• When making electrical connections, make sure they are secure and properly insulated. • If you must replace any of the GTO-804EZ/GTO-504EZ’s fuses, be sure to use the same type of fuse and current rating as that of the original.
If your audio system’s source unit includes a remote turn-on wire and you would prefer to use it, the amplifier will sense that you’ve used a remote turn-on wire and that connection will override the signal-sensing turn-on. If necessary, you can defeat the signal-sensing turn-on circuit by moving the Auto Turn-On switch to the “Off” position. www.jbl.com...
Connect a wire (minimum 8AWG – 8.4mm – for the GTO-804EZ; minimum 10AWG – 5.3mm – for the GTO-504EZ) from the amplifier’s GND terminal directly to a solid point on the vehicle’s chassis. For a good connection, use sandpaper to clear the paint from the metal surface at this chassis location.
GTO-504EZ) directly to the battery’s positive (+) terminal. 2. Install a fuse holder for a 50A fuse (GTO-804EZ) or 40A fuse (GTO-504EZ) on this wire within 18" (46cm) of the battery’s (+) terminal. Do not install the fuse in the holder at this time.
See Connecting the Inputs, on page 7, for information about connecting the inputs for bridged operation. input cOnnectiOns The GTO-804EZ and GTO-504EZ amplifiers have multiple input connectors with a routing switch that increases flexibility, so you can use these amps in a variety of audio system configurations.
Aux Outputs Subwoofer GTO-804EZ/ Amplifier GTO-504EZ The Aux Out connectors are fed by both the GTO-804EZ/GTO-504EZ’s front and rear inputs, so the subwoofer amp will receive an input signal regardless of how the source unit's fader control is set. www.jbl.com...
seTuP PrOcedure GTO series amplifiers include a setup CD with test signals that makes it easy to precisely set the amplifier’s input gain to maximize the amplifier’s signal-to-noise and dynamic range performance with your vehicle’s audio system. The amplifiers feature three Gain Indicator LEDs that provide all the feedback you need to quickly set the gain to the proper level. cOntrOls Before setting the amplifier controls: Confirm that all connections have been correctly made, reconnect the vehicle’s negative (–) battery terminal and turn the audio system on.
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1. Initially set the amplifier Input Level switch to the “Hi1” position. nOte: If you have connected the GTO-804EZ or GTO-504EZ amplifier to your factory audio system’s speaker outputs, the audio system may show a “speaker disconnected” message, or may fail to play with an amplifier connected to its output.
Bass BOOst When you’re using the amplifier’s rear channels to power a subwoofer, the Bass Boost control can provide up to 12dB of bass boost at 45Hz. Set this control according to your personal taste, but be careful not to set the control at a high enough level to cause audible distortion or bottoming of your subwoofer.
TrOubleshOOTinG If your amplifier isn’t performing the way you think it should, check to see if the problem is covered in this section before calling your dealer or contacting JBL customer service. prOBlem causes and sOluTiOns No sound (the amplifier’s •...
Number of Channels: Power Output (CEA 2006A): 80W RMS x 4 channels at 4 ohms, 14.4V DC, <1.0% THD 100W RMS x 4 channels at 2 ohms, 14.4V DC, <1.0% THD 200W RMS x 2 channels bridged at 4 ohms, 14.4V DC, <1.0% THD Max Power: 940W: 235W x 4 channels at 2 ohms (1kHz), 15.5V DC, 10% THD...