User manual BLAUPUNKT MPA 160

[. . . ] Disconnect the negative terminal of the battery before carrying out installation and connection work. Observe the vehicle manufacturer's safety instructions (regarding airbags, alarm systems, trip computers, vehicle immobilisers). The final stage must be installed professionally for reasons of safety. [. . . ] This enables the amplifier to be switched on and off with the radio's On/ Off switch. High-level inputs The amplifier is equipped with high-level inputs to permit connection to radios without preamp outputs (Fig. This enables direct connection to be made to the radio's loudspeaker output. Gain control The gain control enables the input sensitivity of the final stage to be matched to the output voltage of your car radio preamp output. Adjust the input sensitivity in accordance with the manufacturer's specifications when connecting the amplifier to other radios. important: Turning the gain control clockwise increases the input sensitivity of the amplifier , and thereby also the volume. The gain control is however not a volume control; an increase in volume is not achieved in the maximum position, even if this subjectively appears to be the case. The system merely increases the volume more quickly when the volume is turned up on the radio. Tri-mode loudspeaker connections MPA amplifiers can be used in a combined mono/stereo mode (Fig. This facility enables the amplifier to be used simultaneously with stereo satellite speakers (mid-range and tweeter) and a mono subwoofer. The connections are somewhat more complicated in this case, as they require the use of passive crossover networks (not supplied with the amplifier) which divide the frequency ranges between the various loudspeakers. The requisite connections can be taken from the diagrams below. If you do not wish to purchase and connect the components separately, a number of ready-assembled tri-mode crossover networks are available. ask your local car audio retail store for details. CAUTION: In tri-mode (combined mono/stereo mode) the amplifier must be presented with a load of at least 2 Ohms (stereo satellite speakers) or 4 Ohms (mono subwoofers). Lower loads cause overheating of the amplifier and may damage it permanently. loudspeaker connections (If the amplifier is to be connected in a bridged mode , proceed with the section "Bridged loudspeaker connections". ) As with any audio component, connection of the amplifier and speakers with the correct polarity is essential for good bass reproduction. [. . . ] Clean the contact surface of the ground point down to bare metal and coat with antiseize graphite petroleum. Note: If the amplifier is to be used in the tri-mode configuration, the crossover frequency selector switch must be set to , , Flat" in order to make the full frequency range available. adjustment of the type and range of the cross-over frequencies. [. . . ]