JBL E250P, E150P manual Operation, Power, Level Control, Crossover Adjustments, Northridge E Series

OPERATION

Power

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.

Level Control

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

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-

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.

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.

Crossover Adjustments

LEVEL

Min	Max
LFE	NORMAL
PHASE 0º	180º

CROSSOVER
FREQUENCY
	50Hz	150Hz
	L	R
LINE LEVEL IN
	For LFE use L or R
		L
		HIGH
		LEVEL
		IN
+	–	R
ON	OFF	120V
POWER
		60Hz

Northridge E Series

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

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.

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