JBL LSR305 Owner's Manual - page 6
7
Audio Connections
The 3 Series Speakers are equipped with balanced XLR and 6 mm (¼") TRS inputs for connection to professional
computer audio interfaces, mixing consoles and audio production equipment as well as unbalanced consumer
audio products including personal music players, consumer audio receivers and audio visual equipment. Connect
professional equipment with balanced outputs to the XLR or 6 mm (¼") TRS input of the speaker using balanced
signal cables.
3-Series speakers are equipped with an INPUT SENSITIVITY SWITCH. The switch is set to the -10dB setting
when it ships from our factory. This setting will be best for many applications. However, you can set the switch to
the +4 dB setting:
•When connecting 3 Series speakers to professional equipment with +4 dB nominal output level, set
the INPUT SENSITIVITY SWITCH to the +4 dB setting. To determine the nominal output level of the
connected equipment, consult the documentation supplied with the connected equipment.
•If you notice the sound is distorted, or you find it is too loud, set this switch to the +4 dB setting.
Power Connections
The 3 Series speakers incorporate a universal power supply allowing these to be used domestically and
internationally. The ground terminal of the IEC plug is required by wiring codes and regulations and must always
be connected to the electrical installation safety ground.
Making Sound
After connections are made, reduce the output level of the audio source (mixing console, computer recording
system, or preamp) to minimum. Set the 3 Series POWER SWITCH to the “ON position.” After a short delay the
POWER INDICATOR on the front of each speaker will illuminate and the speakers will be ready to reproduce
audio signals. Power on connected audio equipment. Slowly advance the volume control of connected audio
equipment to achieve a suitable listening level, and enjoy.
30º
30º
Place the speakers so the distance "D" between
the speakers is the same as the distance to the
listening position.
D
D
D