JBL GTS100 manual

GTS100 GTS100 2/1 CHANNEL AUTOMOTIVE POWER AMPLIFIER OWNER’S MANUAL JBL 1394 Manual 7/17/98 11:49 AM Page 1[...]

T able Of Contents Introduction ..................................................................................................3 Features .......................................................................................................4 About Installation .....................................................................................[...]

Introduction Thanks for purchasing your new GT series automotive amplifier. The GT series amplifier you have chosen includes many unique features to enhance its performance and utility. The power amplifier circuitry is a fully discrete design notable for low distortion and unusually clean and clear reproduction quality. Your GT series amplifier wil[...]

4 Features • Bridgeable 2/1 Channel Operation • Simultaneous Stereo + Mono Operation • Built-in Staggered 18dB/Octave 100Hz High-Pass and 80Hz Low-Pass Crossover • No Current Limiting • Oversized Floating Rail MOSFET Switch-Mode Power Supply • Common Sense 2-way Turn-On • Stealth Remote Silent Turn-On Circuitry with Power-On Indicator[...]

5 5. Connect the outputs from the signal source to the appropriate inputs of the amplifier according to the Wiring Diagram (page 13) with either high quality low-level signal cables with RCA plugs, with the supplied Speaker-level input connector, or both. 6. Connect the speakers to the ampli- fier according to the wiring diagram on page 13. 7. Turn[...]

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 ens[...]

7 controls (Volume, Balance, Bass, Treble) may be connected to the pre- amp-level inputs at the same time as a powered radio/tape unit is connected to the speaker-level inputs. This provides a higher performance alternative to an FM Modulator connection when you wish to add CD capability to a factory installed cassette radio. Switching from one sou[...]

8 L– L+ – + L– R+ – + R– R+ – + R– R+ – + L– R+ – + L– L+ – + L R LR R L– R+ – + GTS 100 GTS 100 4-Ohm Full-Range Speaker or Subwoofer 4-Ohm Full-Range Speaker or Subwoofer Application 2 Bridge-Mode Operation Single Amplifier: Subwoofer-Operation (Mono) Main speakers are driven by head unit or additional amplifier. Pream[...]

9 Installation Precautions Before beginning the installation of the amplifier, read the following precautions carefully. Failure to heed these warn- ings could result in personal injury or damage to property . • The GTS 100 should be installed only in vehicles that have 12-volt negative ground electrical systems. Connection to other types of elec[...]

• The GTS100 must be mounted in a place where air can circulate around the fins on the chassis. Good air circulation around the amplifier will make it operate at lower tempera- tures and reduce the chance of the thermal protection circuits being trig- gered. The installation positions that provide the most efficient air circula- tion around the a[...]

11 POWER Power Indicator L R LINE IN OUT NOM MIN MAX GAIN INPUT MODE STEREO CROSSOVER OFF HIGH RL + R LOW + R - + L - + R - + L - SPEAKER OUTPUTS SPEAKER INPUTS BRIDGED FUSE 20A POWER BAT(+) REM GND ➀ Line Level RCA Inputs ➁ Line Selector ➂ Gain Control ➃ Input Mode ➄ Speaker Input Connector ➅ Crossover Mode Selector 20A Power Connector[...]

Mounting Instructions Place the amplifier in the installation location. Use a pen or pencil to mark the four mounting screw hole locations. Set the amplifier aside and drill the holes for the mounting screws. (Note: If the surface you are mounting the amp to is covered with carpeting or uphol- stery, cut a small “x” in the material at each scre[...]

13 Cassette/CD Tuner (Head Unit) CD Player or Changer CD Input Cassette/CD Preamp Output Antenna Input Power Antenna Power Antenna Relay Blue w/White Stripe - Remote On/Off Yellow Main +12V Black - Power Ground Chassis Ground Vehicle Battery – + Ignition Switch Antenna Motor Ground Power Supply Blue (Blue/White) Remote On/Off Remote Antenna Black[...]

Power Supply Connections The power input and remote turn-on wires are connected to the GTS100 via the power connector on the end of the amplifier. Use the included wire harness for connections. In some cases, such as a custom competition installation, you may wish to make your own custom power harness. The part number of the mating connector and te[...]

wire for all grounding, even signal processors and head units, can also help to minimize possible noise pickup. Remote Turn-On Wire (Blue with White Stripe) Because the JBL GTS100 includes Common Sense 2-way turn-on circuitry, you have two options for remotely activating the amplifier. When using the speaker level inputs with a head unit that inclu[...]

outboard crossover, use the “R” mode and connect your source input to the right channel input. Simultaneous Stereo + Mono – For this connection, the Input Mode switch is left in the stereo position. Main speakers are connected normally to the left and right stereo outputs, and a center- channel or subwoofer speaker is con- nected in bridged m[...]

