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HDMI has changed versions so many times it's been hard to keep up for most people. We've talked about the versions as part of other articles and documents, but it seemed fitting that we'd formulate…
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We are always preaching the more subs the better in a home theater system. So now that you've decided to purchase two subs, its time to show you how to correctly connect them up to ensure you…
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Recently Reviewed
Ever wonder why some higher end manufacturers utilize top notch parts in their crossovers? This article explores the differences between capacitor and inductor types utilized in the crossovers of your loudspeakers and how the use of a non-linear materials can affect the sound of the music we hear. If we are looking to improve our systems, and purchasing upgrade crossovers, we need not only be informed about the specifications of the parts used in them, we also need to consider the PCB layout as well. While perhaps the simplest electrical circuits in use in audio today, crossovers can play a major role in the sound we hear coming from our speakers, and our speakers are the most important link in the audio chain in the vast majority of systems in use today.
HDMI 1.4 and Through the Ages
Clint DeBoer
— last modified September 03, 2009 07:10
Key Digital had an interesting newsletter that got sent out this week. In it they had a table which went through the various iterations of HDMI, from version 1.0 through the newest 1.4. We thought it was a good chart, though we disagreed (slightly) with some of their assessments on the importance of each of the versions. As I hinted at in my article on The Twelve Biggest Industry Mistakes of the Digital Age I believe that HDMI is really more of a stop-gap interface whereas it could have been a new standard. Instead, we have a largely "stupid" new cable system that merely carries data. HDMI 1.4 does little to change this reality.
The ongoing convergence of AV and computing is inevitable, rooted in the dawn of digital media with the advent of the CD, and nurtured by the Internet. Media servers, multimedia gaming consoles, HTPC, networked AV receivers, mp3 player docks, IPTV; digital entertainment is becoming as at home on computers as it is on traditional AV gear. However, all of this crosspollination between the two often leaves entertainment stored in disparate locations so a reliable connection is required to transfer the entertainment files between devices.
For those who find the shortcomings of Wi-Fi make it less than an ideal solution, there are other methods available that are not as onerous as pulling Ethernet cable through walls and attics by making use of existing home wiring systems. These methods also provide connections that are more secure with better data throughput and reliability. There is a reason that mission critical business systems and servers are primarily hardwired and not connected by Wi-Fi.
Going to 7.1-Channel Surround Sound
Alan Lofft
— last modified July 03, 2009 23:03
Almost everyone loves surround sound, (except for an eccentric actor whom I know who actually prefers mono!) and what’s not to love? Our ears are on each side of our head, canted forward, but we hear sounds from every direction with almost equal precision. For that reason multi-channel sound reproduction is intrinsically more realistic and believable. But how many surround speakers are required to present a plausible illusion of the real thing?
Room modes cause standing waves that can cause three acoustical problems: a level boost at some frequencies, an extent of the duration of sound at those same frequencies (resonance) and some profound dips at other frequencies. This article explores methods of reducing the problems of standing waves in your home theater room and also works real world examples for greater clarity. Don’t settle for acoustical compromises. Learn the facts, and arm yourself with the right tools to enhance your movie watching and music listening experiences.
Audyssey DSX 10.2 Surround Sound Overview
Paul Apollonio
— last modified July 30, 2009 13:27
Audyssey as a company is sort of a brain trust that creates and licenses signal processing solutions. They employ the sciences of psychoacoustics, acoustics, signal processing and use highly complex mathematical algorithms to put those Mega Flop DSP chips to work to do dynamic equalization and derive extra channels for surround sound.
The Crossover - Brain of your Loudspeaker System
Paul Apollonio
— last modified October 26, 2009 14:24
Have you ever wondered how the tweeter and woofer have their responses combined in a speaker system, or what the crossover network is and how it works? This article sheds some light on the least seen and perhaps most undervalued part of the speaker system, the crossover network. While passive crossover components and materials and construction have changed over time, the underlying theory and practice has not. In the real world, capacitors, inductors and resistors exhibit behavior which is neither ideal or perfect. In this article, we considered the importance of real loudspeaker impedance, and how it acts as a monkey wrench to complicate and frustrate the function of constant resistance type crossover networks.
Bass Trapping Ideas for Non-Ideal Spaces
Jeff Hedback
— last modified May 27, 2009 12:23
Bass traps control low frequency issues in rooms. Simply, they are the single most effective investment toward a quality audio experience that is rarely made by the home theater enthusiast. The information contained within this article may not allow you to unleash your own plan for optimal bass trapping, but it may point you towards that result. Proper bass trapping is a 100% guaranteed investment and is worth a close look for those serious about achieving the best bass response their home theater systems have to offer.
How a Class D "Digital" Amplifier Works
Alan Lofft
— last modified May 08, 2009 00:56
Ever wonder how an amplifier works at a very fundamental level? Alan Lofft, Resident Expert of Axiom Audio takes us on a tour of traditional linear amplifiers as well as the newer more sleek Class D designs. Various types of Class D design approaches are discussed including feedback topologies and their implications on audio performance and efficiency. The similarities and differences of traditional Class D amplifiers compared to Axioms new A1400-8 multi channel amplifier is reviewed. Learn what makes these amplifiers tick and why it’s cool in more ways than one to get your hands on the future of high end audio amplification that is powerful, efficient, and lightweight compared to their analog predecessors.
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