JBL Px300.4 owner manual Installation and Setup Troubleshooting, Installing Neon Tubes Optional

INSTALLATION AND SETUP

TROUBLESHOOTING

For sealed enclosures, use DBO to enhance the middle of the bass region. Set the HP FREQ control to 35Hz to 40Hz and adjust the BOOST control to taste. This will make the bass sound bigger and fuller. Alternatively, for tighter- sounding bass, set the HP FREQ control between 45Hz and 50Hz, and also adjust the BOOST control according to your preference.

For infinite-baffle applications, set the HP FREQ control to the speaker’s FS value (to keep the subwoofer from trying to create bass below the resonant frequency) and adjust the BOOST control to taste.

INSTALLING NEON TUBES (OPTIONAL)

1.Using a Phillips screwdriver, remove all screws on the amplifier’s output/power end panel and set them aside.

2.Using a 3⁄32-inch Allen wrench, remove only the screws on the amplifier’s (top) clear cover and set them aside.

3.Remove the end panel and slide the cover off. Set both parts aside.

4.Locate the enclosed hardware bag and remove the four clips. Each clip has a square end and a larger round end. Using a round end, press two clips onto each neon tube (e.g., Street Glow AN9 or equivalent), as shown in Figure 9 below.

5.For each tube, align both clips so the square ends slide onto an exposed extrusion edge, as shown in Figure 9. Do not cover any screw holes. When installed correctly, each neon tube will sit under an extrusion and not be visible when viewed from directly above.

6.Route each neon tube’s power cable through its respective NEON hole on the end panel (see Figure 9).

7.Slide the cover back into place and reinstall its screws. Then, replace the end panel and reinstall its screws.

8.Finish the installation of the neon tubes as instructed in their owner’s manual.

SYMPTOM	LIKELY CAUSE	SOLUTION
No audio	No voltage at BATT+	Check voltages at
(POWER LED	or REM terminals,	amplifier terminals
is off)	or bad or no ground	with VOM
	connection
No audio	DC voltage on	Amplifier may need
(PROTECT LED	amplifier output	service; see enclosed
flashes every		warranty card for
4 sec.)		service information
No audio	Amplifier is	Make sure amplifier
(PROTECT	overheated	cooling is not blocked
LED is on)		at mounting location;
		verify speaker-system
		impedance is within
		specified limits (see
		“Specifications” on the
		next page)
No audio	Voltage less than 9V on	Check vehicle
(PROTECT	BATT+ connection	charging system for
and POWER		defective voltage
LEDs flash)		regulator
I-E/OPT LED	Amplifier is being	Check INPUT
is on all times	overdriven	LEVEL setting;
(not flashing)		see previous page
No audio	Voltage more than 16V	Check vehicle
(PROTECT	or less than 8.5V on	charging system for
LED is on)	BATT+ connection	defective voltage
	regulator
Distorted audio	Input sensitivity is	Check INPUT
	not set properly, or	LEVEL setting; or
	amplifier or source	check speaker wires

Lip

Neon

Tube

Neon Tube

and Clip

Clip Installing A Clip On Extrusion Lip (side view)

Clip Clip

Installed Neon Tube

Under Extrusion Lip

NEON

To Neon

Power

Supply

To Neon

Power

Supply

	unit is defective	for shorts or grounds
Distorted audio	Short circuit in	Remove speaker leads
and PROTECT	speaker or wire	one at a time to locate
LED flashes		shorted speaker or
		wire, then repair
Music lacks	Speakers are not	Check speaker
“punch”	connected properly	connections for
		proper polarity

PROTECT POWER I-E OPT

Px600.2 Amplifier

(top view with clear cover off)

NEON Px600.2

Output/Power

End Panel

Figure 9.

Installing neon tubes in a JBL Px600.2 amplifier. Installation is similar for other models.

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