Tri-Mode

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
Tri-Mode		Low pass						8 OHMS
		Low pass				RIGHT
		filter inductor				Subwoofer
Component values for						Subwoofer
Component values for
6dB Passive Crossover				High pass filter
FREQUENCY INDUCTOR		CAPACITOR		crossover				CH1
FREQUENCY INDUCTOR		CAPACITOR						CH1
80 Hz	7.5mH	470uF						Speaker
80 Hz	7.5mH	470uF						MINIMUM
100 Hz	6.5mH	330uF		High pass filter				MINIMUM
120 Hz	5.5mH	330uF		High pass filter				SPEAKER
120 Hz	5.5mH	330uF		crossover				IMPEDANCE
150 Hz	4mH	220uF		crossover				IMPEDANCE
150 Hz	4mH	220uF						4 OHMS
								4 OHMS
		CH5						CH2
		Subwoofer						Speaker
	SPEAKER
	IMPEDANCE
	2-8 OHMS
		SPEAKERS	CH1/2				FUSES
		SPEAKERS	CH1		CH2			POWER CONNECTIONS

		CH5
		CH5						GROUND	REMOTE BATT+
			CH3	CH3/4	CH	4
			CH3	BRIDGED		4
										Chassis
										ground
										point
										to REMOTE TURN-ON
						High pass filter				terminal of head unit
						High pass filter
						crossover
						–		CH4	FUSE	Battery
						+		Speaker
					High pass filter				MINIMUM
					crossover				SPEAKER
						–		IMPEDANCE
						–		CH3	4 OHMS
						+		Speaker	4 OHMS
		SPEAKER				+		Speaker
		SPEAKER
		IMPEDANCE
		8 OHMS				Low pass
						filter inductor

LEFT

Subwoofer

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 18

Boss Audio Systems CX2000M, CX1100M user manual Tri-Mode

Power and Speaker Wiring

CX1800

Tri-Mode

Component values for

6dB Passive Crossover

FREQUENCY INDUCTOR

CH1

SPEAKER

IMPEDANCE

2-8 OHMS

CH3