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G l o s s a r y

In this section many of the terms used throughout this manual are explained in more detail.

Active

Active electronic circuits are those which are capable of voltage and power gain by using transistors and integrated circuits.

Amplitude

Refers to the voltage level or intensity of a signal, and is usually measured in volts or decibels.

Balanced

A three wire connection in which two of the wires carry the signal information, the third acts as a shield tied to chassis ground. The two signal lines are of opposite polarity (out of phase by 180 degrees) at any given moment in time, and are of equal potential with respect to ground. Balanced connections are used to help reject induced hum and noise in system interconnections.

Binding Post

A type of connector that maybe used for either a bare wire or a wire terminated in a 4mm plug.

Bridge Mode

This applies to a method of combining two power amplifier channels to make one channel capable of providing approximately twice the power into a single load. This load must be connected across the two positive channel outputs.

Clip or Clipping

The term used to describe an overdrive condition in a piece of equipment. A clipped signal is distorted and will sound harsh. Applying a heavily clipped signal to a loudspeaker, whilst not unduly affecting the amplifier, may cause speaker damage.

dB

A unit for expressing the ratio between two signal levels for comparison purposes. On its own it has no absolute level meaning. Rather, it is a logarithmic ratio used to express the differences between two amounts or levels. Positive numbers indicate an increase, and negative ones a decrease.

Some useful ratios are:

+3dB = Double Power

+6dB = x 2 Voltage or x 4 Power +10dB = x 3 Voltage or x 10 Power +20dB = x 10 Voltage or x 100 Power

dBm

The addition of ‘m’ after dB indicates an absolute scaling for the dB ratio. Instead of a ratio, the dB becomes a measure of voltage. 0dBm = a power level of 1 milliwatt into a load of 600 ohms. It is also loosely used to describe signal voltage in 600 ohm circuits.

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Crown Audio 21100 user manual O s s a r y
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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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