JBL Northridge E-Series E150P Service Manual - Operation

OPERATION

When the unit is plugged in

and the power switch is on

and no signal is received, the

LED on the top of the unit will

turn red. When a signal is

present, the LED will turn

green.

Note: It will take several min-

utes for the LED to turn from

green to red after the input

signal to the subwoofer is

removed. Due to JBL’s unique

high-output, high-efficiency

amplifier design, power con-

sumption is minimal when the

subwoofer is not receiving a

signal. Of course, the sub-

woofer can be turned off,

whenever desired, if you do

not wish to leave it in auto

(standby) mode.

The subwoofer Level Control

adjusts the volume of the 

subwoofer relative to the rest

of the system. Proper level

adjustment depends on sev-

eral variables such as room

size, subwoofer placement,

type of main speakers and 

position. Adjust the subwoofer

level so that the volume of the

bass information is pleasing 

to you.

Crossover Adjustments

The Crossover Frequency

Control determines the highest

frequency at which the sub-

woofer reproduces sounds. If

your main speakers can com-

fortably reproduce some low-

frequency sounds, set this

control to a lower frequency

setting, between 50Hz and

100Hz. This will concentrate

the subwoofer’s efforts on the

ultradeep bass sounds

required by today’s films and

music. If you are using smaller

bookshelf speakers that do not

extend to the lower bass fre-

quencies, set the low-pass

crossover control to a higher

setting, between 120Hz and

150Hz. This control is not used

when the LFE switch is in the

“LFE” position.

CROSSOVER

FREQUENCY

LEVEL

LINE LEVEL IN

PHASE

Min

Max

L

R

L             R

For LFE use L or R

LFE                NORMAL

Northridge E Series

HIGH

LEVEL

IN

POWER

+    –

120V

60Hz

50Hz

0º

180º

150Hz

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

ON

OFF

E150P 

7

Power

Level Control