Fault Monitoring, Setting, System Gain

Chapter 1: Crown Ampliﬁers In-Depth

Figure 1.31

RJ Jack Wiring and Pin Assignments

Figure 1.32

Optimal System Headrom.

1.5 Fault Monitoring

The Fault (RJ-11) jack, which looks

like a telephone plug, is located

on the back of your ampliﬁ er (if equipped). It gives you an easy way

to remotely monitor the ampliﬁ er’s fault status. To set up a circuit that will cause an LED to light whenever a fault status occurs, you can simply use the suggested circuit shown in Figure 1.30.

When using this circuit, the LED will glow whenever the ampliﬁ er is in one of four states: a channel’s heatsink has reached its temperature limit, the trans- former has reached its temperature limit, the ampliﬁ er has just been turned on and is in its turn-on-delay mode, or the ampliﬁ er is turned off.

If you choose to design your own circuit to interface this signal to your system, note that this RJ jack is polarity sensitive. Pin 2 must be grounded, and Pin

5 must be supplied with a positive voltage pull up (positive with respect to ground). Refer to Figure 1.31 for RJ jack pin assignments. Note: the mating connector for the RJ-11 jack contains 4 contact pins in a six-slot case, as shown in Figure 1.31. The maximum signal that can be exposed to the fault jack is 35 VDC and 10 mA. Best results are obtained with 10 mA LEDs.

Available

1.6 Setting

System Gain

Headroom

Gain

Amplifier

Structure

Headroom

Potential

To get the best performance

from your sound system, you

should carefully set up your

system’s gain structure. Gain

structure is a term that refers

Amplifier

to the way the various levels

are set at each stage of your

sound system. Good gain

Outboard

structure lets you get your

intended signal out with the

Processing

Mixer

most available headroom, and

Output

the least amount of noise.

Mixer

This section provides a basic

Input

procedure to use to set up you

system’s gain structure, designed to get you up and running as quickly as possible. We could go into much more detail on this subject, but that would be beyond the scope of this manual. If you have questions about system gain structure, refer to the Appendix for a list of recommended publications for further reading.

Ampliﬁer Application Guide

133472-1A specifications

Crown Audio 133472-1A is a sophisticated and highly regarded power amplifier designed for professional audio applications. Known for its reliability and high performance, the 133472-1A is favored by sound engineers, musicians, and event organizers who seek exceptional audio clarity and robust amplification.

One of the standout features of the Crown Audio 133472-1A is its impressive power output. This amplifier is capable of delivering substantial wattage, ensuring that it can effortlessly drive a variety of loudspeaker systems without distortion, even at high volumes. This makes it particularly suitable for large venues, concerts, and public gatherings where sound coverage is critical.

The 133472-1A utilizes advanced technologies to enhance its performance. For instance, it incorporates a patented output stage design that minimizes distortion, allowing for a cleaner and more accurate sound reproduction. This is especially important in professional audio environments where audio fidelity is paramount. Additionally, the amplifier features sophisticated thermal management systems that prevent overheating, ensuring reliable operation during extended use.

Another key characteristic of the Crown 133472-1A is its versatility. It is engineered to work seamlessly with a range of audio sources, making it an ideal choice for various applications, including live performances, installations, and broadcasting. Its multiple input options, including XLR and TRS connectors, allow for flexible connectivity options, accommodating various audio setups.

Durability is also a significant aspect of the Crown Audio 133472-1A. Constructed with high-quality materials and robust components, this amplifier is built to withstand the rigors of professional use. Its rugged chassis design provides added protection, making it suitable for both touring and fixed installations.

Furthermore, the Crown 133472-1A offers user-friendly features such as intuitive controls and indicators, allowing users to monitor performance easily. This includes LED status indicators that provide real-time feedback on operation, making it simple to troubleshoot any issues.

In summary, the Crown Audio 133472-1A is a powerhouse amplifier that combines high output, advanced technologies, and durable construction. Its versatility makes it a preferred choice for professionals seeking reliable and superior audio performance in live and installed environments. Whether for music events, speeches, or any high-stakes audio requirements, the 133472-1A delivers the quality and performance essential for exceptional sound.