User manual MB QUART NKF116 INSTALLATION

[. . . ] The success of any car stereo system relies on several factors, such as the system design, execution of the installation, and system setup. This section is intended to assist the installer by offering several tips and hints about good installation practice. Please remember that any system is only as good as its weakest link. Then choose the amplifier power points according to personal taste. [. . . ] Next, connect all power grounds and remote turn on leads. now connect all +12 volt cables to the amplifier/s and distribution blocks and fuse holders. Finally, connect the main +12 volt cable to the battery, with the main fuse removed, and we are almost ready to power up the system. Power up the system: The following procedure may seem like overkill, but there is nothing more frustrating than turning on a system for the first time, and it does not work properly immediately. First, make sure the head unit is off, and turn all level controls to minimum (anticlockwise), including the head unit volume control. If the fuse does not blow, you can insert the fuse in one of the amplifiers, and we are ready to turn on the system. Turn the head unit on, insert a CD, or select a radio station, and increase the head unit volume control. If the system sounds fine, turn off the head unit, and install fuses in the remaining amplifiers, one by one, till the complete system is powered up and functioning properly. POWER: Lights up when power and remote turn on is applied. LP (LOW-PASS) will route those frequencies below the CROSSOVER FREQ SELECT controls to the internal amplifiers. The variable pot sets the crossover frequency point for both high and low pass. 2 BASS REMOTE When the MBQR-1 Bass Remote is plugged in, you can vary the bass boost from 0 dB to 9 dB via the under dash bass remote module. The variable LPF(LOW PASS FILTER) can be adjusted from 35 Hz to 250 Hz. The variable SUBSONIC filter can be adjusted from 10 Hz to 50 Hz. The variable BASS EQ is a variable boost from 0 dB to 9 dB at fixed 45 Hz. Note: Check your radio/CD player manual for the cor rect line level sensitivity and adjust the amplifier level control to match. T his output can drive the input of other amplifier s in a system (daisy chain). LEFT and RIGHT inputs to the amplifier, from the radio/CD line level (RCA) source with a range of 0. Use a line converter if the radio/CD player has speaker (high level) outputs only. At this point, all crossover frequency and input selection switches should be properly set for the application, and all volume, level and equalizer controls turned to minimum. Level control setup: Insert a CD or cassette that you are familiar with to use as a reference, and turn the head unit volume control to about 80% of its full setting. The system sound level will of course be very low, and the following procedures will help you to match the amplifier input sensitivities properly to the head unit output signal level. [. . . ] If it goes into diagnostic now, the fault lies in the input, either with bad cables or source unit. If the amplifier seems fine with RCA cables plugged in, connect the speakers, one at a time, and if one of the speakers or its wiring is faulty, it will activate the diagnostic system. Amplifier heatsink overheating: The amplifiers will shut down when the heatsink temperature reaches 80 degrees centigrade, and turn back on once the unit has cooled down below that point. causes of overheating: 1 - Inadequate cooling - relocate or remount to provide better natural airflow over the fins. [. . . ]