JBL S120PII service manual E R a T I O N

S120PII Studio Series

O P E R A T I O N

Power

The S120PII is equipped with both a master Power switch

‚and an Auto turn-on/turn- off switch £. In order to function, the S120PII must be plugged into an active electrical outlet (but not an accessories outlet on another component of your audio system such as a receiver), and the master Power switch

‚must be turned on

(the “•” position).

The Auto turn-on/turn-off switch £ has three positions: On The subwoofer is on at

all times and ready to play program material.

Level Control

The subwoofer Level Control

∞adjusts the volume of the subwoofer relative to the rest of the system. Proper level adjustment depends on several variables such as

Auto As long as no audio signal is received, the subwoofer is in Standby mode to conserve power, indicated by the red color of the LEDs on the front of the unit. When an audio signal is sensed, the subwoofer will switch itself into the fully On mode and begin playing the program material. The LEDs will turn green. When a period of about twenty minutes goes by during which no signal is sensed, the S120PII will

room size, subwoofer placement, type of main speakers and listener position. Adjust the subwoofer level so that the volume of the bass information is pleasing to you.

return to Standby mode, indicated by the LEDs turning red.

Off The subwoofer is off at all times, even if an audio signal is present at its inputs.

If you plan to be away for an extended time, or if the subwoofer will not be used, you may wish to turn off the master Power switch ‚.

When using a Dolby Digital/ DTS receiver, adjust the LFE level on the receiver to 0dB, and then adjust the subwoofer Level Control ∞ for the desired amount of bass.

Crossover Adjustments

The Crossover Frequency Control ¢ determines the highest frequency at which the subwoofer reproduces sounds. If your main speakers can comfortably reproduce some low-frequency sounds, set this control ¢ to a lower frequency setting, between 50Hz – 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 frequencies, set the low-pass Crossover control ¢ to a higher setting,

between 120Hz – 150Hz. This control ¢ is not used when

¡ ™ £

		180°	LFE	ON
	PHASE			AUTO
		0°	NORMAL	OFF
		80Hz
¢	CROSSOVER				LEVEL
	FREQUENCY
∞	50Hz	150Hz	MIN	MAX
§	BASSQ				LINE
					LEVEL IN
	(See owner’s				(For LFE
	manual	IN	OUT	R	use R or L)
¶	before use)				L
				L
•					HIGH
					LEVEL
					IN
				R
		+	–
				L
ª					HIGH
					LEVEL
					OUT
				R

7

the LFE switch ™ is in the “LFE” position.

S120PII

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,

DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.

AVERTISSEMENT: POUR PRÉVENIR LES RISQUES D’INCENDIE OU

DE CHOC ÉLECTRIQUE ÉVITER D’EXPOSER CET APPAREIL A LA

PLUIE OU A L’HUMIDITÉ.

ON

‚

OFF