second speaker. The optional H300 is identical to the
LONG RANGER III speaker and can be used to spread the sound over a larger area.
Another optional speaker is the ES300, a column speaker designed for high quality voice or music reproduction at
lower sound levels than the H300 mentioned above. The ES300 is ideal for many indoor applications where the
sound level from the regular horn may be excessive. The H300 and ES300 will not work well together since the H300
is so much louder than the ES300.
The output jacks for the optional speakers are located on the LONG RANGER III front panel. The left and right jacks
operate differently. The right jack does not disconnect the built-in speaker when a speaker is plugged into it. This
means that the built-in speaker and the auxiliary speaker will both operate together. The left output jack disconnects
the built-in speaker and powers only the external speaker. Internal circuits and switching networks keep track of the
number of speakers hooked up and select the amplifier impedance so that the full power of the amplifier is always
available. It is important that you use only an 8 Ohm speaker in these jacks. If you are not using Lectrosonics
extension speakers, check the speaker for the proper rating before connecting to the LONG RANGER III.
The H300 speaker is typically used in conjunction with the built-in speaker to increase sound coverage. This is done
by plugging the H300 into the right speaker jack. The ES300 column speaker, on the other hand, will not be nearly as
loud as the built in horn, so it is normally used by itself, plugged into the left jack on the LONG RANGER III front
panel.
When using two external speakers simultaneously, the built-in speaker will be automatically disconnected to prevent
overload of the amplifier.
In a large area, such as a football field, try to arrange the speakers so that the listeners are not in the direct sound
field of both speakers. If a listener can hear two speakers located at different distances, a distracting “echo effect”
occurs. Put them together on the in a central location and aim them in opposite directions.
ADDING A SECOND WIRELESS CHANNEL TO YOUR LONG RANGER III
A very popular feature of the LONG RANGER III is the ability to add a second wireless channel to an existing system
in the field. The Lectrosonics Add-On Receiver system was expressly designed for that purpose. The standard
system consists of an Add-On receiver, an M175 transmitter and a microphone.
The Add-On receiver is supplied with velcro attaching strips and is equipped with the necessary cabling for making
the connections to the LONG RANGER III. The receiver is installed on the LONG RANGER III by performing the
following steps as shown in Figure 4:
1)
The antenna cable for the Add-On is packed together with screws, lock washers and the velcro strips. The an-
tenna cable is terminated with two ring lugs. Feed the lug end of this cable through the hole in the LONG
RANGER III rear panel upright. Dress the cable along the top of the battery pack along with the speaker wires as
shown in Figure 4.
