Audio Magazine, Nov CIRCLE NO 41 ON READER SERVICE CARDĥ Stereo Review INCOHPORAIING HIGH FIDELITY Cover Among the hundred, 01 components in our annual Equipment Buying Guide, starting on page 71, are (clockwise from top right) the Marantz AV500 preamplifier. The information is then sent to a comparator circuit, which Velodyne The Bottom Line In Bass Velodyne Acoustics, Inc Commercial St., Suite 101 San Jose, CA W/ / * Graphs & quotes reproduced from "THUNDER IN THE LISTEVING ROOM hp D.B.Keele, Jr. ".If you want it all, the Velodyne is the subwoofer of choice." * Woofer This device is mounted directly to the speaker's voice coil, specificially to measure the acceleration of the speaker cone. Accelerometer Comparator Circuit Which is exactly what you bargained for.
".the Velodyne produced no distortion I could hear or see on the scope.this placed it in a class by itself" * Velodyne invented high-technology, low distortion subwoofers over ten years ago, receiving such critical acclaim from the audio press worldwide that it remains the standard by which others are judged. Unlike most "Servo" systems, which are based on voice coil impedance fluxuations and offer little improvement, Velodyne's system is based on a motion sensing device called an accelerometer. 'It is the cleanest loin frequency reproducer I've ever heard." * Velodyne solves the distortion problem with their patented "Motional Feedback - High Gain Servo" System. The Velodyne F-1500 reaches less than 2% distortion, even at the Lowest frequencies. The resultclear, powetful bass with virtually no distortion - is the sound of a Velodyne. The signal going to the woofer is then corrected (at 3500 times per second), to match the source signal. compares the differences between the pure signal from the source and the signal derived from the speaker's motion. And surprisingly, 25% THD is a typical accepted distortion specification for most of the subwoofers on the market today.
THD is caused when a speaker is unable to accurately reproduce the required musical signal, creating extra harmonics that don't belong in the music. 4 Most Subwoofers Give You 25% More Than You BargainM For! "Muddy" or "boomy" sounding bass is the by-product of TONAL HARMONIC DISTORTION (THD), the result of an increase in sound pressure level and a decrease in definition.
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