Star topology

Advantages: greater network size—up to 200 meters (656 feet); high reliability; readily expandable; uses standard Ethernet patch cables

Disadvantages: higher cost

Add nodes—i.e., RAVE units—to the previ- ous net layout and you have the classic star

topology. This name comes from the hub being at the center and the nodes radiating out from it like the points of a star. It doesn’t matter if the nodes are actually right next to one another while the hub is in another room—it’s still a star topology. You can

connect as many RAVE units as there are ports on the hub.

Star network topology

Distributed star topology

Advantages: greater network size; high reliability; readily expandable; uses standard Ethernet patch

cables

Disadvantages: higher cost

What do you do when you have more RAVE units than available hub ports? Add more hubs, of course. Most Fast Ethernet hubs now are stackable, either through an uplink port that lets you connect an additional hub to one already in the network, or through a backplane connection. The resulting network topolgy is called a distributed star, because it is made up of interconnected multiple stars. The maximum UTP cable length from hub to hub, or from hub to RAVE unit, is 100 meters (328 feet).

The example shown on the following page uses three hubs. The maximum size of this particular CobraNet network would be 400 meters (1312 feet), allowing two 100-meter cable runs among the three hubs, plus 100-meter cable runs on the end hubs.

You can expand the distances even further by daisy-chaining more hubs and cable segments. There are technical and practical limits to this strategy; see the section on network limitations for further information.

LONGER DISTANCE THROUGH FIBER

Sometimes a network may span long distances without any practical need for hubs distributed along the way. The computer networking industry, on whom we’re already relying for an economical and rugged transport medium, has an answer to this need also: fiber optics.

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QSC Audio RAVE 188, RAVE 81, RAVE 161, RAVE 160, RAVE 88, RAVE 80 user manual Star topology, Longer Distance Through Fiber
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RAVE 88, RAVE 81, RAVE 161, RAVE 160, RAVE 80 specifications

QSC Audio has been a leading name in professional audio equipment, known for its innovative technologies and high-performance solutions. The RAVE series is one of their hallmark offerings, designed specifically for a variety of sound reinforcement applications. The main models in the RAVE lineup include the RAVE 81, RAVE 188, RAVE 88, RAVE 160, and RAVE 80, each catering to distinct needs while embodying QSC's commitment to quality and reliability.

The RAVE 81 is a powered loudspeaker delivering impressive sound reinforcement capabilities. With a robust 8-inch woofer and a high-frequency driver, the RAVE 81 ensures full-range audio reproduction. It features integrated QSC amplifiers, which optimize performance for both live sound and installed applications. The speaker also includes versatile input options, making it easy to connect various audio sources, whether in a concert hall or a corporate event.

For larger venues, the RAVE 188 excels with its dual 18-inch woofers, providing deep, powerful bass response crucial for bass-heavy genres. This subwoofer is built with advanced DSP (Digital Signal Processing), ensuring precise tuning for various acoustical environments. The RAVE 188's rugged construction makes it ideal for both touring and fixed installations, ensuring durability under challenging conditions.

The RAVE 88 is a versatile solution featuring dual 8-inch woofers. This model is perfect for applications requiring clear vocal reproduction and balanced sound across a wide range of frequencies. The RAVE 88 is equipped with QSC's intelligent EQ algorithms, which allow users to tailor the sound according to specific venue acoustics, enhancing the overall listening experience.

The RAVE 160 is engineered for high-traffic installations, providing a compact form factor without compromising audio quality. With a full-range design, it combines an efficient woofer and tweeter configuration, making it suitable for both speech and music applications. The RAVE 160 is particularly popular in educational settings and retail spaces due to its unobtrusive design and exceptional intelligibility.

Finally, the RAVE 80 rounds out the series as a highly portable loudspeaker. Its lightweight design makes it easy to transport and set up, which is ideal for mobile DJs, smaller venues, or casual outdoor events. Despite its size, the RAVE 80 delivers impressive audio performance, with a clear and balanced sound that belies its compact nature.

In conclusion, the QSC RAVE series, including the RAVE 81, RAVE 188, RAVE 88, RAVE 160, and RAVE 80, showcases a blend of advanced technologies, thoughtful design, and exceptional audio performance, making them suitable for a wide range of applications in the professional audio landscape. Whether for touring, installation, or portable use, the RAVE models represent robust solutions in sound reinforcement.
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