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A/V features

  • Thursday, May 24, 2012
    Trick Or Treat? A Discussion Of Power Amplifier Specifications
    power amplifiers
    Tommy O’Brien 05/24 09:11 AM,
    Now that Class-D power amplifiers are common in professional audio, much attention has been directed toward their performance compared to conventional analog amplifiers. Let’s briefly address the question of what Class-D means in order to clear up any confusion, because marketing people have conjured up several fictitious designations. An amplifier that uses its output devices as switches is Class-D. It’s as simple as that. Everything else is analog, so “analog amp” means “not a switching amp.” The phrase “conventional amp”… View this story
    Filed in: AV • Feature • Poll • Study Hall • Amplifier • AV • Audio • Power

  • Tuesday, May 22, 2012
    Wiring The World: Miles And Miles Of Conduit
    interconnect
    Josh Thompson 05/22 01:49 PM,
    Sooner or later, regardless of our chosen path in pro audio, the worst happens: someone asks us to install a system. Even if our preferred gig involves a Prevost and chain motors, folks tend to assume that “sound is sound,” and if you are a professional in one area, you are surely qualified in all others. Even with no real hands-on install experience, most of us have no problem signing up for the occasional install gig. The gear looks the… View this story
    Filed in: AV • Feature • Study Hall • AV • Installation • Interconnect • Sound Reinforcement

  • Wednesday, May 16, 2012
    Church At Former Harley Davidson Factory Outfitted With NEXO Loudspeakers
    yamaha
    PSW Staff 05/16 07:47 AM,
    When LifePointe Christian Church in Elk Grove, CA was looking for a sound system to compliment a new location—a converted Harley Davidson showroom—it turned to the expertise of CCI Solutions of Olympia, WA, with project manager David McLain recommending NEXO PS15 loudspeakers for the 400-seat church. Specifically, the new system includes three PS15s and a flown NEXO CD18 subwoofer, all driven and controlled via a 4x4 NXAMP. “Pastor Chris Delfs sought out a new location where they would not only… View this story
    Filed in: AV • Live Sound • Church Sound • Feature • Poll • AV • Installation • Loudspeaker • Subwoofer

  • Tuesday, May 15, 2012
    Accuracy vs. Realism: Simulating The “Human” Side Of Audio Measurement
    human hearing
    Pat Brown 05/15 10:27 AM,
    The human auditory system is equipped with two inputs - left and right ears. This “binaural” processing system provides us with the ability to localize where sound is coming from, something that a one-eared listener would have difficulty in doing. Playback systems may utilize any number of channels to surround the listener with sound, but two channels is always enough to simulate the human listener. Recording enthusiasts have long discovered the benefits of stereo microphones. While not necessarily “human-like,” they… View this story
    Filed in: AV • Feature • Poll • Study Hall • AV • Audio • Installation • Measurement • Signal • Sound Reinforcement • System • Technician

  • Monday, May 14, 2012
    Fill-osophy 101: Using Fill Loudspeakers To Optimize Coverage, Localization & More
    image
    Tom Young 05/14 02:03 PM,
    A well-designed main/primary loudspeaker system is expected to provide clear and intelligible sound to the entire audience. Over the years our industry has benefitted from a steadily growing selection of types and configurations of primary loudspeakers to do this; they possess the specific characteristics (performance and physical) that we need in our base inventory, or for a given project, or to solve a specific problem. Many of these varied types of products are also available over a wide range of… View this story
    Filed in: AV • Feature • Poll • AV • Audio • Loudspeaker • Sound Reinforcement • System

  • Friday, May 11, 2012
    Wireless Primer: The Key Issues Of Digital Audio Transmission
    wireless
    Volker Schmitt & Joe Ciaudelli 05/11 04:16 PM,
    Digital is a buzzword that many presume solves all the technical issues we face today. More and more digital equipment, such as mixing consoles, audio signal processors, and the like, are used for several applications, as a digital audio signal chain offers many advantages. A digital signal on a wire (i.e., fiber optic cable) is easier to handle than on a copper wire because 48, 64, or more audio channels can be transported on one thin fiber optic cable. If… View this story
    Filed in: AV • Feature • Study Hall • AV • Audio • Signal • Wireless

  • Thursday, May 10, 2012
    More Than One Way: Alternatives To High-Voltage Audio Power Distribution
    image
    Pat Brown 05/10 06:01 PM,
    In audio terms, high voltage means that the output power of the amplifier is converted to a high-voltage/low-current signal for transmission over long distances and/or small wire gauges. The advantages of the method include low cost and rather “bulletproof” systems, and the downside is that the transformers required present yet another filter for the signal to pass through, often degrading the audio quality. Since loudspeaker lines should always be kept as short as possible, the ultimate realization of this involves… View this story
    Filed in: AV • Feature • Poll • Study Hall • Amplifier • AV • Interconnect • Power • Signal

  • Wednesday, May 09, 2012
    How It’s Made: Inside FaitalPRO, Driving Loudspeaker Driver Development
    faital pro
    Mike Clark 05/09 03:58 PM,
    Although a relative newcomer to the pro audio world, Faital, headquartered in San Donato, a suburb of Italy’s business capital Milan, has more than half a century of loudspeaker driver manufacturing to its credit. In 2006, the family-run concern launched FaitalPRO, a division of the company targeting the international pro audio market, which has grown by leaps and bounds since inception, as explained by FaitalPRO overseas sales manager Flavio Naggi, grandson of the company’s founder. “Although my father is company… View this story
    Filed in: AV • Feature • Study Hall • AV • Business • Loudspeaker • Sound Reinforcement • Subwoofer

  • Tuesday, May 08, 2012
    Understanding Sound System, Loudspeaker & Room Interactions
    signal room interactions
    Sam Berkow 05/08 05:35 PM,
    If one could listen to only the direct sound of a loudspeaker, the world would be a very different place! Unfortunately, free field listening, where you have no reflections, room modes or ambient noise, is hard to achieve in everyday life, so we listen to loudspeakers in real rooms. The interaction of a loudspeaker system and a room can be very complex to understand, model or measure! One way to measure this interaction is to measure the impulse response of… View this story
    Filed in: AV • Feature • Poll • Study Hall • AV • Audio • Digital • Education • Installation • Loudspeaker • Measurement • Signal • Software • System • Technician

  • Monday, May 07, 2012
    Factors Defining A “Good” Sound Reinforcement System
    image
    Bob Thurmond 05/07 06:23 PM,
    How many sound systems have been built and are in use? Many millions, for sure, and they’re found in all types of venues and for all kinds of programs. So one would think we’d know exactly how to do it by now. But there seems to be plenty of examples to prove that we don’t. Why should this be? What is it we don’t yet understand? Do we even know enough to know what we don’t know? Perhaps we should… View this story
    Filed in: AV • Feature • Poll • Study Hall • AV • Installation • Sound Reinforcement