Troubleshooting a System

The key to finding the problem in a misbehaving sound system is to isolate parts of that system in a logical fashion to track down the fault.

Description of the PROTECT system built into all Hifonics amplifiers

The diagnostic system will shut down the amplifier, until reset by turning the head unit off, and back on. This state of affairs will be indicated by the front panel PROTECT LED lighting up under the following conditions:

1 - A sort circuit on the loudspeaker leads.

2 - An internal amplifier fault that causes a DC offset on the loudspeaker output.

Should the amplifier go into protect mode, simply disconnect all RCA and speaker leads, while keeping +12 volt, power ground and remote leads connected.

1.Now turn the amplifier back on, and if the diagnostic LED lights, the amplifier has an internal fault.

2.If not, plug the RCA cables back, and reset the amplifier. If it goes into diagnostic now, the fault lies in the input, either with bad cables or source unit.

3.If the amplifier seems fine with RCA cables plugged in, connect the speakers, one at a time, and if one of the speakers or its wiring is faulty, it will activate the diagnostic system.

Amplifier heatsink overheating

The amplifiers will shut down when the heatsink temperature reaches 80 degrees centigrade, and turn back on once the unit has cooled down below that point. Causes of overheating:

1 - Inadequate cooling - relocate or remount to provide better natural airflow over the fins.

2 - Driving high power levels into low impedances - back off on the volume control, and/or make sure you are not loading the amplifier with less than the recommended loudspeaker impedance.

Low output power

1 - Check that level controls have been set up properly.

2 - Make sure that the battery voltage, as measured at the amplifier’s +12 volt and ground terminals, is 11 volts or more. 3 - Check all +12 volt and ground connections.

Fuses blowing

1 - The use of loudspeaker impedances below the recommended minimums will draw more current - check.

2 - A short on the main +12 volt cable from the battery to the vehicle chassis will cause the main fuse to blow.

3 - If an amplifier fuse blows continually, with only +12 volt, ground and remote leads connected, the amplifier may be faulty.

System does not turn on 1 - Check all fuses.

2 - Check all connections.

3 - Measure the +12 volt and remote turn on voltages at the amplifier terminals. If these are non existent or low, take voltage measurements at fuse holders, distribution blocks, the head unit’s +12 volt and remote leads to localize the problem.

Noise problems

System noise can be divided into two categories, hiss, and electrical interference.

Hiss, or white noise

1 - High levels of white noise usually occurs when amplifier level controls are turned up too high - readjust according to the procedures in section ”Setting up systems after installation for best performance”

2 - Another major problem that can cause excessive hiss, is a noisy head unit - unplug the amplifier input RCA cables, and if the hiss level reduces, the source unit is at fault.

Electrical interference

The inside of an automobile is a very hostile electrical environment. The multitude of electrical systems, such as the ignition system, alternator, fuel pumps, air conditioners, to mention just a few, create radiated electrical fields, as well as noise on the +12 volt supply and ground. Remember to isolate the problem - first unplug amplifier input RCA cables, if the noise is still present, check the speaker leads, if not, plug the RCA’s back, and investigate the source driving the amplifier, one component at a time.

A ticking or whine that changes with engine RPM:

1 - This problem could be caused by radiation pickup of RCA cables too near to a fuel pump or a distributor, for instance, - relocate cables.

2 - Check that the head unit ground is connected straight to the vehicle chassis, and does not use factory wiring for ground.

3 - Try to supply the head unit with a clean +12 volt supply directly from the battery +, instead of using a supply from the in dash wiring/fusebox.

A constant whine:

This type of noise can be more difficult to pinpoint, but is usually caused by some kind of instability, causing oscillations in the system. 1 - Check all connections, especially for good grounds.

2 - Make sure that no speaker leads are shorting to exposed metal on the vehicle chassis.

3 -RCA cables are notorious for their problematic nature, so check that these are good, in particular the shield connections.

We have also provided several videos that will help you with your battery, alternator and even Big 3 upgrades at www.youtube.com/maxxsonicsusainc .

ZRX600.4, ZRX2000.4, ZRX500.2, ZRX1000.4, ZRX1500.1D specifications

Hifonics has been a notable name in the world of car audio, renowned for delivering high-quality amplifiers that enhance the listening experience. Among their popular products are the ZRX series, which includes the ZRX3000.1D, ZRX2000.1D, ZRX1000.1D, ZRX1200.2, and ZRX1500.1D. Each of these amplifiers showcases innovative technology, robust power, and exceptional performance, catering to car audio enthusiasts seeking to upgrade their system.

The Hifonics ZRX3000.1D is a powerhouse, capable of delivering a staggering 3000 watts RMS at a one-ohm load. Designed with Class D topology, this amplifier is not only efficient but also outputs minimal heat, allowing for prolonged use without the risk of overheating. It features a variable low-pass filter and a remote bass control, enabling users to fine-tune the sound according to their preferences. The MOSFET power supply and full-range capabilities further enhance the ZRX3000.1D’s reputation as a top-tier amp in its class.

Moving down the line, the ZRX2000.1D offers an impressive 2000 watts RMS, making it suitable for serious bass enthusiasts. It is equipped with similar technological advancements as its larger counterpart, including adjustable input sensitivity and a bass boost feature, which provides additional deep tones for an immersive audio experience.

For those who need something a bit smaller, the ZRX1000.1D delivers 1000 watts RMS. It’s an excellent choice for mid-range builds, combining efficient power delivery with affordability. The ZRX1000.1D maintains sound clarity at higher volumes, ensuring that music remains crisp and dynamic.

The Hifonics ZRX1200.2 stands out as a two-channel amplifier, offering 1200 watts RMS. This amp is designed to drive both speakers and subs, making it an ideal choice for those looking to create a balanced sound system. Its dual channel provides flexibility in system design, allowing for complex setups without sacrificing sound quality.

Lastly, the ZRX1500.1D is another impressive option, featuring 1500 watts RMS output. This model is particularly known for its durability and performance, providing robust power with a well-designed cooling system to prevent overheating.

In conclusion, the Hifonics ZRX series amplifiers—ZRX3000.1D, ZRX2000.1D, ZRX1000.1D, ZRX1200.2, and ZRX1500.1D—herald a new era of car audio. With their advanced features, efficient power handling, and exceptional sound quality, these amplifiers are designed to meet the demands of audiophiles, delivering an unmatched listening experience on the road. Whether for deep bass or full-spectrum sound, Hifonics has something to offer for everyone.