Boss Audio Systems CX1000, cx450, CX250 Tri-Mode, Power and Speaker Wiring, Component values for

Power and Speaker Wiring	5-Channel Amplifier
Tri-Mode	CX1800

Tri-mode operation allows you to connect this amplifier to a pair of main speakers plus a subwoofer on one pair of output channels. The main speakers will operate in STEREO while the subwoofer simultaneously operates in MONO.

To set up the amplifier to run in this mode, put the crossover switches in the FULL position. Insert high pass filter capacitors and a low pass filter inductor into the wiring as shown below. Be sure to check the table at the bottom of this page to determine the correct capacitor and inductor values for the crossover frequency you wish to achieve.

								SPEAKER
Tri-Mode								IMPEDANCE
		Low pass						8 OHMS
						RIGHT
		filter inductor				Subwoofer
Component values for
6dB Passive Crossover				High pass filter
FREQUENCY INDUCTOR		CAPACITOR		crossover				CH1
80 Hz	7.5mH	470uF						Speaker
								MINIMUM
100 Hz	6.5mH	330uF		High pass filter
120 Hz	5.5mH	330uF						SPEAKER
				crossover				IMPEDANCE
150 Hz	4mH	220uF
								4 OHMS
		CH5						CH2
		Subwoofer						Speaker
	SPEAKER
	IMPEDANCE
	2-8 OHMS
		SPEAKERS	CH1/2				FUSES
			CH1		CH2			POWER CONNECTIONS
		CH5
								GROUND	REMOTE BATT+
			CH3	CH3/4	CH	4
				BRIDGED
										Chassis
										ground
										point
										to REMOTE TURN-ON
						High pass filter				terminal of head unit
						crossover
						–		CH4	FUSE	Battery
						+		Speaker
					High pass filter				MINIMUM
					crossover				SPEAKER
						–		IMPEDANCE
								CH3	4 OHMS
						+		Speaker
		SPEAKER
		IMPEDANCE
		8 OHMS				Low pass
						filter inductor

LEFT

Subwoofer

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 18