IEC GLI - Audio accessory Rockford Fosgate - Free user manual and instructions

Product Type	Ground Loop Isolator / RCA Filter
Brand	Rockford Fosgate
Model	IEC GLI
Signal Gain	1.3 dB
Transformer Ratio	1:1
Primary Impedance	1100 ohms @ 1 kHz
Secondary Impedance	750 ohms @ 1 kHz
Input Voltage (Test)	1.0 V
Output Voltage (100k ohm load)	1.14 V @ 1 kHz
Output Voltage (600 ohm load)	735 mV @ 1 kHz
Input Connector	RCA plugs (male)
Output Connector	RCA jacks (female)
Ground Wire	Brown wire (use only if no sound on both channels)
Dimensions (Approx.)	2.0 x 1.0 x 0.5 inches
Weight (Approx.)	2 oz
Power Requirement	Passive (no external power needed)
Installation	Connects between source unit and amplifier
Maintenance	Wipe with dry cloth; avoid moisture
Safety	Low voltage device; no electrical hazard
Spare Parts / Repairability	Not user-serviceable; replace unit if faulty

Frequently Asked Questions - IEC GLI Rockford Fosgate

What does the IEC GLI do?

The IEC GLI is a ground loop isolator that eliminates engine noise (alternator whine) from car audio systems while providing a 1.3 dB signal gain.

How do I install the IEC GLI?

Connect the RCA plugs (male) to your source unit's RCA outputs. Then connect your amplifier's RCA inputs to the RCA jacks (female) on the IEC GLI. The brown ground wires are typically not used unless no sound is heard.

When should I use the brown ground wires?

Use the brown ground wires only if no sound is audible on both channels. Attach them to the source unit's ground.

Does the IEC GLI require external power?

No, the IEC GLI is a passive device and does not need any external power supply.

What is the signal gain of the IEC GLI?

It provides a 1.3 dB signal gain, which can help improve performance in some setups.

Will the IEC GLI work with any car stereo?

Yes, it works with any car stereo that has RCA outputs and is designed to eliminate ground loop noise.

Can I use the IEC GLI to fix humming noise?

Yes, it is specifically designed to eliminate engine noise caused by ground loops, which often manifests as a whine or hum.

What are the dimensions of the IEC GLI?

Approximate dimensions are 2.0 x 1.0 x 0.5 inches (51 x 25 x 13 mm), making it compact for easy mounting.

Is the IEC GLI repairable?

The unit is not user-serviceable. If it fails, it should be replaced.

What is the model number of this isolator?

The model number is IEC GLI, manufactured by Rockford Fosgate.

USER MANUAL IEC GLI Rockford Fosgate

The IEC GLI RCA filter creates 1.3 db signal gain for improved performance as well as eliminating engine noise caused by a ground loop. The RCA plugs (male) are the input to the IEC GLI and must be plugged into the source unit. The red RCA plug is the right channel and the white RCA plug is the left channel. The RCA jacks are the output for the IEC GLI. The brown wires are not usually used. The brown ground wires are to be used only if no sound is audible on both channels. Attach the brown wires to the source unit's ground.

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Testing

Transformer: 1:1 Primary = 1100 ohms Secondary = 750 ohms @1kHz with 40 gauge wire.

Voltage in = 1.0 volts

Voltage out = 1.14volts w/ 100k ohm load @ 1 kHz Voltage out = 735mVolts w/ 600 ohm load @ 1 kHz No load Voltage out =

RCA CABLE LEFT SIDE "INPUT"

RCA JACK RIGHTSIDE "OUTPUT"