Russound R850MC user manual Bridged Operation, Thermal Protection, Protection Circuitry

R850MC AMPLIFIER

BRIDGED OPERATION

When the amplifier is in Bridged mode operation, both the left and right channels are combined for a higher power mono output.

For bridged amplifier operation, turn off the power to the amplifier and connect an 8-ohm minimum load to the Speaker B output.

Following the Bridge mode markings in red on the back of the amplifier: Connect the negative lead (-) of the speaker cable to the R+ terminal. Connect the positive lead (+) of the speaker cable to the L+ terminal. Set the Stereo/Bridge Mono switch to Bridge Mono, connect the Line In feed from a source to the Left Line In connection and restore power to the amplifier.

RCA Cable from source

Left In Right In

		Line In L		R			Line In L		R
		Bridg e					Bridg e
		In					In
				Line In					Line In
	Speak er	R+		Bus In	Speak er		R+		Bus In
	A	R-				A	R-
		L-		L			L-		L
		L+					L+
				R					R
(-)Negative	Speak er	R+	-	Stereo	Speak er		R+	-	Stereo	(-)Negative
	B					B
Speaker		R-					R-			Speaker
				Bridge Mono					Bridge Mono
cable	Stereo mode	L-			Stereo mode		L-			cable
	4? minimum				4?	minimum
	impedance	L+	+		impedance		L+	+
(+)Positive					Bridge mode					(+)Positive
	Bridge mode
	8? minimum			DelayTime	8?	minimum			DelayTime
	impedance				impedance

Left Speaker	Zone 2		Zone 1 12V 100mA	Right Speaker
8 ohm		12V 100mA		8 ohm
		Out Trigger In	Out Trigger In

THERMAL PROTECTION PROTECTION CIRCUITRY

All Russound amplifiers are designed with special circuit- ry to safeguard the amplifier under a thermal overload condition. Thermal protection mode can only engage when the unit has been run at high volume for extended periods of time without adequate ventilation and/or when speaker impedances are below the minimum levels for the amplifier. If this fault occurs, turn off the amplifier, and check that the speaker impedance rating is above the minimum rating. Also check for adequate ventilation around the amplifier and make adjustments if necessary. Once the unit has cooled to safe operating tempera- tures, the amplifier may be powered back on.

All Russound amplifiers are designed with special circuit- ry to safeguard the amplifier under a short-circuit condi- tion. A faulty speaker can also cause a short circuit con- dition.

The front panel LED illuminates orange when the amplifi- er is in short circuit protection. If this fault condition occurs, turn off the amplifier and check speakers for short circuit conditions when appropriate.

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