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Friday, May 20, 2011
Pat Brown 05/20/11 07:31 AM, 0 CommentsBecause the impedance of a loudspeaker is a frequency-dependent parameter, it must be measured at multiple frequencies to get a true picture of what the amplifier is “seeing” at its output terminals. While very sophisticated methods and instruments exist, you can get a pretty good idea about the impedance curve of a loudspeaker with a standard real-time analyzer. You will need a pink noise generator and voltage source of at least 10 volts RMS to drive the loudspeaker. A small… View this story
Filed in: AV • Feature • Study Hall • Amplifier • AV • Loudspeaker • Measurement • Power • Sound Reinforcement -
Wednesday, April 20, 2011
Keith Clark 04/20/11 12:14 PM, 0 CommentsIn the world of professional sound design and installation, there’s an old adage that goes “your system is only as good as the weakest component in the signal chain.” This is especially true of a sound system’s loudspeakers. They are the last link in the chain, directly responsible for communicating everything that’s been done to the signal along the way. The Basics One thing’s for sure: if a system sounds lousy, the listening audience will automatically shift their gaze first… View this story
Filed in: AV • Feature • Poll • Study Hall • AV • Audio • Digital • Line Array • Loudspeaker • Power • Signal • Sound Reinforcement • Subwoofer -
Tuesday, March 08, 2011
Jerrold Stevens 03/08/11 12:28 PM, 3 CommentsEver have one of your friendly amplifier reps walk in your office to present their new mondo-gazillion-watt beast and point out the damping factor spec of greater than a bazillion? Why, gee-whiz! That’s, like, 10 times more than the other guy! It must be awesome! Right? Well, as we have seen before, it depends on how you are going to use it. Let’s start with defining damping factor and see what it means to us. Amplifier damping factor is defined… View this story
Filed in: Live Sound • Feature • Poll • Study Hall • Amplifier • Interconnect • Loudspeaker -
Wednesday, February 02, 2011
Paul Mathews 02/02/11 03:12 PM, 0 CommentsThis article is provided by Rane Corporation. What could be more mundane than the transformers and autoformers that are the backbone of audio distribution systems? This article will show you that there is a lot more going on with these chunks of iron and copper than you ever suspected. Learn why transformers are often the power bottleneck in distribution systems, learn how to interpret datasheets, believe or disbelieve manufacturers’ claims, how to specify HV components, and how to set up… View this story
Filed in: AV • Feature • Poll • Amplifier • AV • Installation • Loudspeaker • Power • Signal • Sound Reinforcement -
Monday, January 03, 2011
Pat Brown 01/03/11 02:02 PM, 0 CommentsThe 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 • Analog • AV • Audio • Installation • Interconnect • Measurement • Signal • Sound Reinforcement • System -
Friday, December 24, 2010
Pat Brown 12/24/10 09:32 AM, 0 CommentsA common task in “audioland” is the need to feed a number of inputs from a single signal source. This may include driving a rack of amplifiers, providing feeds to the press, or distributing a signal around a building or campus. The methods used to accomplish this range from the profoundly simple to quite complex, and the appropriate method can only be determined after sizing up the situation. Impedance matching means that an output is terminated with a “mirror” input… View this story
Filed in: Live Sound • Feature • Study Hall • AV • Audio • Digital • Interconnect • Power • Signal • Sound Reinforcement • Studio -
Monday, October 18, 2010
Chuck McGregor 10/18/10 04:04 PM, 1 CommentThe main effect of damping in a loudspeaker is to reduce the SPL produced by the loudspeaker’s diaphragm moving because of its own inertia after the signal stops. The frequency of the sound it produces with this movement will be at the resonant frequency of the moving system. A common term for this is “overhang”. In severe cases this can translate into “one note bass”. Types Of Loudspeaker Damping There are two types of loudspeaker damping: mechanical and electrical. The… View this story
Filed in: Live Sound • Feature • Poll • Study Hall • Loudspeaker • Sound Reinforcement -
Tuesday, August 11, 2009
PSW Staff 08/11/09 08:53 AM, 0 CommentsBAE (Brent Averill Enterprises) has introduced the new, improved 1272 and 1272A stereo mic preamplifiers, featuring a new twist on vintage design, with the hand-built units now housed in enclosed chassis. “The benefit of this new design is that it provides more real estate on which to place additional features,” commented BAE President, Mark Loughman. “The four buttons on the faceplate signify 48-volt phantom power, phase reverse, direct line input and selectable mic input impedance of 1200 and 300 ohms.”… View this story
Filed in: Recording • Product • Analog • Audio • Digital Audio Workstations • Microphone • Processor • Studio -
Monday, July 20, 2009
Mike Wireless 07/20/09 12:35 PM, 0 CommentsSennheiser has long been one of the top wireless system manufacturers, respected for solid technology, high audio quality and a wide range of products, all evidenced by a long and varied user list. Earlier this year at the NAB (National Association of Broadcasters) show in Las Vegas, Sennheiser introduced the 2000 Series, its latest wireless system development. Pricing of the new 2000 Series is in line with the Shure UHF-R Series, and it now represents the “middle” of the Sennheiser… View this story
Filed in: Live Sound • Blog • Mike Wireless • Opinion • Product • Review • Audio • Concert • Installation • Microphone • Signal • Sound Reinforcement • Stage -
Thursday, July 16, 2009
PSW Staff 07/16/09 01:33 PM, 0 CommentsEngineered and built in the USA, the new CAD Equitek E100S large-diaphragm supercardioid condenser microphone has an exceptionally low noise floor (3.7 dBA) while providing a smooth vintage tone and full-bodied low end. The E100S features a bootstrapped, full differential Quadra-FET front-end to ensure high sensitivity and low distortion. A nickel-plated one-inch capsule delivers accurate phasing when miking instruments and a full, rich tone for vocals that is enhanced by the microphone’s extended low-end frequency response. CAD’s proprietary circuitry preserves… View this story
Filed in: Live Sound • Recording • Product • Microphone • Sound Reinforcement • Studio
Articles Tagged Impedance
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