Kenwood KAC-X542 ■4-channelsystem, ■2-channel+ Subwoofer system, ■High-power 2-channelsystem, ■Tri-mode, Example:, Coil (L):, Capacitor (C):, Principle of Tri-mode

System examples

■4-channel system

				L	L			Front Left speaker
CENTER UNIT				R	A R			Front Right speaker
				L	B			Rear Left speaker
				R				Rear Right speaker
150		100		1	100			1
100	70	150	2		70	150	2
				0.5				0.5
70			3	0.3			3	0.3
			4				4
50 200	50	200	(MIN)5	0.2(MAX) 50		200	(MIN)5 0.2(MAX)
LPF		HPF		INPUT	HPF			INPUT
FREQUENCY(Hz)	FREQUENCY(Hz)		SENSITIVITY(V)		FREQUENCY(Hz)		SENSITIVITY(V)
		B ch				A ch
	FILTER	AMP CONT		ISF OPERATION		HPF	OPERATION
	HPF	ON		ON	MONO(Lch)	ON		MONO(Lch)
	OFF
	LPF	OFF		OFF	STEREO	OFF		STEREO

■2-channel + Subwoofer system

CENTER UNIT				L	A			Left speaker (High pass)
				R				Right speaker (High pass)
				L	B			Subwoofer
				R				(Bridged)
150		100	1		100			1
100	70	150	2		70	150	2
				0.5				0.5
70			3	0.3			3	0.3
			4				4
50 200	50	200	(MIN)5	0.2(MAX) 50		200	(MIN)5 0.2(MAX)
LPF		HPF	INPUT		HPF			INPUT
FREQUENCY(Hz)	FREQUENCY(Hz)		SENSITIVITY(V)		FREQUENCY(Hz)		SENSITIVITY(V)
		B ch				A ch
	FILTER	AMP CONT ISF		OPERATION		HPF	OPERATION
	HPF	ON	ON		MONO(Lch)	ON		MONO(Lch)
	OFF
	LPF	OFF	OFF		STEREO	OFF		STEREO

■High-power 2-channel system

				L	L				Left speaker (Bridged)
						A
CENTER UNIT					R
				R	L	B			Right speaker (Bridged)
					R
100	150		100		1	100			1
		70	150	2		70	150	2
					0.5				0.5
70				3	0.3			3	0.3
				4				4
50	200	50	200	(MIN)5	0.2(MAX) 50		200	(MIN)5	0.2(MAX)
	LPF		HPF		INPUT	HPF			INPUT
FREQUENCY(Hz)		FREQUENCY(Hz)		SENSITIVITY(V)		FREQUENCY(Hz)		SENSITIVITY(V)
			B ch				A ch
		FILTER	AMP CONT		ISF OPERATION		HPF	OPERATION
		HPF	ON		ON	MONO(Lch)	ON		MONO(Lch)
		OFF
		LPF	OFF		OFF	STEREO	OFF		STEREO

■Tri-mode

(High pass)	Subwoofer
	(L + R) (Bridged)

Principle of Tri-mode

Method of frequency band division using a coil and capacitor…in case of 6dB/oct. slope.

		C	L
	L	L
CENTER UNIT	R	A
		R
		C
		C	L
	L	L
	R	B
		R
		C

	Crossover Frequency
0 dB
-3 dB
	L		C
			Frequency
	159 x R		159000
L=	fc	(mH)	C= fc × R	(μF)

Coil (L):

Passes low frequencies and blocks high frequencies. (Low pass)

Capacitor (C):

Passes high frequencies and blocks low frequencies. (High pass)

fc=Cut of Frequency (Hz) R=Speaker Impedance (Ω)

100	150		100		1		100		1
		70	150	2		70	150	2
					0.5				0.5
70				3	0.3			3	0.3
				4				4
50	200	50	200	(MIN)5	0.2(MAX) 50		200	(MIN)5	0.2(MAX)
	LPF		HPF		INPUT		HPF		INPUT
FREQUENCY(Hz)		FREQUENCY(Hz)		SENSITIVITY(V)		FREQUENCY(Hz)		SENSITIVITY(V)

	B ch			A ch
FILTER	AMP CONT	ISF	OPERATION	HPF	OPERATION
HPF	ON	ON	MONO(Lch)	ON	MONO(Lch)
OFF
LPF	OFF	OFF	STEREO	OFF	STEREO

Example:

When it is required to set a crossover frequency of 120 Hz using speakers with an impedance of 4 ohms.

Prepare commercially-available coil and capacitor with the closest ratings to the results calculated from the formula above. The capacitor rating should be as close as possible to 331.25 (μF) and the coil rating should be as close as possible to 5.3 (mH).

2CAUTION

•If you wish to bridge-connect a speaker, the speaker impedance must be no less than 4 ohms. Connecting a speaker with an impedance lower than 4 ohms may damage the unit.

•Be sure to connect capacitors to speakers to which high frequencies will be passed. Failure to do so will result in a drop of the combined impedance with the subwoofer.

•Ensure that the withstand voltage and current ratings of the capacitors (C) and coils

(L) are sufficient.

8English