Low Impedance Indicator

AM II circuitry will lower output power to maintain uninterrupted operation whenever the amplifier senses an impedance load of less than 2 Ohms. The Low Impedance Indicator (left-side end panel) is provided to let you know when the amplifier is operating in this mode. It is important to note that there is no increase in output power below the 2 Ohm threshold. Maximum power is achieved at 2 Ohms.

In the case of a short circuit, AM II will engage to protect the shorted channel but will continue to play the unaffected channel. When this occurs, audible distortion will be heard. Turn-off the system and repair the short. Once the problem has been repaired, the amplifier will return to normal operation.

System Tuning

In order to achieve maximum signal-to-noise performance from a high quality mobile sound system, it is desirable to use high signal levels wherever possible in the interconnection cables. High signal levels will reduce the effect of induced noise. The peak level of an audio signal is usually determined by the clipping level of electronic components. The following procedure should be used as a guide when the system installation is complete.

Adjusting Equalizer Input Gains:

1.Turn the equalizer's volume control to minimum.

2.Turn the source unit volume 1/2 to 3/4 of maximum. If available on your unit, set the output level to maximum. Some units may have a switch.

3.If available, set selector switch to either input 1 or input 2.

4.Adjust all equalizer input gains to minimum.

5.For the chosen input play the respective music source. A loud music passage is desired.

6.For the chosen input, increase the left input gain control until the onset of audible distortion. Then decrease the gain prior to the immediate point of audible distortion. This setting will minimize system background noise and prevents overloading of the equalizer. Adjust, for the same input, the right input gain control for proper left / right balance.

7.Set selector switch to the alternative source unit, if used, and repeat steps 5 and 6.

8.Adjust crossover next.

Adjusting Crossover Input Gains:

1.Adjust all crossover gain controls to 0 dB, 1/2 of maximum sensitivity.

2.Adjust all amplifier gains to 1/2 of maximum sensitivity.

3.Turn the volume knob on the equalizer to a maximum of 3 o'clock.

4. Increase the gain of the crossover until the onset of audible distortion. Then decrease the gain prior to the immediate point of audible distortion. This setting will minimize system background noise and prevents overloading of the crossover.

5. Repeat step 4 for any remaining crossovers in the system.

6. Adjust the input gains next.

NOTE: In manu multi-crossover / accessory systems, the gain of some crossover and accessories may need to be further decreased to achieve proper balance.

Adjusting the Amplifier's input Gain:

1.Adjust the amplifier's input gain to 1/2 maximum sensitivity

2.Turn the volume knob on the equalizer to a maximum of 3 o'clock

3.Increase the gain (clockwise) until the onset of audible distortion. Then decrease the gain counterclockwise prior to the immediate point of audible distortion. This setting will minimize system background noise and prevents overloading of the amplifier.

4.Repeat step 3 for any remaining amplifiers in the system.

NOTE: Depending on the sensitivity of the system's preamp(s), the gain of the amplifier(s) may not need adjustments. Also, in many multi-amplifier systems, the gain of some amplifiers may need to be further decreased to achieve proper balance.

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Clarion A1200.2, A600.2, A404.2, A300.2, A100.2, A204.2, A200.2 owner manual System Tuning, Low Impedance Indicator
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A200.2, A204.2, A100.2, A1200.2, A300.2 specifications

The Clarion A-Series amplifiers, including the A300.2, A1200.2, A200.2, A600.2, and A404.2, are designed to enhance the audio experience in vehicles. Each model in this series offers unique features, technologies, and characteristics that cater to different audio needs and preferences.

The Clarion A300.2 is a compact yet powerful amplifier, capable of delivering 75 watts per channel at 4 ohms and up to 150 watts per channel at 2 ohms. It features a high-quality aluminum heat sink that ensures efficient heat dissipation, which enhances longevity and performance. This model also includes a built-in low-pass filter, which allows users to tailor their sound experience by controlling the frequency range being amplified.

Next in the lineup is the A1200.2, which is geared towards audiophiles seeking deeper bass and superior sound fidelity. This amplifier pushes out 120 watts per channel at 4 ohms and 240 watts at 2 ohms. One of its standout features is the variable bass boost, allowing users to adjust the low-frequency response to suit their listening preferences. The A1200.2 also integrates a sophisticated speaker-level input for easy installation in factory systems.

The A200.2 is oriented towards smaller setups and narrower spaces, offering 50 watts per channel at 4 ohms and 100 watts at 2 ohms. Its compact design doesn’t compromise on power, making it an excellent choice for those looking to build a more modest but high-quality audio system. It features a low-pass filter and high-pass filter, allowing for flexibility in system configurations.

Moving on to the A600.2, this amplifier is designed for larger audio systems. Delivering an impressive 300 watts per channel at 2 ohms, it accommodates a wide range of speaker setups. The A600.2 boasts exceptional sound clarity, thanks to its advanced circuit design that minimizes noise interference. It includes an adjustable crossover, enabling users to fine-tune the frequency ranges for optimal sound performance.

Lastly, the A404.2 is a versatile four-channel amplifier that can be utilized for both full-range speakers and subwoofers. Delivering 75 watts per channel at 4 ohms and 150 watts at 2 ohms, the A404.2 offers flexibility for different configurations. Its bridgeable channels make it possible to convert the four channels into two powerful outputs, perfect for driving larger subwoofers.

In summary, the Clarion A-Series amplifiers provide an array of features catering to diverse audio requirements. With a focus on sound clarity, flexible configurations, and efficient designs, these amplifiers are suitable for anyone looking to elevate their vehicle's audio system.
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