JBL Px300.4 owner manual Applications PX300.4

APPLICATIONS – PX300.4

The JBL Px300.4 amplifier can be set up for stereo or tri-mode operation, as shown in Figures 6 and 7.

NOTE: For simplicity, Figures 6 and 7 do not show power, remote and input connections.

Figure 6. The JBL Px300.4 amplifier is set to stereo mode to drive front and rear pairs of full-range speakers.

NOTE: To limit bass sent to full-range speakers, set X-OVER MODE to HP. See page 6 to set FREQ and SLOPE.

Set REAR and FRONT

INPUT MODE to ST

(on input panel)

				FRONT			REAR
GND	REM	BATT			BRIDGED
NEON			R	L	STEREO	R	NEON
							L
Px300.4	POWER	FUSES	SPEAKER OUTPUTS			SPEAKER OUTPUTS

Px300.4	RF Speaker	LR Speaker
(rear panel)
	+	+
Set REAR and FRONT	-	-
X-OVER MODE to FLAT
(on input panel)

					LF Speaker	RR Speaker
ST	MO	FLAT	HP	LP	+	+
	INPUT		MODE
	MODE				-	-

Figure 7. The JBL Px300.4 amplifier is set to drive a stereo component system and a subwoofer with a nominal impedance of 4 ohms or greater.

NOTE: To drive a pair of rear midbass speakers (instead of subwoofer), set INPUT MODE to ST, X-OVER MODE to LP, and use DBO to set HP filter.

Set FRONT

INPUT MODE to ST

(on input panel)

ST MO

INPUT

MODE

GND REM BATT

NEON

Px300.4 POWER

Px300.4

(rear panel)

Set REAR

INPUT MODE to MO

(on input panel)

ST MO

INPUT

MODE

		FRONT			REAR
			BRIDGED		NEON
	R	L	STEREO	R
					L
FUSES	SPEAKER OUTPUTS			SPEAKER OUTPUTS

RF

System

+	Subwoofer
-

+

LF
System	-
+
-

Set FRONT		Set REAR
X-OVER MODE to HP		X-OVER MODE to LP
(on input panel)		(on input panel)
FLAT HP LP		FLAT HP LP
	MODE		MODE

See “Setting the Crossover(s)” on page 6 to set FREQ and SLOPE

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