User manual JBL REF510BLK-H

[. . . ] Also, save these instructions for future reference. Important: Installation of automotive stereo components can require extensive experience in performing a variety of electrical and mechanical procedures. Although these instructions explain how to install a JBL Power Series amplifier in a general sense, they do not show the exact installation methods for your particular vehicle. If you do not have the experience necessary, do not attempt the installation yourself; instead ask your Authorized JBL Car-Audio Dealer about professional installation options. 2 P-4020 MADE IN THE U. S. A. P-4040 MADE IN THE U. S. A. SPEAKER OUTPUTS BRIDGE ­ L ­ + R + FUSE 20A POWER +BATT REM GND SPEAKER OUTPUTS FRONT ­ L + BRIDGE ­ R + FUSE 30A POWER +BATT REM GND 0 REAR BRIDGE 4 · Always wear protective eyewear when using tools. [. . . ] Speaker-Output Connector ­ (2-channel on P-4020, 4-channel on P-4040). Fuses ­ P-4020: 20A ATC type, P-4040: 30A ATC type. Power Connector ­ Connection for 12V +, Gnd and Rem. 7 8 11 11 8 7 7. Input-Mode Switch ­ Sums left and right inputs. Input-Sensitivity Control ­ Adjusts input sensitivity for pre-amp level and speaker-level inputs. Pre-amp Output Selector Switch ­ Selects input path for pre-amp output. Output can be summed from front and rear inputs with no filter, or filtered by the front or rear crossover. 10. Rear-Channel Input Selector ­ Selects rear-channel input between front input and rear input. Crossover Selector ­ Determines whether the crossover is a High-Pass filter (HP), a Low-Pass filter (LP) or unfiltered (Flat). 3 Mounting the Amplifier The JBL P-4020 (or P-4040) can be mounted in virtually any location inside the vehicle. However, make sure to keep the amplifier away from heater vents or ducts. At the chosen site, use the amplifier as a mounting template and mark the locations of the four mounting holes. Refer to the "Applications" section for system expansion possibilities. Setting Input Sensitivity Proper input-sensitivity control settings on Power Series amplifiers are critical to ensure optimum performance, low noise levels and maximum system reliability. As a general rule, controls at the front end of a system (source, equalizers and other processors) should be set as high as possible with the amplifier input sensitivity set as low as possible while still providing adequate volume levels. Using a high signal level and a low-sensitivity setting will help keep background noise in the system to a minimum. Initially, turn the input sensitivity GAIN control to its minimum (counterclockwise) position. 4. In some systems it may be desirable to have two sources play simultaneously through the audio system. For instance, if you have a factory-installed radio in your car and you want to add an aftermarket CD player, you may connect the CD player to the RCA inputs of the amp and the factory radio to the Universal Interface speaker inputs. (Note: Front and rear channels of the CD and radio must be driven into the front and rear inputs of the amplifier. Use Y adapters if necessary. ) The Universal Interface circuitry will isolate the two signals from each other while allowing them to drive the amp simultaneously. Therefore, switching from one source to the other is as simple as turning the unused source off, and the other on. (Note: you must connect the remote turn-on wire from the CD player to the Rem terminal on the amp. [. . . ] Stop the adjustment and turn it back slightly. This is the maximum undistorted output level of your system, and it should not be exceeded during use. 3. After adjusting the level of the main speakers in your system, you should adjust the remaining channels (if you are using a P-4040 or a multi-amp system) for the desired system balance. You'll find this easiest to do by adjusting the channels in the following order: 1) front speakers, 2) rear speakers, 3) subwoofer. [. . . ]