Alpine R-A75M Owners Manual English - Page 12

Crossover Mode Selector Switch (CHANNEL-3/4) (R-A60F only) a) Set to the "OFF" position when the amplifier will be used for driving full range speakers or when using an external electronic crossover. The full frequency bandwidth will be output to the speakers with no high or low frequency attenuation. b) Set to the "HP" position when the amplifier is used to drive a tweeter/ midrange system. At this setting, Crossover Frequency Adjustment Knob ( ) provides adjustment between 50 Hz to 400 Hz. The frequencies below the crossover point will be attenuated at 12 dB/octave. c) Set to the "LP" position when the amplifier is used to drive a subwoofer. At this setting, Crossover Frequency Adjustment Knob ( ) provides adjustment between 50 Hz to 400 Hz. The frequencies above the crossover point will be attenuated at 12 dB/octave. d) Set to "BP" if the amplifier is used to drive a midbass or midrange speaker. Frequencies lower than the specified frequency set by Crossover Frequency Adjustment Knob ( ), and higher than the frequency specified set by Crossover Frequency Adjustment Knob ( ), are attenuated at 12 dB/ octave. Crossover Frequency Adjustment Knob (HP/ LP/BP-L FREQ.) (R-A60F only) Use this control to adjust the crossover frequency between 50 Hz to 400 Hz. NOTE: • When the Crossover Mode Selector Switch ( ) is set to [BP], adjust the Crossover Frequency Adjustment Knob ( ) and ( ). Crossover Frequency Adjustment Knob (BP-H FREQ.) (R-A60F only) Use this control to adjust the crossover frequency between 400 Hz to 6 kHz. NOTES: • When the Crossover Mode Selector Switch ( ) is set to [BP], adjust the Crossover Frequency Adjustment Knob ( ) and ( ). • When the Crossover Mode Selector Switch ( ) is set to [HP] or [LP], adjustment of the Crossover Frequency Adjustment Knob ( ) is disabled. Adjustment range on the Bandpass Filter Crossover Frequency [BP-L] [BP-H] [BP-L] Adjustment range [BP-H] Adjustment range 50 Hz 400 Hz 6 kHz 10-EN