www.jbl.comEnglish2323SET THE BASS BOOSTGX-A604: When you’re using the amplifier’s rear channels to power a subwoofer, the Bass Boost switch can provide 12dB of bass boost at 45Hz.(The switch only affects the amplifier's rear channels.) Set this switch according to your personal taste, but if using it causes audible distortion orbottoming of your subwoofer we recommend setting it to "OFF." CAUTION: Only use the Bass Boost switch if you’ve configured the rear channelsto power a subwoofer. Using the Bass Boost switch with full-range speakers can damage the speakers.GX-A602: When you’re using the amplifier in bridged mode to power a subwoofer, the Bass Boost switch can provide 12dB of bass boost at 45Hz.(Set this switch according to your personal taste, but if using it causes audible distortion or bottoming of your subwoofer we recommend setting itto "OFF." CAUTION: Only use the Bass Boost switch if you're using the amplifier to power a subwoofer. Using the Bass Boost switch with full-rangespeakers can damage the speakers.GX-A3001: The Bass Boost control can provide up to 12dB of bass boost at 45Hz. Set this control according to your personal taste, but be carefulnot to set the control at a high enough level to cause audible distortion or bottoming of your subwoofer.POWER AND PROTECTION LEDSPOWER LED• LED Illuminates orange: Normal operation (power is on).• LED is off: Amplifier is in standby mode.PROTECTION LEDThe amplifier's Protection LED should remain off during normal operation. If there is no sound from the amplifier and the Protection LED illuminatesred, see Troubleshooting, on page 13.