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Wednesday, February 20, 2013
Jeff Kuells 02/20/13 06:33 PM,For years, power amplifiers with multiple channels (generally defined as more than two) were for either multiple headphones in studios or low-power-per-channel commercial applications. But are multichannel amps viable for mainstream professional sound reinforcement? You bet. Times have changed, and once again with regard to equipment, the change is for the better. Units with 3 to 6 channels have actually been around since the early 1980s. However, these either had a rather low power-per-channel rating or were fraught with design… View this story
Filed in: AV • Feature • Blog • Product • Amplifier • AV • Power • Sound Reinforcement -
Tuesday, October 16, 2012
Pat Brown 10/16/12 05:26 PM,How much power can an audio amplifier produce? As you might expect, “it depends.” I will approach this from two angles - in theory and in practice. This article will deal with the theory. Part 3 will show how things play out in the real world. Importance Of Efficiency Amplifiers don’t make power. They convert it. Any audio power that comes from your amplifier must in turn come from the utility outlet that it is connected to. This is why… View this story
Filed in: AV • Feature • Blog • Product • Study Hall • Amplifier • AV • Power • Sound Reinforcement -
Monday, February 20, 2012
Bruce Bartlett 02/20/12 02:18 PM,Following is a list of some common sound problems and several ways to solve them. At least a few of these might seem obvious, but we’ve all made simple mistakes like not flipping a switch. If the advice given here doesn’t work, determine which device is at fault, then obtain help from tech support at the manufacturer or contact a qualified audio professional. No Sound—Be sure everything is plugged into AC power and turned on. (Sorry – had to mention… View this story
Filed in: Church Sound • Feature • Poll • Study Hall • Education • Sound Reinforcement • System -
Thursday, February 16, 2012
Bob Thurmond 02/16/12 10:11 AM,How many sound systems 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 start by trying to… View this story
Filed in: Live Sound • Feature • Poll • Study Hall • Analog • AV • Digital • Education • Sound Reinforcement • System • Audio -
Tuesday, December 06, 2011
Karl Winkler 12/06/11 12:42 PM,Some time ago I was on a trip to Japan, visiting some key customers, and I picked up on something that has been brewing in the back of my mind ever since. Maybe the light bulb went on because I was in a different country with a different culture, but here was the thing… I was asked several times by several people: “what’s the maximum number of channels your wireless system can operate simultaneously?” That’s when the “something” in the… View this story
Filed in: Live Sound • Feature • Poll • Amplifier • AV • Consoles • Digital • Education • Installation • Interconnect • Loudspeaker • Measurement • Signal • Sound Reinforcement • Technician • Audio -
Wednesday, July 20, 2011
Bruce Bartlett 07/20/11 09:11 AM, 0 CommentsAs audio professionals, the more we understand what’s under the hood of modern power amplifiers, the better we can make a wise buying decision. What are the main sections or parts of a power amp? Every power amplifier includes a power supply, an input stage, and an output stage. Most amps also have protection mechanisms; some have DSP, and a few have networking capability. Let’s explain each feature… Power Supply Basically, a power amplifier uses the input signal to modulate… View this story
Filed in: AV • Feature • Poll • Slideshow • Study Hall • Training • Amplifier • Analog • AV • Digital • Power • Sound Reinforcement -
Thursday, July 14, 2011
Bruce Bartlett 07/14/11 02:24 PM,A client wants to play folk music in a coffee shop. How much amplifier power is needed? A rock group will be playing in a 2,000-seat concert hall. How many watts will you need to provide? A jazz-fusion group bought some loudspeakers, and want to play them as loud as they can get without blowing them up. Which amplifier should you recommend? Questions such as these arise in any sound system design. To help you specify an optimum amount of… View this story
Filed in: AV • Feature • Poll • Study Hall • Amplifier • AV • Loudspeaker • Power • Sound Reinforcement • Audio -
Wednesday, July 06, 2011
PSW Staff 07/06/11 08:24 AM,This calculator provides the required electrical power (power output from the amplifier) to produce a desired Sound Pressure Level (SPL) at a given distance, along with an amount of headroom to keep the amplifier(s) out of clip. Example: You are designing a system where the farthest listening position from the loudspeaker is 100 meters, and the desired Sound Pressure Level is 85 dB SPL. The loudspeaker chosen for the job has a sensitivity rating of 95 dB. With the minimum… View this story
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Filed in: AV • Live Sound • Feature • Amplifier • AV • Education • Installation • Interconnect • Line Array • Signal • Sound Reinforcement • System • Audio -
Wednesday, June 29, 2011
Jeff Kuells 06/29/11 01:24 PM, 0 CommentsI felt the need to write this article after a recent cross-country trip, and I’m pretty sure many of you can relate to my experience. At a newer, modern airport, I was waiting to board a connecting flight, and everything appeared to be going as planned until the departure time suddenly changed on the monitor - a one hour delay. However, I never learned the reason for the delay, because the gate attendant making the announcement either had the mic… View this story
Filed in: AV • Feature • Poll • Study Hall • Amplifier • AV • Installation • Loudspeaker • Power • Sound Reinforcement -
PSW Staff 06/29/11 01:06 PM, 0 CommentsThis calculation will give you the ratio, in decibels, between two power values. For example, you can calculate the difference in dB between to amplifiers with different power output specifications. Enter any two values and press “Calculate” for the remaining value. Press “Reset” before performing each calculation. Equation used to calculate the data: dB = 10 * Log(Pout / Pin) View this story
Filed in: Live Sound • Feature • Poll • Study Hall • Amplifier • Installation • Interconnect • Loudspeaker • Power • Signal • Sound Reinforcement • System • Audio
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