-
Wednesday, March 02, 2011
PSW Staff 03/02/11 02:34 PM,Electric power companies have a good idea that has been applied to audio engineering. When they run power through miles of cable, they minimize resistive power loss by running the power as high voltage and low current. To do this, they use a step-up transformer at the power station and a step-down transformer at each customer’s location. This reduces power loss due to the I2R heating of the power cables. The same solution can be applied to audio communications in… View this story
Filed in: AV • Feature • Poll • Amplifier • AV • Installation • Interconnect • Loudspeaker • Power • System -
Monday, February 28, 2011
Pat Brown 02/28/11 11:03 AM, 1 CommentHere’s a handy quiz for checking your knowledge about audio power. Rather than submit you to the typical “right or wrong” questions with exact numerical answers, I’ve elected to provide a different means of self-evaluation. I can tell you up front that the answer to every question is “It depends!” But what’s really being asked is “WHAT does it depend on?” At first glance it may seem that the question is not even related to audio. Don’t be fooled. Principles… View this story
Filed in: AV • Feature • Poll • Study Hall • AV • Loudspeaker • Power • Sound Reinforcement • Audio -
Friday, February 25, 2011
PSW Staff 02/25/11 07:55 AM, 0 CommentsCrown Audio will be offering an online seminar, “Installation Applications for the PIP-USP4 Processing Module,” on March 24 at 10:00 a.m. and 4:00 p.m. Eastern Standard Time, and on March 25 at 1:00 p.m. Eastern Standard Time. The seminar, presented by Crown’s Director of Application Engineering, Bradford Benn, will cover the features and applications of the PIP-USP4. The Crown PIP-USP4 is a fourth generation DSP PIP (Programmable Input Processor) input module for CTs Series two channel amplifiers. The USP4 connects… View this story
Filed in: AV • Live Sound • News • Poll • Amplifier • AV • Digital • Education • Ethernet • Installation • Interconnect • Networking • Signal • Sound Reinforcement • System • Audio -
Monday, February 21, 2011
Bruce Bartlett 02/21/11 08:37 AM,Determining which power amplifier is appropriate for a specific application is not as easy as one may think. To fully understand what needs to be considered, three specific case studies will be outlined: • A client wants to play folk music in a coffee shop. How much amplifier power do they need? • 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 PA loudspeakers.… View this story
13 Comments
Filed in: Live Sound • Feature • Poll • Study Hall • Amplifier • Digital • Interconnect • Loudspeaker • Power • Signal • Sound Reinforcement • System • Audio -
Tuesday, February 15, 2011
Bruce Bartlett 02/15/11 12:48 PM,It’s an answer to a sound company’s prayers: low-weight, cool-running power amplifiers with low current draw. Look for switching power supplies in power amps, and switch-mode power amplifiers. Compared to a standard amplifier power supply, the benefits of a switch-mode (switching) supply are lower size and weight. Compared to a standard analog power amplifier, a switching amp tends to run cooler and draw less current because it is so efficient. In addition, the amp can be smaller and lighter because… View this story
Filed in: AV • Feature • Poll • Study Hall • Amplifier • Installation • Power • Signal • Sound Reinforcement -
Monday, December 13, 2010
Pat Brown 12/13/10 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 -
Thursday, December 09, 2010
PSW Staff 12/09/10 02:29 PM, 0 CommentsCrown Audio will be offering an online seminar, “Creating Custom Panels In HiQnet System Architect” on December 16 at 11 am and 3 pm Eastern Standard Time, and on December 17 at 1 pm Eastern Standard Time. The seminar, presented by Crown director of application engineering Bradford Benn, will cover a case study of creating a control system for a small arena audio installation, using Harman HiQnet System Architect software. The concepts taught during the seminar apply to any size… View this story
Filed in: AV • Live Sound • Church Sound • News • Poll • AV • Digital • Education • Installation • Networking • Software • Audio -
Tuesday, November 30, 2010
Pat Brown 11/30/10 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, October 27, 2010
PSW Staff 10/27/10 12:43 PM, 0 CommentsThis calculation will give you the amount of attenuation, in decibels, you can expect with a change in receiver distance, in a free field (outdoors). For example if you were standing 20 feet from a loudspeaker, and were to move to 40 feet away from that loudspeaker, you would expect to see a drop in level of 6 dB. Sound that is radiated from a point source drops in level at 6 dB per doubling of distance. Equation used to… View this story
Filed in: Live Sound • Feature • Study Hall • Amplifier • Engineer • Installation • Interconnect • Line Array • Loudspeaker • Power • Signal • Sound Reinforcement • System • Audio -
Friday, October 15, 2010
Steve Lyle 10/15/10 04:44 PM,A power amplifier is a device for making a larger, more powerful signal out of a small, weak signal. It was on February 18, 1908 that Lee DeForest was granted U.S. Patent No. 879,532 titled “space telegraphy,” but in actuality, the patent was for a vacuum tube triode amplifier that DeForest called the “audion amplifier.” For the first time it was possible to amplify signals. The first amps were developed to support radio. Later, other applications were developed. All electronics… View this story
Filed in: Church Sound • Feature • Poll • Amplifier • Analog • Digital • Power • Sound Reinforcement
Articles Tagged Amplifier World
Product Showcase
Advertising
Learn more about product showcase listings
Sponsored Links
- Review the latest products in the industry at the ProSoundWeb Product Showcase - PSW Product Showcase