Manual JBL Studio SUB 250P (page 4 of 4) (English)

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HARMAN International Industries, Inc.

8500 Balboa Boulevard, Northridge, CA 91329 USA

TURNING THE SUBWOOFER ON AND OFF

Set the subwoofer’s Power switch to the ‘On’ position. Now set the

subwoofer’s Power On Mode to the ‘Auto’ position. 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 approximately

10 minutes. The subwoofer’s LED will glow green when the subwoofer is

on and will glow red when the subwoofer is in Standby.

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

The Crossover control adjusts the subwoofer’s built-in low-pass ﬁlter

crossover between 50Hz and 150Hz. 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 speakers. This adjustment

helps achieve a smooth transition of bass frequencies between the

subwoofer and the speakers 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 Level control to set the subwoofer’s volume. Turn the knob

clockwise to increase the subwoofer’s volume; turn the knob

counterclock-wise 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 the Level control setting.

Notes on Setting Subwoofer Volume:

• Sometimes 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

tend to increase its bass output, while placing it away from any walls or

corners will 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 speakers. If the subwoofer

were to play out of phase with the speakers, the sound waves from the

speakers 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 speakers, the

sound will be clearer and have maximum impact, and percussive sounds

like drums, piano and plucked strings will sound more life-like. 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.

USING THE SUPPLIED CARPET SPIKES

Four metal spikes are supplied for use when you place the subwoofer on

a carpeted surface. Do not use these spikes when placing subwoofer on

non-carpeted surfaces.

To insert the spikes:

1. Gently lay the subwoofer on its side (not its front or back) on a soft,

nonabrasive surface.

2. Screw each spike into the threaded insert in each foot. Make sure all

four spikes are screwed in completely for stability.

Note: NEVER drag the subwoofer to move it. Always carefully lift the

subwoofer and carry it to its new location.

JBL is a trademark of HARMAN International Industries, Incorporated, registered in the United States and/or other countries.

PolyPlas is a trademark of HARMAN International Industries, Incorporated.

Featu

res, speciﬁcations and appearance are subject to change without notice.

Part No. 950-0501-001

www.jbl.com

OPERATING THE SUBWOOFER

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JBL Studio SUB 250P Manual

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