Speaker Level Input Color Codes Left (+): White Left (-): White with Black Stripe Right (+): Gray Right (-): Gray with Black Stripe Using Both the Speaker Level Input and Line Level Input Together In some systems it may be desirable to use both the speaker level inputs and line level inputs simultaneously. For instance, if you have a stock head uni[...]

same time. This is sometimes used for center-channel applications or for inex- pensive subwoofer addition, essentially creating a 3-channel system. However, unlike a true bi-amplified subwoofer connection, this system configuration does not provide for control of sub- woofer-satellite balance, it requires the use of a passive subwoofer crossover in[...]

19 L R LINE IN OUT NOM MIN MAX GAIN INPUT MODE STEREO CROSSOVER OFF HIGH RL + R LOW + R - + L - + R - + L - SPEAKER OUTPUTS SPEAKER INPUTS BRIDGED FUSE 20A POWER GND BAT(+) REM (+) (+) (–) (–) (+) (–) CC L Subwoofer (Low Pass) Tweeter/Midrange Satellites (High Pass) High Pass Satellite Crossover Frequency: 100Hz C: 300 µ F Capacitor 100V, No[...]

carefully to the system output, adjust the volume control of the radio/tape deck to the point where you first begin to hear audible distortion. Reduce the level just to the point where the distor- tion goes away. This is the maximum undistorted output level of your head unit and signal processors, and should not be exceeded during use. If audible d[...]

and 16 volts. Check that the power wires are not reversed. If the GTS100 is operated at very high power levels in a high ambient tempera- ture situation, the unit may not be able to radiate all the heat generated by such operation. If the temperature of the amplifier reaches a level that could cause damage, the thermal overload protection circuit w[...]

the amplifiers and signal processors are all grounded to the same point on the chassis. Usually the head unit does not need to be grounded to the same point as the rest of the system, but in some instances grounding the head unit to the same point will also help. If this does not adequately reduce the noise level, try another ground point on the ca[...]

must cross, they should cross at right angles. If you suspect that power line noise is being induced in the signal leads, you can repeat the test for source noise described previously, but perform the test at the amplifier end of the signal cables. Other Noise Sources – Common noise problems will be solved by proper grounding and power supply con[...]

Additional System Configurations for Add-On or Upgrade The features and capabilities of the GTS100 provide tremendous system design flexibility. The diagrams on the following pages illustrate some of the system possibilities. They are in order of increasing complexity, showing the way a system may be upgraded in logical steps. Although the systems [...]

25 R– R+ – + L– L+ – + GTS 100 L– L+ – + R– R+ – + GTS100 Front Outputs Rear Outputs Front Full-Range Speakers Rear Full-Range Speakers System 1 Add Power to Main Speakers Add a GTS100 to the main (usually front) outputs of an existing head unit. Secondary speakers (usually rear-fill) connect to the head unit's internal amplifi[...]

26 L– L+ – + R– R+ – + GTS 100 GTS 100 L– L+ – + R– R+ – + + – Front Outputs Rear Outputs Front Satellite Speakers Preamp output to preamp input Rear Full-Range Speakers System 3 Add a Second GTS100 1 or 2 Subwoofers GTS100 GTS100 L– L+ – + R– R+ – + GTS 100 GTS 100 GTS 100 L– L+ – + R– R+ – + + – Front Outputs R[...]

27 In Case of Difficulty Power-on light does not come on. • Head unit not on; turn the head unit on. • Ground wire is disconnected or defective; check for continuity with an ohmmeter between the GTS100’s ground terminal and a known chassis ground point. • Battery wire is disconnected or defective; check for approximately +12 volts between t[...]

28 (continued) Remote-on light is illuminated, but no • Incorrect gain adjustment; verify that sound is heard from some or all of the the GTS100 gain controls are not speakers. turned completely down. If they are, sound output level may be very low and may give the impression that the system (or part of the system) is dead. • Defective head uni[...]

29 Specifications Continuous Power Output 35 watts x 2 (20Hz – 20kHz, (4 Ohms, 0.05% THD) 14.4V Battery Voltage) 50 watts x 2 (2 Ohms, 0.08% THD) 100 Watts x 1 (4 Ohms, 0.08% THD) Signal to Noise Ratio 100dBA Frequency Response 10Hz – 50kHz (+0, – 1dB) 20Hz – 20kHz (+0, – 0.1dB) Damping Factor >200 Slew Factor >5 Line Level Input Se[...]

JBL Consumer Products, Inc. 80 Crossways Park West Woodbury, NY 11797 8500 Balboa Blvd. Northridge, CA 91329 800 336 4JBL Part No. JBLGTS100OM A Harman International Company JBL 1394 Manual 7/17/98 11:49 AM Page 32[...]