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NOTE: When using the high-level inputs, the AUX outputs can be used to pass a line-level signal to another amplifier. INSTALLING NEON TUBES (OPTIONAL) 1. Using a Phillips screwdriver, remove all screws on the amplifier’s output/power end panel and set them aside. 2.Using a 3 .32-inch Allen wrench, remove only the screws on the amplifier’s (top) clear cover and set them aside. 3. Remove the end panel and slide the cover off. Set both parts aside. 4. Locate the enclosed hardware bag and remove the four clips. Each clip has a square end and a larger round end. Using a round end, press two clips onto each neon tube (e.g., Street Glow AN9 or equivalent), as shown in Figure 13. 5. For each tube, align both clips so the square ends slide onto an exposed extrusion edge, as shown in Figure 9. Do not cover any screw holes. When installed correctly, each neon tube will sit under an extrusion and not be visible when viewed from directly above. 6. Route each neon tube’s power cable through its respective NEON hole on the end panel (see Figure 13). 7. Slide the cover back into place and reinstall its screws. Then, replace the end panel and reinstall its screws. 8. Finish the installation of the neon tubes as instructed in their owner’s manual. GTO75.2 II GTO75.4 II GTO301.1II, GTO601.1II, GTO1201.1II GTO75.6 II INSTALLATION AND SETUP To Neon Power SupplyTo Neon Power Supply Figure 13. Installing neon tubes in a JBL GTO amplifier. TROUBLESHOOTING SYMPTOM LIKELY CAUSE SOLUTION SYMPTOM LIKELY CAUSE SOLUTION No audio No voltage at BATT+ Check voltages at No audio Voltage more than 16V Check vehicle (POWER LED or REM terminals, amplifier terminals (PROTECT or less than 8.5V on charging system for is off) or bad or no ground with VOM LED is on) BATT+ connection defective voltage connection regulator No audio DC voltage on Amplifier may need Distorted audio Input sensitivity is Check INPUT (PROTECT LED amplifier output service; see enclosed not set properly, or LEVEL setting; or flashes every warranty card for amplifier or source check speaker wires 4 seconds) service information unit is defective for shorts or grounds No audio Amplifier is Make sure amplifier Distorted audio Short circuit in Remove speaker leads (PROTECT overheated cooling is not blocked and PROTECT speaker or wire one at a time to locate LED is on) at mounting location; LED flashes shorted speaker or verify speaker system wire, then repair impedance is within specified limits (see “Specifications” on the next page) Music lacks “punch” Speakers are not connected properly Check speaker connections for proper polarity No audio Voltage less than 9V on Check vehicle (PROTECT BATT+ connection charging system for and POWER defective voltage LEDs flash) regulator SPECIFICATIONS GTO301.1II • 204W RMS x 1 channel at 4 ohms and .1% THD + N • Signal-to-noise ratio: 77dBA (reference 1W into 4 ohms) • 294W RMS x 1 channel at 2 ohms, 14.4V supply and .1% THD + N • Dynamic power: 320W at 2 ohms • Effective damping factor: 6.39 at 4 ohms • Frequency response: 10Hz – 302Hz (–3dB) • Maximum input signal: 4.7V • Maximum sensitivity: 75mV • Output regulation: .098dB at 4 ohms • Dimensions (L x W x H): 11-5/8" x 12-5/16" x 2-3/8" • Fuse rating: 1 x 30A GTO75.2 II • 97W RMS x 2 channels at 4 ohms and .1% THD + N • Signal-to-noise ratio: 82dBA (reference 1W into 4 ohms) • 145W RMS x 2 channels at 2 ohms, 14.4V supply and .1% THD + N • 290W RMS x 1 channel at 4 ohms, 14.4V supply and .1% THD + N • Dynamic power: 190W at 2 ohms • Effective damping factor: 6.39 at 4 ohms • Frequency response: 10Hz – 90kHz (–3dB) • Maximum input signal: 5.5V • Maximum sensitivity: 75mV • Output regulation: .098dB at 4 ohms • Dimensions (L x W x H): 11-5/8" x 12-5/16" x 2-3/8" • Fuse rating: 1 x 30A Declaration of Conformity We, Harman Consumer Group International 2, route de Tours 72500 Chateau-du-Loir France declare in own responsibility that the product described in this owner’s manual is in compliance with technical standards: EN 55013:2001 EN 55020:2002 Klaus Lebherz GTO601.1II • 424W RMS x 1 channel at 4 ohms and .1% THD + N • Signal-to-noise ratio: 72dBA (reference 1W into 4 ohms) • 580W RMS x 1 channel at 2 ohms, 14.4V supply and .1% THD + N • Dynamic power: 778W at 2 ohms • Effective damping factor: 6.326 at 4 ohms • Frequency response: 10Hz – 302Hz (–3dB) • Maximum input signal: 5.3V • Maximum sensitivity: 75mV • Output regulation: .21dB at 4 ohms • Dimensions (L x W x H): 15-1/8" x 12-5/16" x 2-3/8" • Fuse rating: 2 x 30A GTO75.4 II • 104W RMS x 4 channels at 4 ohms and .1% THD + N • Signal-to-noise ratio: 80dBA (reference 1W into 4 ohms) • 142W RMS x 4 channels at 2 ohms, 14.4V supply and .1% THD + N • 284W RMS x 2 channels at 4 ohms, 14.4V supply and .1% THD + N • Dynamic power: 163W at 2 ohms • Effective damping factor: 6.384 at 4 ohms • Frequency response: 10Hz – 83kHz (–3dB) • Maximum input signal: 5.8V • Maximum sensitivity: 75mV • Output regulation: ....

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