Alpine R-A90S Owners Manual - Page 11

Side) ide) en the tweeter/ equency ides to 400 the nuated Bass EQ when the tweeter equency ides z to 6 the nuated Crossover Frequency Adjustment Knob (HP FREQ.) Use this control to adjust the crossover frequency between 50 Hz to 400 Hz. Crossover Frequency Adjustment Knob (HP/ BP-L FREQ.) Use this control to adjust the crossover frequency between 50 Hz to 400 Hz. Crossover Frequency Adjustment Knob (HP-H FREQ.) Use this control to adjust the crossover frequency between 400 Hz to 6 kHz. NOTE: • When the Crossover Mode Selector Switch ( ) is set to [BP], adjust the Crossover Frequency Adjustment Knob ( ) and ( ). EN Input Channel Selector Switch (CHANNEL-3/4) Crossover Frequency Adjustment Knob (BP-H FREQ.) a) This switch setting is for selecting Use this control to adjust the crossover either 2-channel or 4-channel input frequency between 400 Hz to 6 kHz. FR mode. When set to "1/2", the signal NOTES: will be copied from CH-1/2 and • When the Crossover Mode Selector Switch ( ) sent to CH-3/4, eliminating the is set to [BP], adjust the Crossover Frequency need for Y-adapters. Adjustment Knob ( ) and ( ). ES • When the Crossover Mode Selector Switch ( ) b) Setting this switch to "3/4" will keep is set to [HP], adjustment of the Crossover both inputs, CH-1/2 and CH-3/4 Frequency Adjustment Knob ( ) is disabled. independent. A 4-channel source is required for Input Channel Selector Switch (CHANNEL-5/6) this mode. a) This switch setting is for selecting either 2-channel or 4-channel + Crossover Mode Selector Switch Subwoofer input mode. When set (CHANNEL-3/4) to "1/2", the signal will be copied a) Set to the "OFF" position when the amplifier will be used for driving from CH-1/2 and sent to CH-5/6, eliminating the need for Y-adapters. 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) Setting this switch to "5/6" will keep both inputs, CH-1/2 and CH-5/6 independent. A 4-channel + Subwoofer source is required for this mode. 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 "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 Mode Selector Switch (CHANNEL-5/6) 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 "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. 9-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES)