JBL owner manual System Design Using the GTS100, Speakers

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System Design Using the GTS100

Speakers

When used in the non-bridged mode, the GTS100 can easily drive 2 ohm speaker loads. When only one speaker is connected to each channel, virtually any common speaker may be used. When two speakers are connected in parallel to a given channel, each speaker must have a minimum impedance of at least 4 ohms to ensure that the com- bined load does not drop below 2 ohms. Although the amplifier will not be dam- aged, load impedances lower than 2 ohms will eventually cause the amplifier to overheat, activating the protection circuits and causing the unit to shut off until it cools down sufficiently.

Parallel Wiring

(+)

 

 

2 Ohms

 

 

Nominal

4 Ohms

4 Ohms

Impedance

 

 

(-)

Series Wiring

(+)

4 Ohms

8Ohms Nominal Impedance

(-)

4 Ohms

 

When the GTS100 is in bridged mode, the combined impedance of the speaker (or speakers) connected to the bridged channel should be at least 4 ohms. As in the example above, sustained opera- tion of the GTS100 in bridged mode with less than 4-ohms will likely cause overheating. If monaural operation is desired, and two 4-ohm speakers are used, it is best to connect each speaker to an individual amplifier channel and use the “L+R” mode on the input-mode switch to provide monaural operation.

The GTS100 must not be used with speakers that have either one of their input terminals wired to the frame of the speaker or to the chassis of the vehicle.

Signal Sources

The low level preamp outputs of any radio/tape deck, CD player or preamp/ equalizer so equipped can drive the GTS100. The Gain control of the GTS100 is used to match the amplifier to the output voltage of the source. This matching is important to keep noise low and is explained in the Gain Adjustments section of this manual (page 20).

Thanks to Universal Interface circuitry, the GTS100 can also be connected to power amplifiers, radios or equalizers that are equipped with only speaker outputs by connecting them through the speaker level input connector. Inside the GTS100, the speaker-level and preamp-level inputs are connected through a mixing circuit, which allows them to be used simultaneously. Therefore a low level source, such as a CD player equipped with preamp

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Contents GTS100 Table Of Contents Owner’s Warranty Information RecordsIntroduction Features About InstallationRecommended for experienced professional installers only Quick StartSystem Design Using the GTS100 SpeakersTypical Applications Other ComponentsFull-Range Operation Stereo Installation Precautions Physical InstallationDamage to property Controls and Connectors Fuse 20 Amp ATC type Fuse Wiring Mounting InstructionsTypical System Configuration Cassette/CD Tuner Head UnitPower Supply Connections +12V Battery Wire YellowGround Wire Black Remote Turn-On Wire Blue with White Stripe Audio Input ConnectionsLine Level Input Connection Input-Mode Switch Speaker Level Input ConnectionsLeft + White Speaker ConnectionsSpeaker Level Input Color Codes Right + Gray Gray with Black StripeSpeaker Output Color Codes Simultaneous Stereo-Mono Connection Diagrams Satellite/SubwooferGain Adjustments Other CharacteristicsOperation Solving Noise Problems 16 volts. Check that the power wires are not reversedPage Page Maintenance Additional System Configurations for Add-On or UpgradeAdd Power to Main Speakers Add a Subwoofer ActiveAdd a Subwoofer Passive Add Power to the Rear Add a Second GTS100Add a Second Subwoofer Amplifier Front Outputs Case of Difficulty Page Specifications Metal Pins for Rem. In AMP #Part No. JBLGTS100OM
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