JBL PSW-D115 setup guide Troubleshooting, If you used the high-level If there is low or no

Phase Control
0	180	Phase

Troubleshooting

If you used the high-level	If there is low (or no)	If you used the line-level
(speaker) inputs and there	bass output:	inputs and there is no sound
is no sound from any of	• Make sure the connections	from the subwoofer:
the speakers:
	to the left and right “Speaker	• Check that receiver/amplifier

The phase control determines whether the subwoofer speaker’s piston-like action moves in and out with the main speakers, 0°, or opposite the main speakers, 180°. There is no correct or incorrect set- ting. Proper phase adjustment depends on several variables such as subwoofer placement and listener position. Adjust the phase switch to maximize bass output at the listening position.

Remember, every system, room and listener is different. There are no right or wrong settings; this switch offers the added flexibility of being able to adjust your subwoofer for optimum performance for your specific listening conditions. Should you decide to fine- tune your system for optimum performance, be patient and trust your ears. It will be worth the effort involved to fully “tweak” your system.

• Check that receiver/amplifier	Inputs” have the correct	is on and a source is playing.
is on and a source is playing.	polarity (+ and –).	• Check that powered sub-
• Check that powered sub-	• Make sure that the sub-	woofer is plugged in.
woofer is plugged in.	woofer is plugged into an	• Check all wires and con-
• Check all wires and connec-	active electrical outlet.	nections between receiver/
tions between receiver/ampli-	• Adjust the crossover point.	amplifier and subwoofer. Make
fier and speakers. Make sure	• Flip the phase control switch	sure all wires are connected.
all wires are connected. Make	to the opposite position.	Make sure none of the wires
sure none of the speaker wires	• If you are using a Dolby*	are frayed, cut or punctured.
are frayed, cut or punctured.	Digital/DTS® receiver or	• Review proper operation of
• Review proper operation	processor, make sure that the	your receiver/amplifier.
of your receiver/amplifier.	subwoofer adjustments on	• Slowly turn the level
	the receiver/processor are	control clockwise until you
	set up correctly.	begin to hear the desired
	• Slowly turn the level	amount of bass.
	control clockwise until you	• Make sure that you have
	begin to hear the desired	configured your receiver/
	amount of bass.	processor so that the sub-
		woofer/LFE output is on.

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