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There were 10 articles found in this category:

  1. questionRecommendations - Cables, Power Line Conditioner, or Other Equipment
    Various accessories such as power cords, interconnects, power conditioners, and even more so major components such as speakers, as well as analog or digital front ends, often have a significant effect on the sound of a music reproduction system. Unfortunately, the sonic effect of such products i ...
  2. questionAnswers to common questions about audio transformers
    Bill Whitlock Jensen Transformers What does "balanced" really mean? The purpose of a balanced line is to transfer a "signal" from one place to another while rejecting "ground noise", which is not white noise or hiss, but power line related hum and buzz. To accomplish this noise rejection, two si ...
  3. questionWhat do class D amplifiers excel at?
    Some of the most sophisticated class D amplifier designs today can rival in sonic refinement and sensuous musicality the most prestigious power amplifiers on the market, regardless of price. Class D amplifiers are true green energy champions because of their incredible power conversion efficien ...
  4. questionWhy Jeff Rowland has so dramatically changed course, and has adopted switching technology for power supplies and power amplification?
    In 1992, by challenging the limits of the possible in audio engineering through advanced topologies and revolutionary rechargeable battery twin power supplies, Jeff imparted his Model 9 monoblock power amplifier flagship its gorgeous musical footprint: a tremendous staging and dynamic power, mat ...
  5. questionBuild a "hummer" to help find "pin 1" ground problems
    Based on a paper by John Windt in the Journal of Audio Engineering Society, June 1995. Complete article attached below.
  6. questionSubtleties in high end audio
    Bill Whitlock, Jensen Transformers Subtleties count in wide-dynamic-range analog interfaces Transporting high-dynamic-range analog signals from one piece of equipment to another is not a trivial task. Even subtle design variations can make huge differences in the equipment's ability to reject in ...
  7. questionHum and buzz in unbalanced systems
    Bill Whitlock Jensen Transformers Often sound systems exhibit strange and perplexing behavior such as hum that appears and disappears when power to other equipment, not even part of the audio system, is switched on or off! Traditional methods to eliminate hum often seem more like voo-doo than en ...
  8. questionLine-level transformers in high-end audio
    Mark J Medrud Design Engineer Jeff Rowland Design Group, Inc. To some, transformers epitomize the early obstacles to high fidelity: Abruptly limited bandwidth short changed both the ends of the frequency spectrum and smeared transients. Limited power bandwidth in particular hampered output t ...
  9. questionDigital Volume Control: DACs versus the Crystal Semiconductor CS3310
    Mark J Medrud, Design Engineer Jeff Rowland Design Group, Inc. 15 March 1995 Though commonly available and commonly used, four-quadrant multiplying DACs (Digital to Analog Converters) have a number of inherent problems when used as digitally controlled volume controls. The CS3310 volume contr ...
  10. questionAssessment of the Importance of Audio Measurements in High-End Design
    Assessment of the Importance of Audio Measurements in High-End Design Jeff Rowland, President and Chief Designer, Jeff Rowland Design Group (Excerpted from Ultimate Audio magazine, Spring 1999 pp.16-17, "Friend or Foe? High End Designers Reassess the Importance of Audio Measurements" by Myles ...