JBL ATX40, ATX60, ATX10C, ATX30, ATX100S Volume, Crossover Frequency, T R O U B L E S H O O T I N G

Volume	Subwoofer playback level can		information on fine-tuning
	be adjusted using the rear panel		Volume and Crossover
	Volume control. For detailed		Frequency, see page 6.
Subwoofer		Subwoofer
Crossover		Level

Crossover Frequency
The crossover frequency knob	Experiment with this adjustment	puts, the best result will be
determines the highest	to find the crossover frequency	obtained with the control at the
frequency your subwoofer will	that sounds best in your room.	”150 Hz“ position.
reproduce. It allows a seamless	For subwoofers used with
transition from the subwoofer	Surround Sound processors
to the satellite speakers.	with dedicated subwoofer out-

T R O U B L E S H O O T I N G
If there is no sound from any of the	center speaker is not in phantom	• Review proper operation of your
speakers:	mode.	receiver/amplifier and its surround-
• Check that receiver/amplifier is on	• If your receiver/processor is set in	sound features.
and a source is playing.	Dolby Digital or DTS® mode, make	• Make sure the movie or TV show you
• Check that the powered subwoofer is	sure the receiver/processor is con-	are watching is recorded in a sur-
plugged in, its Power switch is	figured so that the center speaker is	round-sound mode. If it is not, check
switched to the “ON” position.	enabled.	to see if your receiver/amplifier has
• Check all wires and connections		other surround modes you may use.
between receiver/amplifier and	If the system plays at low volumes but	• In Dolby Digital or DTS® modes, make
speakers. Make sure all wires are	shuts off as volume is increased:	sure your receiver/processor is con-
connected. Make sure none of the	• Check all wires and connections	figured so that the surround speakers
speaker wires are frayed, cut or	between receiver/amplifier and	are enabled.
punctured.	speakers. Make sure all wires are	• Review the operation of your DVD
• Review proper operation of your	connected. Make sure none of the	player and the jacket of your DVD to
receiver/amplifier.	speaker wires are frayed, cut or	make sure that the DVD features the
	punctured.	desired Dolby Digital or DTS® mode,
If there is no sound coming from one	• If more than one pair of main speak-	and that you have properly selected
speaker:	ers is being used, check the minimum	that mode using both the DVD play-
• Check the “Balance” control on your	impedance requirements of your	er’s menu and the DVD disc’s menu.
receiver/amplifier.	receiver/amplifier.
• Check all wires and connections	If there is low (or no) bass output:
between receiver/amplifier and
speakers. Make sure all wires are	• Make sure the connections to the left
connected. Make sure none of the	and right “Speaker Inputs” have the
speaker wires are frayed, cut or	correct polarity (+ and –).
punctured.	• Make sure the subwoofer is plugged
• In Dolby Digital or DTS® modes, make	into an active electrical outlet.
sure that the receiver/processor is	• Make sure the powered subwoofer is
configured so that the speaker in	plugged in and switched on.
question is enabled.	• In Dolby Digital or DTS® modes, make
If there is no sound from the center	sure your receiver/processor is con-
	figured so that the subwoofer and LFE
speaker:	output are enabled.
• Check all wires and connections
between receiver/amplifier and	If there is no sound from the surround
speaker. Make sure all wires are con-	speakers:
nected. Make sure none of the	• Check all wires and connections
speaker wires are frayed, cut or	between receiver/amplifier and
punctured.	speakers. Make sure all wires are
• If your receiver/processor is set in	connected. Make sure none of the
Dolby Pro Logic mode, make sure the	speaker wires are frayed, cut or
	punctured.	9