Kenwood KAC-7203 ■2-channelsystem, ■2-channel+ Subwoofer system fž, ■High-power 2-channelsubwoofer system, ■Tri-mode, Example:, Coil (L):, Capacitor (C):, Principle of Tri-mode

System examples

■2-channel system

L	L	Left speaker
CENTER UNIT	R	Right speaker
R

■2-channel + Subwoofer system fž

CENTER UNIT	L	L	Left speaker (High pass)
	R	R	Right speaker (High pass)
	LINE OUT
	L	L	Subwoofer
			(L + R)
	R	R
			(Bridged)
	LINE OUT

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■High-power 2-channel subwoofer system

fž

	L
		L	L	Left subwoofer (Bridged)
CENTER UNIT
		R	R
	R	L	L	Right subwoofer (Bridged)

RR

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■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
CENTER UNIT	L	L
	R	R
		C

0 dB	Crossover Frequency
-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)

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.

6English