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Multiple Subwoofers: Benefits & Setup

Multiple Subwoofers: Benefits & Setup

Q&A with Todd Welti (Principal Engineer in Acoustics, Harman Corporate Technology Group) & Kevin Voecks (Manager of Product Development, Harman Luxury Audio Group)

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Laser Light Sources in Digital Projectors

Laser Light Sources in Digital ProjectorsThe first projectors utilized incandescent lamps as their light source. Despite advances in every other area of display technology, this fact is basically unchanged. Today’s digital units still rely on a hot-running ultra-high pressure lamp to create an image. In addition to their short lifespan and high cost, they dim and shift color as they age. There has to be a better way! A few years ago, LEDs were put forth as an alternative light source. They’re still available in a few expensive models. At this year’s CEDIA Expo, Epson introduced two laser projectors, the LS10000 and LS9600e. They’re not the first of their kind but they are the first to sell for less than $10,000. We hope this breakthrough will encourage other manufacturers to follow suit in embracing this exciting new tech.

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AVR - Audio Video Receiver - Build Quality: Part II - Design of High-Performance AVRs and Pre/Pros

Audio Video Receiver - Build Quality: Part II

Following on my technical article"AVR - Audio Video Receiver - Build Quality: Part I", here, in Part II, I dig a bit deeper into the performance of a single-chip Large Scale Integrated (LSI) analog AVR chip and introduce better solutions employing Small Scale Integrated (SSI) analog chips. Herein, I refer only to Pre/Pros, but everything discussed applies equally to AVRs. Pre/Pros tend to use analog SSI chips, while most AVRs use the LSI solution (see the chart in Part I of this article for the make and model numbers of the AVRs and Pre/Pros using the LSI chip). I carryover the term, AVR LSI, from the first part of this article and refer to AVR when I comment on products with power amplifiers.

 

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The Fully Balanced Power Amplifier - Advantages and Design Challenges

The Fully Balanced Power Amplifier - Advantages and Design Challenges

The ATI 6002 and Emotiva XPA-1 represent a major advance in amplifier designers. To my knowledge these are the first, high power, full balanced amplifiers with feedback from the input to the speaker terminal in high volume production. These amplifiers have significantly better performance when compared...

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Dirac Research Room Correction Technology

Dirac Research Room Correction Technology

Digital audio room correction is nothing new of course yet researchers from Uppsala University in Sweden have developed their own. Dirac Research was founded in 2001 and has not only applied their technology in the automotive...

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Media Servers – Where Are We Now, Where Are We Going?

Media Servers – Where Are We Now, Where Are We Going?

The term media server often conjures images of expensive and difficult-to-use products. In reality, the opposite is true. Today we’ll talk about a few choice products, what the difference between a streamer and a server is, and how you can build your own solution from off-the-shelf parts.

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AVR - Audio Video Receiver - Build Quality: Part I

AVR - Audio Video Receiver - Build Quality: Part 1What does your money purchase inside the chassis of an AVR or Pre-Pro in an audio / video system?  In this article, one in a three-part series, I attempt to answer this question: I will open the top and look at the parts inside and show how each of the individual parts can affect the audio quality.

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The Inner World of LCD TVs - Part II

The Inner World of LCD TVs, Part 2

As you probably know well by now, LCD TVs are far and away the most popular type of flat-panel television available today. But exactly how they work is a mystery to most, even technically inclined folks within the industry. So I decided to provide a clear and comprehensive explanation of the inner workings of LCD TVs—no easy task...

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Bjorn's Music Matters Seminars

Bjorn's Music Matters Seminars

Bjorn's is a major A/V Retailer and Custom Installation shop in San Antonio, Texas. The store was founded in 1975 by Bjorn Dybdahl. He started out in a modest 1,000 square foot lease space under the banner...

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AVR – Audio Video Receiver – Build Quality: Part III – Component Choices for a High Performance Design

AVR-Audio Video Receiver-Build Quality: Part III

In Part III of this article series, I discuss jitter, digital filtering, and Large Scale Integrated Circuits (LSI) in relation to AVRs.

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Daedalus Speaker Upgrade

Daedalus Speaker Upgrade

I've been enjoying my Daedalus 2.1 speakers in my stereo setup ever since I reviewed and bought them in 2008.

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