User manual JBL GTS150

[. . . ] for Add-On or Upgrade . . . . . . . . . . . . . . . . . . . 23 23 24 26 29 30 32 34 35 Owner's Warranty Information Model Number Serial Number Dealer Name City, State, Zip Sales Receipt Number Date of Purchase 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. [. . . ] In the "L+R" position, the signal from both channels is summed internally. When using a single GTS100x for mono mode fed with a stereo signal, it is best to use the "L+R" mode. When using a GTS100x for each channel, or when feeding a single GTS100x with a mono signal from an 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 connected in bridged mode. Refer to the diagram on page 21 in the "Speaker Connections" section for details. Speaker-Level Input Connections When speaker-level signal is used to drive the GTS100x, the signal goes into the amp through a special four-wire harness/connector (see the "Controls and Connectors" section, page 12). If extension wires are needed between the head unit output and the amplifier unit, use conventional speaker wire. Keep the wiring inside the passenger and trunk compartments and make the wires as short as possible. All connections should be securely crimped or soldered and insulated with heatshrink tubing. Use the color code of the input harness wires and the identification on the radio/tape deck output wires to be sure that left and right channels are correctly con- nected and the positive/negative polarity of each channel is connected correctly. For example, the left positive output of the head unit must be connected to the left positive input of the GTS100x. The color codes for the speaker level input harness are as follows: Speaker-Level Input Color Codes Left (+): White Left (­): White with Black Stripe Right (+): Gray Right (­): Gray with Black Stripe Simultaneous Speaker-Level and Line-Level Inputs In some systems it may be desirable to use both the speaker-level inputs and line-level inputs simultaneously. Connect the loudspeaker negative (­) terminal to the LEFT channel negative wire (White with Black stripe). The input-mode switch should be set to "R" or "L+R. " Simultaneous Stereo + Mono Connection ­ The GTS100x may be used to drive a stereo pair of speakers with a mono (bridged) speaker at the same time. This is sometimes used for centerchannel applications or for inexpensive subwoofer addition, essentially creating a threechannel system. However, unlike a true bi-amplified subwoofer connection, this system configuration does not provide for control of subwoofer-satellite balance; it requires the use of a passive subwoofer crossover instead of the superior active circuitry already built into the GTS100x, and it does not separate the power amps driving the satellites from the amps driving the subwoofer. Therefore, this connection is best used for addition of a center-channel speaker, or as an interim step as you build up to a true bi-amplified subwoofersatellite system. Connect the main pair of stereo speakers as in the stereo mode, connect the mono speaker as described for bridged-mode connection (see diagram on page 21). For use in center-channel applications, a high-power "L-Pad" or power fader can be used to attenuate the center channel for proper level matching. For subwoofersatellite use, connect a nonpolarized capacitor in series with each main speaker, and a highpower inductor (coil) in series with the subwoofer. Your authorized JBL dealer will help you choose the correct values for your particular components. The input-mode switch should be set to "Stereo. " Operation Before operating the GTS100x, recheck all wiring connections to make sure they are correct and secure. Be sure that a 20-amp fuse (not included) is installed in the +12V line next to the battery. [. . . ] · Defective head unit or signal processor; check each component for proper wiring and operation. · Defective GTS100x; if there is audio signal present at the inputs of the GTS100x and there is no output, the GTS100x may be defective. Alternator whine through the audio system with the engine running · Ground loops; follow the wiring suggestions in the section called "Solving Noise Problems" (page 26). Also, verify that the chassis grounding point you have chosen is true ground by checking for continuity between the chassis ground point and battery ground. Bass output from speakers too low. · Speaker wired out of phase; check for proper polarity on all speaker wiring (+ amp terminal to + speaker terminal and ­ amp terminal to ­ speaker terminal). If you want to talk to us about any problems, call JBL Customer Service at 1-800-336-4JBL between 9AM and 5PM Eastern time. 33 Specifications 34 Continuous Power Output (10Hz ­ 50kHz, 14. 4V Battery Voltage, 80kHz filter) Signal-to-Noise Ratio Frequency Response Damping Factor Line-Level Input Sensitivity (for rated power) Line-Level Input Impedance Speaker-Level Input Impedance Speaker-Level Input Sensitivity Preamp Output Sensitivity Minimum Speaker Impedance Single Ended, Non-Bridged Bridged Built-In Electronic Crossover Frequency and Slope Power Requirement Fuse Size Size (L x W x H) Weight Speaker Input / Output Mating Connector Power Mating Connector 35 watts x 2 (4 ohms, 0. 05% THD) 50 watts x 2 (2 ohms, 0. 08% THD) 100 watts x 1 (4 ohms, 0. 08% THD) 100dBA 10Hz ­ 50kHz (+0, ­ 1dB) 20Hz ­ 20kHz (+0, ­ 0. 1dB) >200 100mV ­ 4V RMS (500mV nominal) 10k ohms 15 ohms 200mV ­ 8V RMS (1V nominal) 2V out for 4V speaker-level input 2 ohms 4 ohms 80Hz, 18dB per octave low-pass filter 100Hz, 18dB per octave high-pass filter 11 to 16V DC negative ground 20 amp ATC-type fuse 6-5/8" x 9-1/4" x 2" (168. 3mm x 235. 0mm x 50. 8mm) 4lbs. 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