Alpine CDA-9811 owner manual About the Crossover CDA-9815/CDA-9813only, 15-EN

Recalling the Stored Equalizer Curve (CDA-9815/CDA-9813 only)

1 Press EQ to select EQ mode.

2 Press and hold EQ for at least 2 seconds.

3 Press any one of the preset buttons (1 through

6)to activate your desired curve.

4 Press EQ to return to normal mode.

•EQ mode is automatically canceled if no operation is performed within 15 seconds.

•This function is inoperable when DEFEAT is set to ON (page 13).

•If you do not adjust the factory settings of (FLAT/POPS/ROCK/ NEWS), the factory set display (FLAT/POPS/ROCK/NEWS) is shown preferentially.

About the Crossover (CDA-9815/CDA-9813 only)

Crossover:

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.

2 way mode

	Cut-off frequency		Slope
	(1/3 octave steps)
					Level
	HPF	LPF	HPF	LPF
Low range				FLAT, -6,
	----	20 Hz -	----	-12, -18,	0 to
speaker		200 Hz		-24 dB/oct	−12 dB
Rear high	20 Hz -		FLAT, -6,		0 to
range		----	-12, -18,	----
	200 Hz				−12 dB
speaker			-24 dB/oct
Front high	20 Hz -		FLAT, -6,		0 to
range		----	-12, -18,	----
	200 Hz				−12 dB
speaker			-24 dB/oct

Low range High range

(Different from actual display)

3 way mode

		Cut-off frequency		Slope
		(1/3 octave steps)
							Level
		HPF	LPF	HPF		LPF
Low range		----	20 Hz -	----	FLAT, -6,		0 to
					-12, -18,
speaker			200 Hz				− 12 dB
					-24 dB/oct
Mid range		20 Hz -	20 Hz -	FLAT, -6,	FLAT, -6,		0 to
				-12, -18,	-12, -18,
speaker		200 Hz	20 kHz				−12 dB
				-24 dB/oct	-24 dB/oct
High range		1 kHz -	----	-6, -12, -18,	----		0 to
speaker		20 kHz		-24 dB/oct			−12 dB
	Low range		Mid range	High range

(Different from actual display)

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.

15-EN