JL Audio J2320.4 Cooling Efficiency Considerations, Serial Number, Safety Considerations

Protect Your Hearing!

Installation Applications

Planning Your Installation

We value you as a long-term customer. For

This amplifier is designed for operation in

It is important that you take the time to read

that reason, we urge you to practice restraint in

vehicles with 12 volt, negative-ground electrical

this manual and that you plan out your

the operation of this product so as not to damage

systems. Use of this product in vehicles with

installation carefully. The following are some

your hearing and that of others in your vehicle.

positive ground and/or voltages other than 12V

considerations that you must take into account

Studies have shown that continuous exposure to

may result in damage to the product and will void

when planning your installation.

high sound pressure levels can lead to permanent

the warranty.

(irreparable) hearing loss. This and all other

This product is not certified or approved for

Cooling Efficiency Considerations:

high-power amplifiers are capable of producing

use in aircraft.

The outer shell of your JL Audio amplifier is

such high sound pressure levels when connected

Do not attempt to “bridge” the outputs of this

designed to remove heat from the amplifier

to a speaker system. Please limit your continuous

amplifier with the outputs of a second amplifier,

circuitry. For optimum cooling performance, this

exposure to high volume levels.

including an identical one.

outer shell should be exposed to as large a volume

While driving, operate your audio system in

of air as possible. Enclosing the amplifier in a

a manner that still allows you to hear necessary

small, poorly ventilated chamber can lead to

noises to operate your vehicle safely (horns,

excessive heat build-up and degraded

sirens, etc.).

performance. If an installation calls for an

enclosure around the amplifier, we recommend

Serial Number

that this enclosure be ventilated with the aid

In the event that your amplifier requires

of a fan. In normal applications, fan-cooling

service or is ever stolen, you will need to have

is not necessary.

a record of the product’s serial number. Please

Remote Turn-On

take the time to enter that number in the space

Connector

(pg. 6)

provided below. The serial number can be found

CH 1 & CH 2

CH 3 & CH 4

+12 V Power

Chassis Ground

on the bottom panel of the amplifier and on the

Speaker Outputs

Speaker Outputs

Fuses

Connector

Connector

amplifier packaging.

(pg. 9)

(pg. 9)

(pg. 5)

(pg. 5)

(pg. 5)

Serial Number:

30A

30A

CHANNEL 1 (L)

CHANNEL 2 (R)

CHANNEL 3 (L)

CHANNEL 4 (R)

FUSES

Made in China

Bridged

Bridged

Power Status

Channel Input

CH 1 & CH 2

Protection Status

Indicator

Selector

Preamp Input Jacks

Indicator

Bass Boost (pg.

11)

High-Level

(pg. 7)

Left & Right

(pg. 6) CH 3 & CH 4

High Level (pg.

11)Bass Boost

Control

Input Jack

Preamp Output Jacks Preamp Input Jacks

Input Jack

Control

(pg. 9)

(pg. 6,7)

(pg.

9)

(pg. 6)

(pg. 6,7)

(pg. 9)

Mounting the amplifier upside down is strongly discouraged.

If mounting the amplifier under a seat, make sure there is at least 1 inch (2.5 cm) of space above the amplifier’s outer shell to permit proper cooling.

Safety Considerations:

Your amplifier needs to be installed in a dry, well-ventilated environment and in a manner which does not interfere with your vehicle’s safety equipment (air bags, seat belt systems, ABS brake systems, etc.). You should also take the time to securely mount the amplifier so that it does not come loose in the event of a collision or a sudden jolt to the vehicle.

Stupid Mistakes to Avoid

• Check before drilling any holes in your vehicle

to make sure that you will not be drilling

through a gas tank, brake line, wiring harness or

other vital vehicle system.

• Do not run system wiring outside or underneath

the vehicle. This is an extremely dangerous

practice which can result in severe damage to

your vehicle and person.

• Protect all system wires from sharp metal

edges and wear by carefully routing them,

tying them down and using grommets and

loom where appropriate.

• Do not mount the amplifier in the engine

compartment, under the vehicle, on the roof

or in any other area that will expose the

amplifier circuitry to the elements.

			Channel 1 & 2 Controls
	Power						CH 3&4
							Input From
Bass Boost
						1&2 3&4
				High-Level Inputs
Off +12dB
	40	150			60 1.2k		min max
	Low-Pass				High-Pass
HP Off LP
Filter Mode		Filter Frequency (Hz)					Input Sens.

Pre-Outs

LEFT

RIGHT

Amplifier Inputs		Channel 3 & 4 Controls
CH 1 (Left)	CH 3 (Left)			Protect
					Bass Boost
			High-Level Inputs
					Off +12dB
		min max	60 1.2k	40 150
			High-Pass	Low-Pass	HP Off LP
CH 2 (Right)	CH 4 (Right)	Input Sens.	Filter Frequency (Hz)		Filter Mode

	Low-Pass Filter			Input Sensitivity		High-Pass Filter		Filter Mode
	Frequency Control			Control		Frequency Control		Selector
				(pg. 7)
Filter Mode		(pg. 8) High-Pass Filter			Input Sensitivity(pg. 8) Low-Pass Filter(pg. 8)
Selector			Frequency Control		Control		Frequency Control
(pg. 8)			(pg. 8)		(pg. 7)		(pg. 8)

2 JL Audio 3