User manual ALPINE MRP-F256

[. . . ] When connecting the MRP-F257/MRP-F256/MRP-T306 to the fuse box, make sure the fuse for the intended circuit of the MRP-F257/MRP-F256/MRP-T306 has the appropriate amperage. The MRP-F257/MRP-F256/MRP-T306 uses female RCA-type jacks for connection to other units (e. Due to the high power output of the MRP-F257/MRP-F256/MRP-T306, it is important that all connections are clean and well secured, or damage could result. When installation and connections are completed, check the followings: a) Connections are proper. [. . . ] 4 Crossover Frequency Adjustment Knob (MRPF257 only) Permits adjustment of the crossover frequency, by rotating the knob to select any frequency between 50 to 200 Hz as the crossover point. 1 Crossover Mode Selector Switch (MRP-F257) a) Set to the "HP" position when the OFF HP amplifier is used to drive a tweeter/ midrange system. the frequencies below the crossover point will be attenuated at 18 dB/octave. B) Set to the "OFF" position when the OFF HP amplifier will be used for driving full-range speakers. The full frequency bandwidth will be output to the speakers with no high or low frequency attenuation. 2 Crossover Mode Selector Switch (MRP-F256/ MRP-T306) a) Set to the "LP" position when the OFF HP LP amplifier is used to drive a subwoofer. the frequencies above the crossover point will be attenuated at 18 dB/octave. B) Set to the "HP" position when the OFF HP LP amplifier is used to drive a tweeter/ midrange system. the frequencies below the crossover point will be attenuated at 18 dB/octave. OFF HP LP c) Set to the "OFF" position when the amplifier will be used for driving full-range speakers. The full frequency bandwidth will be output to the speakers with no high or low frequency attenuation. Before making connections, be sure to turn the power off to all audio components. Connect the yellow battery lead from the amp directly to the positive (+) terminal of the vehicle's battery. Locate the unit and route the leads at least 10 cm away from the car harness. â· Keep the battery power leads as far away from other leads as possible. â· Connect the ground lead securely to a bare metal spot (remove the coating if necessary) of the car chassis. â· If you add an optional noise suppressor, connect it as far away from the unit as possible. Your Alpine dealer carries various Alpine noise suppressors, contact them for further information. â· Your Alpine dealer knows best about noise prevention measures so consult your dealer for further information. 5 RCA Input Jacks Connect these jacks to the line out leads on your head unit using RCA extension cables (sold separately). [. . . ] - Pre-Out Jacks (MRP-F256 only) These jacks provide a Front + Rear summed output (Non-fading). The head unit's power antenna lead is activated only when the radio is on (turns off in the tape or CD Mode). The head unit's power antenna lead is logic level output (+) 5V, negative trigger (grounding type), or cannot sustain (+) 12V when connected to other equipment in addition to the vehicle's power antenna. If any of the above conditions exist, the remote turn-on lead of your MRP-F257/MRP-F256/ MRP-T306 must be connected to a switched power source (ignition) in the vehicle. [. . . ]