Convection-Only Models | Crown Audio 133472-1A instruction

Chapter 1: Crown Ampliﬁers In-Depth

Overheating

Because of the wide range of operating conditions your amplifer might be sub- jected to in the ﬁ eld, you should con- sider each installation independently to ensure the best thermal performance. If your amp starts to overheat, consider the following possible causes:

1. Insufﬁcient air movement.

2. Overdriving of the input stage (severely into clip).

3. Very low-impedance loads.

4. High ambient temperatures.

sides) is not blocked or covered by cables. Also, if your Crown amp has foam ﬁ lters, they can be cleaned with mild dish detergent and water when needed.

The side walls of the rack should be at least 2 inches (5 cm) away from the chassis for amps with side venting as shown in Figure 1.1.

Don’t use vented spacer panels between amps in a rack. Because of the airﬂ ow technology we use in our amps, it is best to stack multiple ampliﬁ ers on top of each other with no space between.

The ampliﬁ er draws fresh air into the front of the amp and exhausts it either out the sides and into the rack, or out the back depending on the model. We want the hot air that’s in the rack to vent out the sides or back—not the front. If any of these ampliﬁ ers are spaced apart with vented panels, some of the preheated air will recycle to the front of the rack and back into the ampliﬁer. The result

is loss of thermal headroom. If you choose to place the ampliﬁ ers with space between them, then use solid panels between them, not vented panels.

You should provide adequate airﬂ ow within the rack. Additional air ﬂow may be required when driving low impedance loads at consistently high output levels or for higher power models. Refer to your Crown ampliﬁ er’s Operation Manual for detailed information on ther-

mal dissipation.

If your rack has a front door that could block air ﬂ ow to the ampliﬁ er’s air intakes, you must provide adequate air

ﬂow by installing a grille in the door or by pressurizing the air behind the door. Wire grilles are recommended over

perforated panels because they tend to cause less air restriction. A good choice for pressurizing the air behind a

rack cabinet door is to mount a “squirrel cage” blower inside the rack (Option 1 in Figure 1.2). At the bottom of the rack,

mount the blower so it blows outside air into the space between the door and in front of the ampliﬁ ers, pressurizing the

“chimney” behind the door. This blower should not blow air into or take air out of the space behind the ampliﬁ ers. For racks without a door, you can evacu- ate the rack by mounting the blower at the top of the rack so that air inside the cabinet is drawn out the back (Option 2 in Figure 1.2).

If the air supply is unusually dusty, you might want to pre-ﬁ lter it using com- mercial furnace ﬁ lters to prevent rapid loading of the unit’s own air ﬁ lter.

1.1.2 Convection-Only Models

When racking convection-cooled ampliﬁ ers, it is best to leave one rack-space between amps because this type of ampliﬁer needs space to radiate the heat.

Ampliﬁer Application Guide

Figure 1.2

Extra Cooling with a Rack-Mounted Blower

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.