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DVI and HDMI Cable Quandry
Cable Quandary: Composite, S-Video, Component Video, DVI, and HDMI Connectors At Axiom we take a rational, scientific and no-nonsense approach to cables in general, speaker cables in particular. If it's good-quality copper and it's thick enough for a given length (we like 12-gauge for speaker cable runs longer than 15 feet), then the cable's resistance is low enough to prevent any audible or sonic degradation.
By Alan Lofft
National Research Council - AxiomAudio
The National Research Council (NRC) is the home of ground-breaking psycho-acoustical research that has become the standard by which leading loudspeaker manufacturers measure sound reproduction. Read on to see how Axiom, one of the founding companies of this research, uses these principles connecting the relationship between technical measurements and listeners' impressions in double-blind listening tests.
By Alan Lofft
Dolby Pro Logic II
Dolby Labs' Stunning New Circuit Extracts a Goldmine of Hidden Spatial Cues from Stereo CDs, LPs, and old Surround Movies Those of you who've spent hard-earned dollars in the last couple of years on a killer new Dolby Digital/DTS A/V Receiver may think you have it all—discrete Dolby Digital 5.
By Alan Lofft
How A Digital Amplifier Works
Most audiophiles and enthusiasts have grown up with at least a basic understanding of what an amplifier does. It takes a tiny alternating electrical signal that represents the moment-to-moment variations of musical frequencies and their amplitudes (volume levels), and increases their strength many times so they're powerful enough to drive the cones and domes of speakers back and forth to generate air pressure variations (waves), which replicate the original sound waves.
By Alan Lofft
Ten Things You Always Wanted to Know About Amplifiers - Axiom Audio
1. Is Amplifier Weight an Indicator of Robust Amplifier Design? You have to find out if the amplifier is a Class A/B analog amp or a Class D digital amplifier before you can generalize about weight and amplifier quality.
By Alan Lofft
Understanding the "0 dB" Setting on Your AV Receiver Volume Control Display
It’s only in the last decade that the concept of “0 dB” as it relates to AV receiver volume controls and playback loudness has become common on AV receivers and AV preamps. Previously, if a volume control had numerical values marked on the receiver’s front panel or shown in a front-panel display, the numbers got bigger as you increased playback volume; when you reduced the volume, the numbers got smaller.
By Alan Lofft
Understanding the decibel - what is dB?
The Decibel (dB) and the Violin/Piano Recital One of the most difficult-to-understand terms for newcomers (and even experienced enthusiasts) in audio and sound reproduction is the decibel, partly because it’s a measure of relative intensity or power in both acoustics and electrical circuits.
By Alan Lofft
Understanding Speaker Impedance
Easy Answers to Confusing Specs: Sorting Out "Impedance" You've seen references to "impedance" and "ohms" in various loudspeaker specifications or in your owner's manual for an AV receiver. But what is it? Do you have to "match" speaker impedance to your AV receiver or amplifier? Let's first get a couple of things clear: Impedance has nothing—I repeat, nothing—to do with sound quality.
By Alan Lofft
Tight or Flabby Bass?
Regular readers of loudspeaker and subwoofer reviews both online and in hi-fi/video magazines are used to seeing references to the sound quality of deep bass reproduction. Adjectives such as “tight” and “flabby” or “loose” are tossed around by reviewers in quite casual fashion, as if it’s a given that subwoofers or large loudspeakers have inherent traits of “tightness” or “flabbiness” based on their design.
By Alan Lofft
Treated vs Untreated: A Comparison of Two Identical Listening Rooms
At the Home Entertainment Show 2007, held in May in New York City’s Grand Hyatt Hotel, and sponsored by Stereophile and Home Theater magazines, one of the more interesting demonstrations let show attendees and the press hear and compare the combined effects of special room treatment and digital parametric equalization in one hotel room while across the hall was a virtually identical room with no treatments applied.
By Alan Lofft
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