Alpine INA-W900BT Owner's Manual (English) - Page 65

About the Crossover Crossover (X-Over): This unit is equipped with an active crossover. The crossover limits the frequencies delivered to the outputs. Each channel is controlled independently. Thus, each speaker pair can be driven by the frequencies for which they have been optimally designed. The crossover adjusts the HPF (high pass filter) or LPF (low pass filter) of each band, and also the slope (how fast the filter rolls off the highs or lows). Adjustments should be made according to the reproduction characteristics of the speakers. Depending on the speakers, a passive network may not be necessary. If you are unsure about this point, please consult your authorized Alpine dealer. 4.2ch (FRONT/REAR/SUBW.) mode Low range speaker Rear high range speaker Front high range speaker Cut-off frequency (1/3 octave steps) Slope HPF LPF HPF LPF ---- 20 Hz 200 Hz FLAT, 6, ---- 12, 18, 24 dB/oct. 20 Hz 200 Hz FLAT, 6, ---- 12, 18, 24 dB/oct. ---- 20 Hz 200 Hz FLAT, 6, ---- 12, 18, 24 dB/oct. ---- Level 0 to -12 dB 0 to -12 dB 0 to -12 dB Low range High range Level adjusting (0 to -12 dB) Output frequency range Slope FLAT Slope adjusting 20 Hz (Different from actual display) HPF cut-off LPF cut-off frequency frequency • HPF (high pass filter): Cuts the lower frequencies and allows the higher frequencies to pass. • LPF (low pass filter): Cuts the higher frequencies and allows the lower frequencies to pass. • Slope: The level change (in dB) for a frequency change of one octave. • The higher the slope value, the steeper the slope becomes. • Adjust the slope to FLAT to bypass the HP or LP filters. • Do not use a tweeter without the HPF on or set to a low frequency, as it may cause damage to the speaker due to the low frequency content. • You cannot adjust the crossover frequency higher than the HPF or lower than the LPF. • Adjustment should be made according to the recommended crossover frequency of the connected speakers. Determine the recommended crossover frequency of the speakers. Adjusting to a frequency range outside that recommended may cause damage to the speakers. For the recommended crossover frequencies of Alpine speakers, refer to the respective Owner's Manual. We are not responsible for damage or malfunction of speakers caused by using the crossover outside the recommended value. (Different from actual display) 2.2ch (3WAY) mode Low range speaker Cut-off frequency (1/3 octave steps) HPF LPF ---- 20 Hz 200 Hz Mid range 20 Hz - 20 Hz speaker 200 Hz 20 kHz 1 kHz - High range speaker 20 kHz, (20 Hz ~ ---- 20 kHz)* Slope Level HPF LPF ---- FLAT, 6, 12, 18, 24 dB/oct. 0 to -12 dB FLAT, 6, 12, 18, 24 dB/oct. FLAT, 6, 12, 18, 24 dB/oct. 0 to -12 dB FLAT* 6, 12, 18, 24 dB/oct. ---- 0 to -12 dB * Only when selecting User's in "Setting the Response Slope for the High Range Speaker (TW Setup)" (page 59). Low range Mid range High range (Different from actual display) 63-EN