JBL 300 Operating the Subwoofer, Turning the Subwoofer on and OFF, Subwoofer Adjustments Volume

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OPERATING THE SUBWOOFER

TURNING THE SUBWOOFER ON AND OFF

Set the subwoofer’s Power Switch to the “On” position.

If the subwoofer’s Power-On Mode Switch is set to “Auto,” the subwoofer will automatically turn itself on when it receives an audio signal, and it will go into Standby mode after it has received no audio signal for 20 minutes. The subwoofer’s LED will glow green when the subwoofer is on and will glow red when the subwoofer is in Standby.

If the Power-On Mode Switch is set to “On,” the subwoofer will remain on at all times. The subwoofer’s LED will glow green.

If you will not be using the subwoofer for an extended period – for instance, if you’re going on vacation – set the Power Switch to the “Off” position.

SUBWOOFER ADJUSTMENTS: CROSSOVER CONTROL

NOTE: The Crossover Control functions only when you are using the Line-Level In L/R Connectors. The Line-Level In LFE Connector bypasses the subwoofer’s built-in crossover and the Crossover Control.

The Crossover Control adjusts the subwoofer’s built-in crossover between 50Hz and 200Hz.

The higher you set the Crossover Control, the higher in frequency the subwoofer will operate

and the more its bass will “overlap” that of the satellite speakers. This adjustment helps achieve

a smooth transition of bass frequencies between the subwoofer and the satellites for a variety of different rooms and subwoofer locations.

To set the Crossover Control, listen for the smoothness of the bass. If the bass seems too strong at certain frequencies, try a lower Crossover Control setting. If the bass seems too weak at certain frequencies, try a higher Crossover Control setting.

SUBWOOFER ADJUSTMENTS: VOLUME

Use the Subwoofer Level Control to set the subwoofer’s volume. Turn the knob clockwise to increase the subwoofer’s volume; turn the knob counterclockwise to decrease the volume. Once you have balanced the subwoofer’s volume with that of the other speakers in your system, you shouldn’t have to change it.

Notes on Setting Subwoofer Volume:

ssSometimes the ideal subwoofer volume setting for music is too loud for films, while the ideal setting for films is too quiet for

music. When setting the subwoofer volume, listen to both music and films with strong bass content and find a “middle ground” volume level that works for both.

If your subwoofer always seems too loud or too quiet, you may want to place it in a different location. Placing the subwoofer in a corner will always tend to increase its bass output, while placing it away from any walls or corners will always tend to lessen its bass output.

SUBWOOFER ADJUSTMENTS: PHASE

The Phase Switch determines whether the subwoofer driver’s piston-like action moves in and out in phase with

the satellite speakers. If the subwoofer were to play out of phase with the

satellite speakers, the sound waves from the satellites could partially cancel out the waves from the subwoofer,

reducing bass performance and sonic impact. This phenomenon depends in part on the placement of all the speakers relative to each other in the room.

Although in most cases you should leave the Phase Switch in the “Normal” position, there is no absolutely correct setting for the Phase Switch. When the subwoofer is properly in phase with the satellite speakers, the sound will be clearer and have maximum impact, and percussive sounds like drums, piano and plucked strings will sound more lifelike. The best way to set the Phase Switch is to listen to music that you know well and to set the switch in the position that gives drums and other percussive sounds maximum impact.

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Contents Included Items Thank YOU for Choosing this JBL ProductLED Subwoofer REAR-PANEL Controls and ConnectionsSurround Speakers and Subwoofer Placing the SpeakersFront Left and Right Speakers Center SpeakerSHELF-MOUNTING Speaker Mounting OptionsWALL-MOUNTING Speaker Connecting the SpeakersTo a Receiver or PREAMP/PROCESSOR with a Preamp Outputs Connecting the SubwooferOperating the Subwoofer Subwoofer Adjustments Crossover ControlSubwoofer Adjustments Volume Subwoofer Adjustments PhaseCinema 300 Center Speaker SpecificationsCinema 300 System Cinema 300 Satellite Speakers