Audio Amateur 2/1977 PDF
Audio Amateur 2/1977 PDF - Issue is in black & white
Scan of printed copy, PDF download immediately upon purchase
The second issue of 1977 for The Audio Amateur continues to push the boundaries of high-fidelity DIY with advanced driver designs and definitive distortion studies. Here are the highlights of this issue:
- A High Efficiency Electrostatic Loudspeaker System: Part 1: Build a world-class speaker array from scratch. David Hermeyer shares his precision-engineered design for a high-efficiency system capable of producing 110dB peaks and a wide 40-degree dispersion, offering transparency that rivals the best commercial units.
- Transient Response: A Do-It-Yourself Clinic: Is your system muffling the "fleeting transients" of your favorite music? Learn how to use a simple test record and an oscilloscope to identify and eliminate bottlenecks in your signal chain, from the cartridge to the amplifier.
- An Amateur's Version of the Heil Air Motion Transformer: Step into the future of driver technology. Neil Davis provides a complete guide to building a DIY version of the revolutionary Heil driver, offering extraordinary clarity and low distortion for high-frequency reproduction.
- Slewing Induced Distortion: Part 2a & 2b: Walt Jung continues his landmark series on SID. This technical powerhouse explores Total Harmonic Distortion and two-tone intermodulation tests, providing the data you need to select the highest-performance IC op amps for your next project.
- Kit Report: The Dynaco Stereo 400: Get the expert verdict on one of the era’s most powerful kits. Walt Jung provides a detailed 12-hour construction log and rigorous bench tests to see if this 200W-per-channel heavyweight lives up to the "super amp" hype.
- Super Power Amplifiers: An Aural Comparison: Which "super amp" reigns supreme? This issue features a subjective listening comparison between the GAS Ampzilla, Heath AA-1640, and the Dynaco Double 400, helping you decide which high-power solution belongs in your system.
- Audio Aids: This issue is packed with clever reader-submitted hacks, including a "Super Crossover" design and an ingenious "Penurious Panning" circuit for custom four-channel mixing.
- Book Talk: Stay informed with expert reviews of the latest technical literature. R.H. Miller evaluates essential circuit compendia containing thousands of tested designs to fuel your DIY curiosity.
- Editorial: Zen and the Art of Audio Maintenance: The Editor reflects on the "objective/subjective dilemma" and explores how our relationship with machines defines the quality of our listening experience.
Table of Contents
- Editorial ............................................................................................................................................ 3
- A High Efficiency Electrostatic Loudspeaker System: Part 1: by David P. Hermeyer ........... 4
- Transient Response: A Do-It-Yourself Clinic: by H. L. Eisenson .............................................. 12
- An Amateur's Version of the Heil Air Motion Transformer: by Neil Davis ............................. 15
- Slewing Induced Distortion: Part 2a: by Walt Jung ................................................................... 22
- Slewing Induced Distortion: Part 2b: by Walt Jung ................................................................... 37
- Audio Aids: by readers Lovett and Bostic ....................................................................................... 42
- Kit Report: The Dynaco Stereo 400: by Walt Jung .................................................................... 48
- Super Power Amplifiers: An Aural Comparison: by Walt Jung ................................................ 62
- Book Talk: by R. H. Miller ................................................................................................................ 64
- LETTERS .......................................................................................................................................... 69
- JUST LOOKING .............................................................................................................................. 57
- CLASSIFIED ..................................................................................................................................... 74
- ADVERTISING INDEX ................................................................................................................... 73