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JBL 1394 Manual 7/17/98 11:49 AM Page 1
GTS100
2/1 CHANNEL AUTOMOTIVE POWER AMPLIFIER
OWNER’S MANUAL
GTS100
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JBL 1394 Manual 7/17/98 11:49 AM Page 2 Table Of Contents Introduction ..................................................................................................3 Features.......................................................................................................4 About Installation .........................................................................................4 Quick Start ............................................................................................
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JBL 1394 Manual 7/17/98 11:49 AM Page 3 Introduction Thanks for purchasing your new By providing this two-unit direct connec- GT series automotive amplifier. The tion, Universal Interface circuitry elimi- GT series amplifier you have chosen nates the need for an FM modulator to includes many unique features to connect a CD player to factory radios, enhance its performance and utility. improving the fidelity of digital playback. The power amplifier circuitry is a Also, when using a high-power
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JBL 1394 Manual 7/17/98 11:49 AM Page 4 Features About Installation Although the GTS100 was designed to • Bridgeable 2/1 Channel Operation make installation as easy as possible, it is a sophisticated product that requires • Simultaneous Stereo + Mono proper installation to realize its full per- Operation formance potential. Skill with tools, an understanding of basic electronics, and • Built-in Staggered 18dB/Octave experience with car stereo installation 100Hz High-Pass and 80Hz Low-Pass are
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JBL 1394 Manual 7/17/98 11:49 AM Page 5 5. Connect the outputs from the signal Quick Start source to the appropriate inputs of Recommended for experienced the amplifier according to the Wiring professional installers only! Diagram (page 13) with either high 1. Disconnect the negative cable from quality low-level signal cables with the battery. Note: If the vehicle’s RCA plugs, with the supplied radio features a code type security Speaker-level input connector, or system, make certain you kno
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JBL 1394 Manual 7/17/98 11:49 AM Page 6 When the GTS100 is in bridged mode, System Design Using the the combined impedance of the speaker GTS100 (or speakers) connected to the bridged Speakers channel should be at least 4 ohms. As When used in the non-bridged mode, in the example above, sustained opera- the GTS100 can easily drive 2 ohm tion of the GTS100 in bridged mode speaker loads. When only one speaker with less than 4-ohms will likely cause is connected to each channel, virtually overhea
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GTS 100 JBL 1394 Manual 7/17/98 11:49 AM Page 7 controls (Volume, Balance, Bass, Other Components Treble) may be connected to the pre- The system options of the GTS100 amp-level inputs at the same time as a are numerous. All JBL amplifiers are powered radio/tape unit is connected to designed with sufficient adjustment the speaker-level inputs. This provides range to match with the accepted “nor- a higher performance alternative to an mal” voltages and impedances used by FM Modulator connecti
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GTS 100 GTS 100 GTS 100 GTS 100 GTS 100 GTS 100 JBL 1394 Manual 7/17/98 11:49 AM Page 8 Application 2 Bridge-Mode Operation R Preamp or L Speaker Level Single Amplifier: Subwoofer-Operation (Mono) Amp Crossover Input Mode Line For Dual-Amplifier For Single Amplifier Switch Switch Switch Full-Range or Subwoofer Use Subwoofer Use B Low L + R In R LR Main speakers are driven by head unit or additional amplifier. Dual Amplifier: GTS100 GTS100 A B Subwoofer-operation (Stereo) Amp C
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JBL 1394 Manual 7/17/98 11:49 AM Page 9 wires, hydraulic brake lines, fuel Installation Precautions lines, or fuel tanks that may be dam- Before beginning the installation of the aged while doing so. Such compo- amplifier, read the following precautions nents may be hidden within double carefully. Failure to heed these warn- walled panels or structural mem- ings could result in personal injury or bers of the vehicle, so be extremely damage to property. cautious. • The GTS 100 should be instal
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JBL 1394 Manual 7/17/98 11:49 AM Page 10 Controls and Connectors • The GTS100 must be mounted in a place where air can circulate around 1. Line Level RCA Inputs – Use these the fins on the chassis. Good air connectors for line (preamp) level input circulation around the amplifier will to the amplifier. When speaker inputs make it operate at lower tempera- are used, this connector can be con- tures and reduce the chance of the verted for use as a line-level output by thermal protection circui
