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Thursday, January 13, 2011Meet The Winners Of The Second Annual Readers Choice Best Product Awards!
PSW Staff 01/13 08:04 AM, 0 CommentsThe votes have been tallied and the results are in for the Second Annual ProSoundWeb/Live Sound International Readers Choice Product Awards. Click here to view the winners! The participation of both manufacturers as well as our audience proved exceptional, with thousands upon thousands of ballots cast since voting started less than a month ago. The races in each category were close and competitive, owing to the overall strength of every product entered combined with the distinct yet varied preferences of… View this story
Filed in: AV • Live Sound • Recording • Church Sound • Feature • Poll • Product • AV • Consoles • Digital • Microphone • Signal • Sound Reinforcement • System • Audio -
Monday, January 03, 2011Which Impedance? Nominal Minimum / Maximum Average
Pat Brown 01/03 02:02 PM,The impedance of a loudspeaker characterizes the opposition that it presents to current flowing from the amplifier. The impedance is both complex and frequency-dependent. Complex means that it is not a pure resistance, but a combination of resistance and reactance. As a result, the voltage and current waveforms from the amplifier are not in-phase. Frequency-dependence means that the opposition to current flow varies with the applied frequency – a natural occurrence in a reactive load. The curve in Figure 1… View this story
Filed in: AV • Feature • Poll • Production • Audio • Analog • AV • Installation • Interconnect • Measurement • Signal • Sound Reinforcement • System -
Monday, December 13, 2010Why All The Fuss About Power?
Pat Brown 12/13 02:08 PM, 0 CommentsIt is generally accepted that a large loudspeaker power rating is a sign of quality and something to be desired. It may be the performance metric that has the greatest influence on the consumer’s buying decision. A closer look reveals that it is far less significant than other metrics regarding the performance of the loudspeaker. The Basics The power rating of an amplifier describes its ability to do work on a load – like moving a loudspeaker. Generally, the bigger… View this story
Filed in: AV • Feature • Poll • Amplifier • AV • Education • Installation • Interconnect • Power • Signal • Sound Reinforcement • System • Audio -
Tuesday, November 30, 2010The Nuances Of Crest Factor
Pat Brown 11/30 02:10 PM, 0 CommentsThe crest factor of an audio signal is the dB difference between the peaks and the RMS value of the signal. The RMS (Root Mean Square) is defined as the “heating value” of the signal - the voltage that would generate the same heat as a DC (Direct Current) signal, over the same time. The RMS value of a complex signal must be read with an RMS voltmeter. Alternatively, the signal can be digitally sampled and the samples summed to… View this story
Filed in: AV • Feature • Poll • Amplifier • AV • Education • Installation • Interconnect • Power • Signal • Sound Reinforcement • System • Audio -
Wednesday, November 17, 2010The Latest 129th AES Convention Products & Updates
PSW Staff 11/17 12:45 PM, 0 CommentsAmidst an economic backdrop which can hardly be considered positive, the 129th AES Convention stood out as a beacon of hope to members of the pro-audio industry around the world. Held November 4-7 in San Francisco’s Moscone Center, the attitude among vendors and attendees alike was remarkably positive. And why wouldn’t attendees be excited? Aside from the obvious swath of new products displayed within the walls of Moscone, there were countless hours of unique educational offerings set forth by the… View this story
Filed in: AV • Live Sound • Recording • Church Sound • Feature • Poll • Analog • AV • Consoles • Digital • Interconnect • Microphone • Monitoring • Networking • Signal • Sound Reinforcement • System • Audio -
Tuesday, November 16, 2010Far-Field Criteria For Loudspeaker Balloon Data
Pat Brown 11/16 01:20 PM, 0 CommentsThe most common reference distance for loudspeaker SPL specifications is 1 meter (3.28 feet). The choice is one of convenience – any distance will do. The 1m reference simplifies distance attenuation calculations by eliminating the division required in the first step: Loudspeakers must be measured at a distance beyond which the shape of the radiation balloon remains unchanged. The changes are caused by path length differences to different points on the surface of the device. These differences become increasingly… View this story
Filed in: AV • Feature • Poll • AV • Installation • Loudspeaker • Measurement • Sound Reinforcement • System • Audio -
Monday, October 25, 2010Tech Tip Of The Day: Balanced Power
PSW Staff 10/25 09:10 AM, 0 CommentsProvided by Sweetwater. Q: How does balanced power help to solve ground loop humming? A: Using balanced power can help solve certain ground loop problems because it takes its ground from one source, thus having no potential difference. You can do this yourself simply by taking all your power from one outlet or circuit. If your equipment “leaks” to the ground, meaning current is flowing to the ground wire, then balanced power might be helpful. Some people believe that… View this story
Filed in: Recording • Feature • Study Hall • AV • Digital • Installation • Power • System • Audio -
Friday, October 15, 2010A/V Profile: Systems Technology Comes To The Public Library
Keith Clark 10/15 07:31 AM,The classic definitions of a wide range of facilities are now being altered dramatically, thanks in large part to the development, and deployment, of constantly improving multimedia technologies. Case in point: The Herrick District Library, located in Holland, Michigan. It had long fit the time-honored role of what we’ve all come to think of with mention of the term “library” - that is, stacks and rows of books, along with healthy doses of periodicals and reference materials. However, an impressive… View this story
Filed in: AV • Feature • Poll • Amplifier • AV • Digital • Installation • Interconnect • Loudspeaker • Microphone • Mixer • Networking • Power • Software • Sound Reinforcement • System -
Wednesday, October 06, 2010Anatomy Of The Sound Reinforcement System For Historic Cameron Indoor Stadium
Keith Clark 10/06 02:41 PM, 0 CommentsWhen it opened in 1940 with a capacity of 7,000, Cameron Indoor Stadium was the largest indoor arena in the southern United States. Today, relatively unchanged after more than 65 years, it’s one of the smaller collegiate arenas in the nation, but a funny thing happened along the way: Cameron Indoor Stadium has deservedly earned legendary status as one of the truly great places to attend college basketball games. In fact, Sports Illustrated magazine ranks it number four on a… View this story
Filed in: AV • Feature • Slideshow • Amplifier • AV • Installation • Loudspeaker • Networking • Processor • Sound Reinforcement -
Monday, October 04, 2010Contracting Corner: The New Fire Code Could Equal Big Business
John Murray 10/04 01:00 PM,I’ll bet you’re wondering, “Why is there an article on the new fire code on this site?” Well, if you do any sound system installations in your business, the new fire code, 2010 NFPA 72 (National Fire Protection Association’s National Fire Alarm and Signaling Code), will have a huge impact on the fixed installation sound business. It may be the biggest thing to increase the bottom line since everyone decided they had to have an 8-box line array system instead… View this story
Filed in: AV • Feature • Poll • AV • Installation • Interconnect • Signal • Sound Reinforcement • System • Audio
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