JBL GX-A604 Owner's Manual

Also see for GX-A3001: Specifications Owner's manual Service manual

Contents

JBL GX-A604 Owner's Manual Manual pdf 20 page image

2020SET THE CROSSOVER CONTROLSGX-A604: 4-CHANNEL OPERATIONInput Mode switch: Set the Input Mode switch in the "4CH" position.Front Crossover Filter switch: Set the Front Crossover Filter switch in the “ON” (high-pass) position. This will limit the amount of low-frequencyenergy sent to the speakers, significantly reducing distortion and preventing the speakers from damage. Exception: If you have connected large full-range speakers (6" x 9" or larger) that can handle significant bass to the amplifier's front channels and you are not using a subwoofer in the system,set the Front Crossover Filter switch to the "OFF' (full-range) position.Rear Crossover Filter switch: Set the Rear Crossover Filter switch in the “HP” (high-pass) position. This will limit the amount of low-frequencyenergy sent to the speakers, significantly reducing distortion and preventing the speakers from damage. Exception: If you have connected large full-range speakers (6" x 9" or larger) that can handle significant bass to the amplifier's front channels and you are not using a subwoofer in the system,set the Rear Crossover Filter switch to the "FLAT' (full-range) position.Rear Crossover control: When the Rear Crossover switch is set inthe "HP" position, the Rear Crossover control determines the frequencywhere the low frequencies sent to the speakers begin to be reduced involume.When running the amplifier in the 4-channel mode you should set theRear Crossover control according to the size of the speakers connectedto the amplifier channels – the smaller the speakers the higher youneed to set the control to protect the speakers from damage. Afterinitially setting the crossover frequency, listen to music with strong bassthat you are familiar with. If the speakers sound distorted or distressed, move the crossover frequency control to a higher setting to eliminate thedistortion/ distress. The illustration to the right shows the recommended crossover filter frequency ranges for different speaker sizes.GX-A604: 3-CHANNEL OPERATIONInput Mode switch: Set the Input Mode switch in the "4CH" position.Front Crossover switch: Set the Front Crossover switch in the “ON” (high-pass) position. This will limit theamount of low-frequency energy sent to the speakers, significantly reducing distortion and preventing thespeakers from damage.Rear Crossover Filter switch: When connecting a subwoofer or woofer to the rear channels, set the RearCrossover Filter switch in the “LP” (low-pass) position. This will limit the amount of high-frequency energy sentto the woofers or subwoofer, improving the clarity of vocals and other midrange sounds.6" and 5" Speakers 4" and Smaller SpeakersLow-Pass Operation:Subwoofers and Woofers