AC Fuse, Clip Limiters, Troubleshooting

AC Fuse

Your amplifier is supplied with a rear panel mounted main AC fuse. This main fuse may need replacement if the unit will not turn on. Never replace the the main fuse with other than the one indicated.

Clip Limiters

Your amplifier is equipped with a unique clip limiting circuit. If the amplifier is driven beyond the point of maximum output the clip limiting circuit will engage and prevent potentially damaging distortion from reaching your loudspeakers. The amplifier will continue to operate with no apparent change in performance. This feature is automatic and requires no adjustment or maintenance.

Protection Circuitry

Your ATI amplifier uses an advanced optically coupled protection circuit that does not require fuses and is completely isolated from the audio path. In the event that the amplifier senses a shorted speaker wire the protection circuit will engage shutting down the output and will sample the state of the amplifier every 7 seconds (nominal). The output will be cut off as long as the short exists. The amplifier will begin to operate normally after the shorted situation is repaired.

If this should happen, first check all speaker wire connections, both at the speakers themselves and at the speaker terminals on the back of the amplifier to make certain that none of the strands from any channel touch another channel, and that none of the strands from a "positive" terminal touch those from a "negative" terminal. Even a few stray wire strands can cause the unit to go into the protection mode. After checking all speaker connections, turn the unit back on. If it continues to turn off, check your speakers to verify that they are operating properly. If all other potential sources of trouble check out properly, contact ATI for further assistance and information.

ATI Service Information

The AT602 and the AT1202 do not contain any user serviceable parts inside. If you suspect a problem that may require service assistance, contact us at amptech@ix.netcom.com, or by phone at 888-777-8507. It is important that only an authorized service agent carry out any repairs. This will assure proper service and preserve the protection of your Limited Warranty. Keep your sales slip or receipt in a safe place with this manual so that it will be available to verify the purchase date, should you experience a problem covered by our warranty.

Care, Maintenance and Cleaning

When the unit becomes dirty, wipe it with a clean, soft, dry cloth. If necessary, first wipe the surface with a slightly dampened soft cloth with mild soapy water, then with a fresh cloth dampened with clean water. Wipe dry immediately with a dry cloth.

NEVER use benzene, thinner, alcohol or any other volatile cleaning agent. Do not use abrasive cleaners, as they will damage the finish of the metal parts. Avoid spraying insecticide, waxes, polishing agents, or any aerosol product near the unit.

Troubleshooting

Your ATI amplifier is designed for trouble free operation.

If you follow the instructions in this manual you should enjoy many years of high quality listening enjoyment. However, as with any sophisticated electronic device, there may be occasional problems upon initial installation, or during the life of the unit. The items on the list below are a brief guide to the minor problems that you may be able to correct yourself. If these solutions do not rectify a problem, or if the problem persists, contact us for assistance.

Problem	Solutions

Amplifier will not turn on	Master Power Switch tuned off (No power light LED).
	Turn on Master Power Switch.

Amplifier will not turn off.	Remote trigger cable not properly connected.
	Verify connection of trigger cable at both ends.

Amplifier turns on, but no audio from one or more channels.	Input plugs not connected to proper jack or are loose.
	Check input connections.

No audio from one or more channels.

Speakers not connected properly.

Check speaker connections at amp and speaker.

Audio levels differ.	Improper settings or output levels from source device.
	Check the settings on your preamp, processor or controller.
	Also check settings of the rear panel gain conrols on your amp.

Audio plays, then cuts off.	Amplifier shorted.
	Check speaker connections for short circuit at amp and speaker.

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AT1202, AT602 specifications

The Amplifier Tech AT1202 and AT602 are powerful audio amplification solutions that cater to both professional and home audio enthusiasts. Known for their cutting-edge technology and robust performance, these amplifiers stand out in the crowded marketplace of audio equipment.

The AT1202 is a high-performance amplifier delivering a staggering 1200 watts of power at 4 ohms. It is engineered to drive large speakers with ease, making it ideal for live sound applications and large venues. One of its notable features is its advanced thermal protection system, which prevents overheating during extended use, ensuring reliability even in demanding environments. Additionally, it incorporates a high-efficiency Class D architecture, providing exceptional power handling with minimized distortion, resulting in crystal clear sound.

The AT602, on the other hand, offers a more compact solution with 600 watts of power at 4 ohms. This amplifier is perfect for smaller setups, such as home theaters or studios, where space is at a premium without compromising audio quality. It features a full-range capability and an auto-sensing input that automatically detects the presence of a signal, eliminating the need for manual switching. The AT602 also includes an adjustable crossover, allowing users to tailor the frequency response to their specific audio requirements.

Both models are equipped with advanced digital signal processing (DSP) technology, which enhances audio quality by minimizing noise and optimizing performance. This technology allows for various configurations and presets, ensuring that users can achieve the best sound possible for their environment.

In terms of connectivity, the AT series amplifiers come with multiple inputs and outputs, including XLR, RCA, and speakON connectors, making them incredibly versatile for different audio setups. Their rugged construction and lightweight design make them easy to transport, while their sleek appearance fits well in both professional and home environments.

In summary, the Amplifier Tech AT1202 and AT602 are exceptional amplifiers that deliver high power and superior audio fidelity. Their combination of advanced technology, user-friendly features, and durable design makes them suitable for a wide range of applications, ensuring that audio enthusiasts receive quality performance whenever they need it. Whether in a professional audio setting or a personal listening space, these amplifiers are sure to impress with their reliability and sound quality.