Harman GTO-3EZ, GTO-5EZ Connecting the Power and Ground, Using the Connectors, Ground Connection

Connecting the Power and Ground

The GTO series 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 series 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-5EZ; minimum 8AWG – 8.4mm2 – for the GTO-3EZ) 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-5EZ
90A Fuse (GTO-5EZ)	> #8AWG (8.4mm2) Wire – GTO-3EZ
	18"
70A Fuse (GTO-3EZ)
	(46cm)

Chassis Ground (bare metal)

> #6AWG (13.2mm2) Wire – GTO-5EZ > #8AWG (8.4mm2) Wire – GTO-3EZ

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