G l o s s a r y . . .

dBu or dBv

The addition of a lower case ”u” or “v” after dB indicates an absolute scaling for the dB ratio. 0dBu (or 0 dBv) = 778mV or 0.778 Volts, and it has no regard for power or impedance. This term is widely used for expressing signal voltages in modern audio equipment with high input impedances and low output impedances. For dBv the same scale is used as for dBu above, except that 0dBV = 1.0 Volts.

Distortion

Any modification of a signal which produces new frequency components not present in the original. Harmonic distortion refers to added frequencies that are overtones to the fundamental frequency. Intermodulation distortion refers to added frequencies that are sum and difference values derived from the beating together of two frequencies.

Frequency

The repetition of a waveform. The unit of frequency is Hz, and 1 cycle per second is equal to 1Hz. The audio band is generally restricted to frequencies of 20Hz to 20,000Hz (20kHz).

Frequency Response

The equipment’s relative gain compared to frequency. Generally expressed as +/- a certain number of dBs from 20Hz to 20kHz.

Impedance

The AC equivalent of resistance and measured in ohms. It indicates the amount of drive required for an input, or the drive capability of an output, at a given signal level.

Level

The amplitude of a signal, measured in Volts or Decibels.

Line Level

Generally indicates a signal whose level is between -10 and +10dBu or -14 to +6 dBV. Mic level refers to levels around -40dBu.

Noise

The term given to any signals appearing at the output of a piece of equipment when no input signal is applied. Most commonly, noise takes the form of hum, buzz or hiss.

Octave

A logarithmic unit for expressing frequency ratios. Positive values indicate an increase and negative ones a decrease. One octave ‘up’ the scale is equivalent to double the frequency. One octave ‘down’ is equivalent to half the frequency.

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Crown Audio 21100 user manual DBu or dBv, Distortion, Frequency Response, Impedance, Line Level, Noise, Octave
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21100 specifications

Crown Audio 21100 is a high-performance power amplifier that has become a staple in the professional audio industry, revered for its reliability and sound quality. Designed for both live sound and fixed installation applications, this amplifier is particularly noted for its robust build and impressive technical capabilities.

One of the standout features of the Crown 21100 is its power output. With the ability to deliver an impressive wattage, it ensures that sound is not only loud but clear, making it ideal for a range of environments, including concert venues, theaters, and public address systems. The amplifier is capable of driving multiple speaker configurations without distortion, providing both headroom and clarity at high volumes.

In terms of technology, the Crown 21100 employs the patented Class I technology, which is known for its high efficiency and low heat generation. This means that the amplifier can operate for extended periods without overheating, making it especially suitable for demanding applications. Additionally, the Crown 21100 is equipped with advanced protection circuitry that guards against short circuits, thermal overload, and input signal clipping, ensuring longevity and reliability in various settings.

Another notable characteristic is the amplifier's versatility in connection options. The Crown 21100 is designed with multiple input configurations, including XLR and 1/4-inch TRS connectors, making it compatible with a wide array of audio sources. Furthermore, its balanced inputs help to minimize noise and interference, ensuring that the sound quality remains pristine even in challenging environments.

Crown Audio also places a significant emphasis on ease of use. The 21100 features intuitive front panel controls and indicators, which allow audio engineers to monitor levels and make adjustments quickly and efficiently. This user-friendly design is particularly beneficial during live performances, where quick decision-making is crucial.

In addition, the amplifier's rugged construction ensures that it can withstand the rigors of touring and extensive use. Its durable chassis is designed to resist the wear and tear associated with transport and installation, making the Crown 21100 a reliable choice for both rental companies and sound professionals.

In conclusion, the Crown Audio 21100 stands out in the competitive landscape of power amplifiers with its powerful output, advanced technology, versatile connectivity, user-friendly design, and rugged reliability. These features make it an exceptional choice for those seeking high-quality audio performance in professional settings.
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