DY N A M I C PO W E R ME A S U R E M E N T S

About the Dynamic Power Measurements

The Audio Graph PowerCube is a test instrument used to measure the output of an amplifier in accordance with IHF-202 industry standards. The IHF-202 standard is a dynamic power measurement and was developed as a means of measuring power in a manner that best represents the Real World operation of an amplifier. Many manufacturers, including Rockford Fosgate, at times will measure amplifier power into a fixed resistor (4 ohm, 2 ohm). While this method is useful in some types of evaluation and testing, it is not representative of an amplifier that is connected to a speaker and playing music.

Music

Music is dynamic; the sound waves are complex and constantly changing. In order to simulate this, the IHF-202 standard calls for the input signal to the amplifier to be a 1kHz bursted tone. This signal is input (on for 20 milliseconds) and reduced 20dB for 480 milliseconds. The signal is gradually increased in level until the amplifier's output exceeds 1% Total Harmonic Distortion (THD). At 1% distortion becomes audible, therefore, any power produced above that level is considered unusable. Many manufacturers represent their amplifiers' output power in excess of 10% distortion. They use many names for this measurement, such as Total Maximum Power or Maximum Output Power. This is not indicative of the actual usable output power.

Listening to Loudspeakers - Not Resistors

A loudspeaker is not a resistor. A resistor's value (resistance measured in ohms) is fixed. A loudspeaker's impedance is dynamic. It is constantly changing in value, dependent upon the frequency of the input signal. Therefore, measuring power with the amplifier loaded into a 4 ohm resistor is not the same as measuring power with the amplifier connected to a 4 ohm speaker. Most people do not listen to music through a resistor.

A 4 ohm speaker may experience a drop in impedance 4-6 times lower than its nominal (printed) impedance. A speaker will also create phase shifts in the signal that is passed through it. These phase shifts happen because a speaker is an inductor (voice coil) and a capacitor (compliance of the surround/spider), as well as a resistor (voice coil wire).

To simulate a speaker the Audio Graph PowerCube measures output power into 20 different loads. It tests at 8 ohms, 4 ohms, 2 ohms and 1 ohm. Each of these impedances is also tested at –60°, –30°, 0°, +30° and +60° phase angles. These different impedances and phase angles repre- sent the shifts in impedance and phase that can occur in a typical loudspeaker.

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Rockford Fosgate 360.6 manual DY N a M I C PO W E R ME a S U R E M E N T S, About the Dynamic Power Measurements, Music
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360.6 specifications

The Rockford Fosgate 360.6 is a sophisticated digital signal processor (DSP) designed to elevate the audio experience in vehicles. As part of Rockford Fosgate's commitment to high-quality sound, the 360.6 provides users with extensive control over their audio setup, making it an ideal choice for both audiophiles and casual listeners alike.

One of the standout features of the 360.6 is its impressive 6-channel processing capability. With six channels of input and output, this DSP allows for intricate control over multiple speakers and subwoofers, ensuring optimal sound distribution throughout the vehicle. This flexibility means that users can fine-tune their audio systems to suit their personal preferences and vehicle acoustics.

In addition to its channel configuration, the 360.6 is equipped with a range of audio tuning options. It includes a 30-band graphic equalizer, allowing users to adjust frequency response with precision. This feature enables users to enhance or minimize specific frequencies for a truly customized sound experience. Furthermore, the device supports time alignment, which helps to synchronize audio signals, providing a cohesive listening experience regardless of where the listener is located in the vehicle.

The Rockford Fosgate 360.6 also features an onboard Bluetooth connection, facilitating wireless streaming of music from smartphones and other devices. This modern connectivity option is complemented by the inclusion of AUX inputs and optical digital inputs, ensuring compatibility with various devices and audio sources.

Another notable characteristic of the 360.6 is its user-friendly interface, accessed through a dedicated software application. This allows users to configure settings, adjust parameters, and save custom presets effortlessly. The DSP can also be updated via firmware updates, ensuring compatibility with the latest audio technologies and features.

Durability is another hallmark of the Rockford Fosgate brand, and the 360.6 is no exception. Built with high-quality materials, it is designed to withstand the rigors of automotive environments while delivering consistent performance.

In conclusion, the Rockford Fosgate 360.6 is a powerful audio processing solution that combines advanced technology with ease of use. With its 6-channel processing, comprehensive tuning options, Bluetooth connectivity, and robust build, it stands out as an essential component for anyone looking to achieve premium sound quality in their vehicle. Whether you’re looking to enhance your car audio system or simply enjoy your favorite tunes on the road, the Rockford Fosgate 360.6 delivers an unparalleled listening experience.
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