Troubleshooting

Use the following guide to identify symptoms and solve problems. Make sure the vehicle’s electrical system is working properly and power is reaching the amplifier’s power connector.

Symptom

Likely Cause

Solution

No audio

Low/no remote on voltage

Check connections; turn-test turn-on voltage

 

Speakers are not connected

Check wiring; use VOM/DVM to measure speaker coil

 

or are blown

resistance

 

 

 

Distorted audio

Input sensitivity is not set properly

See Setting Input Sensitivity on page 5

 

 

 

Audio lacks “punch”

Speakers are wired with

Check polarity of connections; refer to Applications

 

wrong polarity

 

 

 

 

Audio cycles off and on;

A protection circuit is turning

Verify the following: off electrical system is between

amber protection LED

amplifier off and on

5 ~ 18 Vdc; temperature is not over 194°F (90°C);

(JBL badge on top panel)

 

no short circuits; speaker loads are not less than 2 ohms

is not lit

 

(4 ohms in mono)

 

 

 

Audio cycles off and on;

GAIN is set too high

Set Input Sensitivity correctly (see page 5)

amber protection LED

 

 

(JBL badge on top panel) is not lit

 

 

 

 

 

Fuse blows

Incorrect wiring or

Check connections; refer to Applications

 

short circuit

 

Declaration of Conformity

We, JBL Europe A/S

Kongevejen 194B

DK-3460 Birkerød

DENMARK

declare in own responsibility, that the products described

in this owner’s manual are in compliance with technical

standard:

EN 55 020/6.1988

Steen Michaelsen

JBL Europe A/S

Birkerød. DENMARK. 3/98

7

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JBL DA1002, DA6502, DA3504, DA4002 manual Troubleshooting, Symptom Likely Cause Solution

DA6502, DA4002, DA1002, DA3504 specifications

JBL has built a reputation for producing high-quality audio equipment, and their series of amplifiers, including the JBL DA3504, DA1002, DA4002, and DA6502, exemplifies this commitment to excellence. Each model caters to different needs and preferences, making them versatile options for audio enthusiasts.

Starting with the JBL DA3504, this 4-channel amplifier is designed to deliver powerful performance in a compact package. It boasts an output power of 50 watts RMS per channel at 4 ohms, ensuring that it can drive a variety of speakers efficiently. The DA3504 features a high-pass and low-pass filter, allowing users to customize sound output to match their audio preferences. Its sleek design and built-in LED indicators enhance both functionality and aesthetic appeal, making it a great addition to any audio system.

Moving on to the JBL DA1002, this amplifier is a 2-channel model that focuses on delivering exceptional sound quality. It offers 50 watts RMS per channel, ideal for smaller audio setups. The DA1002 is notable for its simple installation process and lightweight design, making it accessible for users who may not be audio experts. This amplifier also includes a variable low-pass filter, allowing users to enhance bass response and create a more immersive listening experience.

The JBL DA4002 is a powerful 2-channel amplifier that provides an output of 100 watts RMS per channel. This model is designed for those looking for higher output and is perfect for larger audio systems or when more power is needed to drive speakers effectively. With its durable construction and advanced circuitry, the DA4002 ensures reliable performance and minimal distortion, preserving audio quality even at higher volume levels.

Lastly, the JBL DA6502 stands out as a 2-channel powerhouse with an impressive 150 watts RMS per channel output. Designed for audiophiles who demand robust sound performance, the DA6502 integrates advanced features such as variable bass boost and a crossover network. Its exceptional build quality and efficient cooling system make it suitable for extended use without overheating, ensuring that every listening session is enjoyable.

Collectively, these JBL amplifiers – DA3504, DA1002, DA4002, and DA6502 – offer a range of features and output capacities suitable for various audio setups. Whether for casual listening or serious audio applications, JBL amplifiers continue to deliver reliable performance and impressive sound quality, making them a top choice for many audio enthusiasts.