JBL Essential Connection Guidelines for GTO Subwoofer Amplifiers

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Connecting the Power and Ground

The GTO subwoofer amplifiers are capable of delivering extremely high power levels, and require a heavy-duty and reliable connection to the vehicle’s electrical system to achieve optimal performance. Please adhere to the following instructions carefully.

Using the Connectors

GTO subwoofer amplifiers use the same type of screw terminals for power and speaker connections. This type of terminal is easy to use, provides superior current transfer and allows the easy connection of large-gauge wire.

To use the connectors, use a Phillips screwdriver to loosen the connector’s set screw, insert the bare wire and tighten the set screw to secure the wire in the connector.

Loosen

Insert

Tighten

Screw

Wire

Screw

Ground Connection

Connect a wire (minimum 6AWG – 13.2mm2 – for the GTO-1001EZ; minimum 8AWG – 8.4mm2 – for the GTO-751EZ and GTO 501EZ) 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. Use a star-type lock washer to secure the wire’s connection.

Power

Connectors

-

Audio System Head Unit

Remote Turn-On (optional)

> #18 AWG (0.82mm2) Wire

+12V

> #6AWG (13.2mm2) Wire – GTO-1001EZ

120A Fuse (GTO-1001EZ)> #8AWG (8.4mm2) Wire – GTO-751EZ/

80A Fuse (GTO-751EZ) 18"GTO-501EZ

50A Fuse (GTO-501EZ) (46cm)

Chassis Ground (bare metal)

> #6AWG (13.2mm2) Wire – GTO-1001EZ > #8AWG (8.4mm2) Wire – GTO-751EZ/

GTO-501EZ

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Contents GTO-1001EZ/ GTO-751EZ/GTO-501EZ Included Items Location and MountingConnections Auto Turn-On SwitchMounting the Amplifier Using the Connectors Connecting the Power and GroundGround Connection Power Connection Subwoofer ConnectionSetup Procedure Input ConnectionsControls Set the CrossoverSet the Gain Power/Protection LED Bass BoostTroubleshooting Problem Causes and solutionsSpecifications GTO-1001EZEnglish

GTO-751EZ, GTO-501EZ, GTO-1001EZ specifications

The JBL GTO series of amplifiers, including the GTO-1001EZ, GTO-501EZ, and GTO-751EZ, represents a compelling choice for audiophiles who seek enhanced audio performance in their vehicles. These amplifiers are designed to deliver powerful and clear sound quality, making them essential components for any high-fidelity car audio system.

The GTO-1001EZ is a monoblock amplifier that boasts a robust output of 1000 watts RMS at 2 ohms. This model utilizes JBL's latest technology, including True Power technology, which ensures consistent power delivery without distortion. The amplifier features a variable low-pass filter that allows users to tailor their bass response according to the type of music they prefer. Additionally, the GTO-1001EZ includes a remote gain control for easy adjustments from the driver’s seat.

The GTO-501EZ is a versatile five-channel amplifier capable of powering both speakers and subwoofers, making it an excellent choice for building a complete audio system. Offering 75 watts RMS per channel at 4 ohms for the speakers and a dedicated subwoofer channel with a peak power of 500 watts, this amplifier provides dynamic sound across all frequencies. It also incorporates high-level inputs, which facilitate seamless integration with factory audio systems. The GTO-501EZ features an advanced thermal management system to prevent overheating during extended use.

For those seeking even more power, the GTO-751EZ is a robust seven-channel amplifier designed to drive speakers and a subwoofer efficiently. With a total output of 900 watts RMS, this amplifier is perfect for large setups and can accommodate high-performance audio systems. It also comes equipped with a built-in DSP processor, allowing users to customize the sound field and frequency response to suit their preferences.

All three models feature JBL's special class D amplifier technology that helps to minimize size while maximizing output efficiency. The compact design makes installation in tight spaces a breeze. Additionally, these amplifiers utilize gold-plated terminals for improved connectivity and performance.

In summary, the JBL GTO-1001EZ, GTO-501EZ, and GTO-751EZ amplifiers stand out in the automotive audio landscape. With their powerful output, customizable features, and state-of-the-art technologies, they provide an excellent foundation for a high-quality car audio system, enhancing the listening experience for anyone who values exceptional sound quality on the road.