• FEATURES
  • BUILD A PLASMA TWEETER (4)
    Here's a hot idea - ion tweeters you can build to reproduce high-frequency sound that's clean, clear, and totally non-directional.
  • CAPACITOR ESR TESTER - THE GOOD, THE BAD, AND THE LEAKY... (14)
    Build this handy test unit to measure and track down faulty capacitors.
  • A HYBRID STEREO $90 CONTROL (22)
    With its low cost and simple circuit architecture, this high-quality control unit is one you can easily add to your audio system.
  • A 6AS7/6080 CIRCLOTRON AMP (32)
    Check out this affordable, relatively easy to assemble project that's a good introduction to circlotron amp design.
  • MAKE A PANEL-CUTTING JIG (38)
    Can your table saw cut it? Discover how this jig can make your next speaker-building project a breeze.
  • REVIEWS
  • BUDGET PHONO PREAMPS (40)
    Here's a survey of some low-cost phono preamps. Find out which one is right for you.
  • LISTENING CRITIQUE (52)
  • TESTING THE SEAS FROY MK3 (57)
    How does this updated Froy kit, featuring high-quality SEAS drivers rate? Our audio experts put this design through its paces.
  • LISTENING CRITIQUE (58)
  • DEPARTMENTS
  • XPRESS MAIL (62)
    Readers speak out.
  • BOOK REVIEW (67)
    Master Handbook of Acoustics.
  • AUDIO AID (69)
    A 1cent Diffraction Detector.
    Current-Regulated Heater Supplies.
  • IN EVERY ISSUE
  • CLASSFIEDS (70)
    Audio-related items for sale or wanted.
  • AD INDEX (70)
  • YARD SALE (71)
    Free classifieds for subscribers.