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JBL 1394 Manual 7/17/98 11:49 AM Page 11 LINE INPUT MODE SPEAKER CROSSOVER SPEAKER IN OUT RL+R INPUTS OFF HIGH OUTPUTS FUSE 20A NOM + + + + 20A R L L R L STEREO LOW BAT(+) REM GND - - - - MIN MAX GAIN POWER R BRIDGED ˘ Fuse Line Level RCA Inputs ˙ Battery Ground ` Line Selector ´ Gain Control Power ¨ Remote Turn-On Connector ˆ Input Mode ˜ Speaker Input Connector Battery (+) In ¯ Crossover Mode Selector 11 Speaker Output Connector POWER Power Indicator on page 14 and the wiring
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JBL 1394 Manual 7/17/98 11:49 AM Page 12 Mounting Instructions Wiring Proper wiring of the GTS100 and the associated components is extremely Place the amplifier in the installation important for proper performance and location. Use a pen or pencil to mark long term reliability. Using the proper the four mounting screw hole locations. type of wire is very important. If a spe- Set the amplifier aside and drill the cific type of wire should be used for a holes for the mounting screws. (Note: If c
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A S U E H T JBL 1394 Manual 7/17/98 11:49 AM Page 13 Typical System Configuration Cassette/CD Tuner Speaker Level Output Connection (Use only when line level ouput is not available) Cassette/CD Tuner CD Player (Head Unit) or Changer Antenna Input CD Input Power Cassette/Receiver Antenna Power Supply Wires Cassette/CD Preamp Output Power Amplifier Power Antenna Connection Relay GT S100 POWER Amplifier Speaker Level Amplifier Input Speaker Output Connection + Speakers Blue w/White Stripe - Rem
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JBL 1394 Manual 7/17/98 11:49 AM Page 14 Ground Wire (Black) Power Supply Connections • Proper grounding is extremely impor- tant. It has a significant effect on the The power input and remote turn-on overall performance and noise level wires are connected to the GTS100 via of the system. The ground wire must the power connector on the end of the be solidly connected to a major sheet amplifier. Use the included wire harness metal structure of the vehicle. Usually for connections. In some case
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JBL 1394 Manual 7/17/98 11:49 AM Page 15 wire for all grounding, even signal on and off with the vehicle’s ignition processors and head units, can also switch. The remote on/off system draws help to minimize possible noise negligible current so a relatively small pickup. (18 or 20 gauge) extension wire may be used. Be sure to securely crimp or sol- Remote Turn-On Wire (Blue with der and insulate the wire-to-wire con- White Stripe) nections. Because the JBL GTS100 includes Common Sense 2-way
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JBL 1394 Manual 7/17/98 11:49 AM Page 16 NOTE: The GTS100 has a built-in outboard crossover, use the “R” mode 80Hz low pass (subwoofer) crossover and and connect your source input to the a 100Hz high pass (satellite) crossover. right channel input. Be sure the crossover switch is properly Simultaneous Stereo + Mono – For this set for the chosen system configuration connection, the Input Mode switch is left (See the “Typical Applications” section in the stereo position. Main speakers for sugge
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JBL 1394 Manual 7/17/98 11:49 AM Page 17 Speaker Level Input Color Codes Dual Source Remote Wiring diagram. Left (+): White 1N4001 From Head Diode Unit #1 Left (-): White with Black Stripe Remote or Antenna Output Right (+): Gray To Right (-): Gray with Black Stripe GTS100 Remote Using Both the Speaker Level Input 1N4001 From Head Diode and Line Level Input Together Unit #2 Remote or In some systems it may be desirable to Antenna Output use both the speaker level inputs and line level input
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JBL 1394 Manual 7/17/98 11:49 AM Page 18 Please do not call JBL for this part; we same time. This is sometimes used for stock only the harness assemblies as center-channel applications or for inex- supplied with the amplifier. pensive subwoofer addition, essentially creating a 3-channel system. However, To get proper bass response and unlike a true bi-amplified subwoofer stereo imaging, all the speakers in the connection, this system configuration system must be “in phase.” The inputs does not
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JBL 1394 Manual 7/17/98 11:49 AM Page 19 Subwoofer (Low Pass) Simultaneous Stereo-Mono Connection Diagrams A. Satellite/Subwoofer (+) (–) Component Values for 4 Ohm Loudspeakers* Tweeter/Midrange Satellites (High Pass) High Pass Satellite Right Left Crossover Frequency: 100Hz (–) (+) (+) (–) C: 300μF Capacitor L 100V, Non-Polorized CC Subwoofer Low Pass Crossover Frequency: 100Hz L: 6.2mH Air Core Inductor LINE INPUT MODE SPEAKER CROSSOVER SPEAKER + IN OUT RL R INPUTS OFF HIGH OUTPUTS FUSE 2
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JBL 1394 Manual 7/17/98 11:49 AM Page 20 carefully to the system output, adjust Operation the volume control of the radio/tape Before operating the GTS100, recheck deck to the point where you first begin all wiring connections to make sure they to hear audible distortion. Reduce the are correct and secure. Be sure that a level just to the point where the distor- 20 amp fuse (not included) is installed tion goes away. This is the maximum in the +12V line next to the battery. undistorted output
