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A/V features

  • Friday, December 09, 2011
    image
    Gary Zandstra 12/09 02:19 PM,
    Let’s pretend . . . Imagine you walk into your next committee meeting and to your amazement discover that they have approved your suggestion to seek bids for a new sound and video system.  You leave the meeting excited!  Finally all of you problems will go away.  No more buzz, no more hum, no more having to dim the lights and shut all the shades just to barely make out what you are projecting on the screen!  You figure by… View this story
    Filed in: Church SoundFeatureBlogGary Z's Church SoundPollStudy HallAVEducationInstallationLoudspeakerMixerSignalSound ReinforcementSystemAudio

  • Thursday, December 08, 2011
    image
    PSW Staff 12/08 11:41 AM,
    A single Christmas tree deployed last year in downtown Guatemala City proved so popular that it inspired a nationwide effort, with 25 more cities in the Central American nation of Guatemala outfitted this year with trees of their own. Now, at 150 feet tall, the original wasn’t your average Christmas tree, and neither are its descendents, both in terms of their scale as well as a unique ability to provide audio programming that is synchronized with millions of LED lights.… View this story
    Filed in: AVFeaturePollAVInstallationLoudspeakerSound Reinforcement

  • Tuesday, December 06, 2011
    systems
    Ethan Wetzell 12/06 03:06 PM,
    While the topic of audio media transport has been (and continues to be) examined extensively, the area of control standards has not been as adequately addressed. As a result, Open Control Architecture (OCA) is being developed and promoted by the OCA Alliance, a group of nine audio manufacturers working toward the goal of creating an open public standard for control operations of media networking devices. Previously (here), I discussed the scope and goals of OCA, but there is another question… View this story
    Filed in: AVFeaturePollAVEthernetNetworking

  • Friday, November 18, 2011
    cone drivers
    PSW Staff 11/18 08:43 AM,
    (Editor’s Note: Eminence Speaker LLC contributed to this report.) Cone drivers (also referred to as woofers and transducers in this article) are not overly complex. When an electrical current passes through a wire coil (the voice coil) in a magnetic field, it produces a force that varies with the current applied. The cone, connected to the voice coil, moves in and out, creating waves of high and low air pressure. The coil and magnet assembly are the “motor structure” of… View this story
    Filed in: AVFeaturePollSlideshowStudy HallAmplifierAVLoudspeakerManufacturerMeasurementPowerSignalSound ReinforcementSubwooferAudio

  • Thursday, November 17, 2011
    image
    Pat Brown 11/17 01:51 PM,
    9V Transmitter For the 9V transmitter I used the Shure SC1-TA. It has a relatively low current drain (50mA) that remains relatively constant with increasing time until the battery voltage is insufficient (6.5V) to keep the unit on. This is a VHF system. AA Transmitter For the AA testing I used the Lectrosonics SM. It is an ultra-miniature digital hybrid UHF transmitter than runs from a single AA cell. The current draw is voltage-dependent. The transmitter turns off when the… View this story
    Filed in: AVFeaturePollAVPowerSignalWirelessAudio

  • Monday, November 14, 2011
    microphones
    Craig Leerman 11/14 04:11 PM,
    Long ago, an old sound guy imparted to me words of wisdom about the optimum way to mic instruments: “Pick your best microphone, put it on your best stand, place it in the best spot, point it in the best direction, and hope for the best.” That statement seems a bit trite, but it also contains truth. So where do we start in this pursuit of the “best” in all aspects of instrument mic’ing? While it’s true that vocal mics… View this story
    Filed in: AVFeaturePollSlideshowAVMicrophoneSound ReinforcementStage

  • Friday, November 04, 2011
    avb
    Ethan Wetzell 11/04 09:49 AM,
    The professional audio industry in 2011 has been abuzz yet again with a recurring theme that I like to refer to as the “can’t we all just get along?” conversation. As in years past, the topic of unifying standards between different manufacturers’ equipment to make exchange of information easier and more seamless was everywhere. This has been going on for some time, and has lived under different names and terms: “interconnectivity,” “convergence,” and the most recent model, “interoperability.” However, this… View this story
    Filed in: AVFeaturePollAVEthernetInterconnectNetworkingSignal

  • Friday, October 28, 2011
    fiber optics
    John Lopinto 10/28 02:11 PM,
    With the increasing trend toward the use of fiber instead of co-ax cable in a wide range of applications, most contractors are now required to understand the basics of terminating and laying fiber optic cable. Contrary to its reputation, fiber is actually quite easy to handle and use. Cable Construction Fiber, at its most basic level, is a very pure strand of glass through which light can pass over great distances. All fiber optic cable has at its center a… View this story
    Filed in: AVFeaturePollAVDigitalEthernetInstallationInterconnectNetworkingSignalAudio

  • Monday, October 24, 2011
    amplifiers
    PSW Staff 10/24 02:15 PM, 0 Comments
    The common “wisdom” just a few years ago was that the emergence of self-powered loudspeaker lines with enclosure-mounted amplifiers and protection circuitry tuned specifically for the loudspeaker meant the days of rack-mounted power amplifiers were numbered. But it’s funny the difference that innovation can make. Today’s amplifier is a powerhouse, light years removed from the huge, heavy and inefficient designs of the recent past. Current designs are also far lighter, and in some cases, come in a compact package that… View this story
    Filed in: AVFeaturePollSlideshowAmplifierAnalogAVDigitalSound Reinforcement

  • Tuesday, October 18, 2011
    interconnect
    Pat Brown 10/18 01:01 PM,
    Almost every Syn-Aud-Con seminar has attendees from other technical fields that need to learn about sound systems and audio. These fields include networking, telephony, lighting, electrical and others. Many tell us that audio is the most confusing thing they have encountered in their technical careers – and it is no wonder. Consider the input types that may exist on a mixing console. I found all of these on units sitting around the shop. There are nine (9) analog topologies and… View this story
    Filed in: AVFeaturePollAnalogAVDigitalEthernetInterconnectNetworkingSignal