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GTQ 360 new 7/17/98 10:44 AM Page 1
GRAND TOURING SERIES
Automotive Power Amplifier
GTQ360, GTQ240 Owner’s Manual
GTQ 360 new 7/17/98 10:44 AM Page 2 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Thanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 About Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Installation and Use . . . . . . . . . . . . . . . . . . . . . . . . . . .
GTQ 360 new 7/17/98 10:44 AM Page 3 1. Introduction 1.1 Thanks for purchasing your new GT series automotive multi-channel 2. Installation and Use ampliﬁer. Your GT series ampliﬁer will easily connect to virtually any car audio 2.1 Refer to the “Speaker-Level Input system, whether it is factory installed or Impedance Adjustments” and “Crossover purchased separately. The GTQ360 and Frequency Adjustments” sections of this 3. Mount ampliﬁer in the desired location GTQ240 include an abundance of u
GTQ 360 new 7/17/98 10:44 AM Page 4 SPEAKER LEVEL INPUTS SPEAKER OUTPUTS (BRIDGED: R+TO L–) LINE LEVEL PREAMP REM POWER R GR2 L L GR1 R L GR2 R BASS EQ MODE CROSSOVER INPUT BASS EQ MODE CROSSOVER IN/OUT MUTE INPUT OUTPUTS +– –+ + +++ FUSE FUSE OFF ON SPEAKER PREAMP GR1 GR2 OFF ON SPEAKER PREAMP GR1 GR2 GR1 GR2 30A 30A FFHH FFHH L R ST L+R L L R ST L+R L L +– –+ CROSSOVER DESIGNATIONS MIN MAX MIN
GTQ 360 new 7/17/98 10:44 AM Page 5 4.3 Remote-In/Out Connection • The remote power control system turns the GTQ ampliﬁer off when not in use to 4. Wiring prevent discharging of the vehicle’s bat- tery. Because the JBL GTQ ampliﬁers 4.1 Wiring include Common Sense 2-way turn-on, Proper wiring of the GTQ ampliﬁers and when using the speaker-level inputs with the associated components is extremely a head unit that includes a BTL power 3.2 Signal Sources important for proper performance and am
GTQ 360 new 7/17/98 10:44 AM Page 6 Subwoofer (Low-Pass) A. Satellite/Subwoofer Cassette/CD Tuner Speaker-Level Output Connection (Use only when line-level output is not available) (–) (+) High-Pass Satellite CD Player Cassette/CD Tuner Crossover Frequency: 100Hz Tweeter/Midrange Satellites or Changer (High-Pass) Left Right C: 300μF capacitor 100V, non-polarized (–) (+) (+) (–) L Subwoofer Low-Pass Crossover Frequency: 100Hz C C Antenna Input L: 6.2mH air core inductor CD Input Amplifier Pow
GTQ 360 new 7/17/98 10:44 AM Page 7 5. Internal Adjustments 5.1 Speaker-Level Input 5.2 Crossover Frequency 5.3 Custom Chip Construction Impedance Adjustments Adjustments Regardless of whether you build or buy it, The speaker level inputs of the GTQ The GTQ ampliﬁers include built-in the necessary resistor network has the ampliﬁers come factory-set with frequency selectable crossovers. One following conﬁguration: 100k ohm input impedance. This will pro- crossover is connected in series with
GTQ 360 new 7/17/98 10:44 AM Page 8 BEST-Vertical Mounting To change the crossover frequency AIR FLOW change the resistor network as follows: 1. Remove the screws from the bottom panel as shown below. 6. Adjusting the Gain Before operating the GTQ ampliﬁers, 7. Typical Applications recheck all wiring connections to make sure they are correct and secure. Be sure The following diagrams show the most that a fuse (not included) is installed in the common basic system conﬁgurations of + 12V line ne
GTQ 360 new 7/17/98 10:44 AM Page 9 LR R L LR R L Preamp or Preamp or Front Rear Speaker-Level Application 1 Application 3 Front Rear Speaker-Level Input Input LR R L 4-Channel Full-Range 4-Channel Bi-Amplified System with LR R L GR 1 GR 2 GR 1 GR 2 Non-Fading Subwoofers Group 1 Group 2 Group 1 Group 2 Input Mode ST ST Group 2 Input – GR 2 Mode Stereo Stereo GTQ GTQ Speaker Crossover Flat Flat Group 2 Input – GR 1+2 AMP AMP Preamp Output Crossover – – Speaker Crossover High Pass Low Pass GR 1
GTQ 360 new 7/17/98 10:44 AM Page 10 8. 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 defec- tive; check for continuity with an ohm- meter between the ampliﬁer’s ground ter- minal and a known chassis ground point. • Battery wire is disconnected or defec- tive; check for approximately +12 volts Power light is on, but no sound is heard between the ampliﬁer’s battery and from some or all of the speakers ground term
GTQ 360 new 7/17/98 10:44 AM Page 11 Speciﬁcations GTQ360 GTQ240 Power Output 60 Watts x 4 (4 Ohms, 0.05% THD) 45 Watts x 4 (4 Ohms, 0.05% THD) (20Hz – 20kHz, 90 Watts x 4 (2 Ohms, 0.08% THD) 60 Watts x 4 (2 Ohms, 0.08% THD) 14.4V Battery Voltage) 180 Watts x 2 (Bridged 4 Ohms, 0.08% THD) 120 Watts x 2 (Bridged 4 Ohms, 0.08% THD) Signal-to-Noise Ratio 100dBA 100dBA Frequency Response 10Hz – 50kHz (+0, –1dB) 10Hz – 50kHz (+0, –1dB) 20Hz – 20kHz (+0, – 0.1dB) 20Hz – 20kHz (+0, – 0.1dB) Damping
G N 5 I 0 T A Y GTQ 360 new 7/17/98 10:44 AM Page 12 Declaration of Conformity Warranty T erms: 1 Year Transferable Limited Warranty / 2 Year Extended Transferable Limited Warranty (USA Only) We, JBL Europe A/S Kongevejen 194B DK-3460 Birkerød DENMARK This is an important document. declare in own responsibility, that the products described in this owner’s manual are in compliance with technical Attach your bill of sale to standards: this page and keep it in a safe EN 55 020 /6.1988 place. Y
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