We've adapted a few (sampler) articles from Audioxpress as
an example of the very high quality of this print magazine. Please visit Audioxpress for
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2004-03:
CONTENTS
FEATURES:
A 1 PPM IM DISTORTION ANALYZER--You can build this low-cost, unbelievably
high-sensitivity IMD instrument to measure small amounts of distortion. By
Richard Crawford
AN 8W 2E24 SE AMP--This author's parallel, single-ended amp design features
8W of power and a "clean, clear" sound. By Don Kang
AMPLIFIER MUSICALITY--This classic study from a respected audio authority
correlates measurements and musical performance. By Jean Hiraga
FRYKLEANER: AN AUDIO BURN-IN GENERATOR--An inside look behind the hardware
design of a complete self contained burn-in system. By Jim Hagerman
AGAINST THE WALL: AN UPGRADE--In this author's continual efforts to upgrade
his speaker system, he presents an improved version of his popular "thin
speaker" project published in Dec. '02. By John Mattern
WHY SPEAKERS HAVE SLANTED FRONTS, PT. 4--This audio veteran concludes his
extensive study with tips on positioning your tipped-front-panel enclosures
and how to build them. By G. R. Koonce.
REVIEWS:
VIRTOS NOISE WIZARD--Improve the quality of your recordings with this digital
editing software. Reviewed by Richard Honeycutt.
DEPARTMENTS:
OBITUARY -- PETER WALKER, 1916-2003, By Reg Williamson
BOOK REVIEW--Producing in the Home Studio with Pro Tools. Reviewed by
Bill Fitzmaurice
NEW CHIPS ON THE BLOCK-- Bicron Transformers and Burr-Brown DSS1700 DAC.
By Charles Hansen.
XPRESS MAIL--Readers speak out.
SHOWCASE--A Bulgarian Builds a Spencer Amp. By M. Nyssen.
2004:
Battery-Powered
Class A Headphone Amp (a DIY project) (Jul.)
Tube Audio Construction
Tips: Transformers (Jul.)
High-Quality Moving Magnet (MM) IC
Preamp
High Power SE 6C33C Amp – A vacuum-tube
DIY project
Optocouplers for Audio (Sept.)
Selectronic GRAND MOS Silver Design
Amplifier (review) (Sept.)
Loudspeaker Room Correction,
Part 2 (Sept.)
Saga of a Tube OTL Amplifier
Filament and High Voltage Power
for Vacuum Tube Electronics
High-Quality
Vacuum Tube (aka valve) Control Unit (Oct.)
Notes on Musicality and Distortion (Oct.)
Steps to Design and Build a Pair of
Speakers (Oct.)
Why Power Tubes (valves)
Arc (Nov.)
Single-Ended to Differential-Mode
Vacuum Tube Projects Made Easy
High-Voltage Differential Amplifier
for Measurement
ADCOM GFP-565 Preamp mod
Rebuild a Classic Heath’s W-5M
Sonic Comparison of Power
Amplifier Output vs. Input
InterSil
D2Audio Class D Audio Modules
2005:
Passive Preamp: Transformer Implemented
DIY Noise Meter Amp project
A Shock Hazard Tester (Feb.)
A Transconductance Tube Tester Test Standard
Loudspeaker: Driver Parameter Assessment
Using Transient Capture Analysis (Feb.)
Transformers (Feb.)
Build a DIY Music Library Preamp (Mar.)
Capacitor Bypassing
in Audio Power Supply Circuits: Proceed Carefully! (May)
POOGE for eBay/Craig's List Electronics
Test Gear (May)
A Snail Tail Subwoofer (DIY project)
Dynaco SCA 80 – update and rebuild (Aug.)
Five Speaker Myths Undone (Aug.)
A Full Bridge Tube
Output Amp
Loudspeaker Damping -- Theory
+ Application
Nardeux Stereomatic 602 S Vacuum-Tube Amplifier (Sept.)
DIY High-Quality Solid-State
Headphone Amp (Nov.)
Musical Waveform Peak and Average
Power Frequency Distributions (Nov.)
2006:
An IM Signal Generator
Upgrade (Feb)
Clamped Bias,
AB2, RC Coupled Vacuum-Tube Amp
Purist Recording Mixer--A
high-performance mike preamp/mixer/monitor (Feb.)
Selectronic ProFET amplifier
review
Dynaco 400 amplifier upgrade project (Feb)
Lowering a Loudspeaker’s
Mechanical Noise Floor
Stands for Tiny Speakers--a simple,
low-cost project (Apr.)
Switchable Gain Booster Amplifier (Apr.)
A Solid-State Single-Ended Power Amp (Apr.)
Mighty Mouse: A PP 25L6 Amplifier
Driver Interference and Display Techniques,
Pt. 1, Pt. 2 (Apr./May)
Renovating the H.H. Scott 222C vacuum
tube integrated amplifier (May)
Rehabilitating Cathode Followers (May)
6A87 Current-Balanced Push-Pull Amplifier
The ImPasse Preamplifier
Two-Transistor MC Phono Step-up (July)
2006 (Sept.):
Economical High-Quality Stepped
Attenuators – A DIY project (Oct.)
A Tube-based Balanced RIAA Amplifier
for Moving Magnet Cartridges – DIY project
One-Transistor MC Step-up (Nov)
A DIY Phase Meter Calibrator (Nov.)
Precise dB Monitoring with Eye Tubes
2007:
A $450 Triode/Ultralinear Integrated Stereo
Amplifier (Jan.)
DIY Combination Horn Loudspeaker Project
The Cathode Follower
and Its Weaker Siblings (Test results confirm that
cathode followers are even more capable of driving capacitive loads
than equivalent common-cathode amplifiers.)
A Unique Loudspeaker
Crossover Design with Waveform Fidelity
Build a
Wide-Range Audio Sweep Oscillator
Reliable Audio Engineering via Grounding
and System Interlacing
Review of Parasound’s Zamp
V3
How Loud Is Real? Why loudness controls
never worked
Six-Transistor Ultra Low-Noise MC Phono Preamp (April)
A Low-Noise Measurement
Preamp (Apr.)
De-Noising a Vanilla Pre-amp
Speech
Intelligibility: What reverb is -- and how to calculate it
Radio Shack Sound Level Meter Characteristics
An Analog A/B/I Switcher + Headphone
Amp
The GAMP: Adaptable Power for Tube Amps
Japanese IC Preamp with Electronic Level
and Selector
High-End 120W MOSFET IC Driven Amp
The Silent Information
Revolution -- Online education challenges traditional paradigms
Gamma: A 10-Watt Integrated
Amplifier
Tweaking the Passive Inverse RIAA Network (Aug.)
Calibration of the Hickok 539C tube
tester (Aug.)
Cascoding National’s LM12 for 140W (Aug.)
Optimum Stages for Minimal
Distortion (Aug.)
Ultra-Low Distortion Phono Preamp:
The LP-797 (Sept.)
A Loudness-Compensated Level Control
Stage (Oct.)
Monarchy Audio M24 DAC
The 6T9 Tube Amplifier
The Many Uses of a Hybrid Van Scoyoc Circuit
Sounds and Hearing (Oct./Nov.)
Intrinsic Fidelity Testing -- Limits
of conventional listening evaluations (Oct./Nov.)
A Hybrid Valve/MOSFET Single-Ended Amp,
Part 1 (Oct.)
A Single-Ended Class-A Hybrid Amp, Part
2 (Nov.)
A Mains Analyzer--How Clean Is Your Juice? (Nov./Dec.)
2008:
Advantages of Wall Wart Adaptors
Audio Tweaks, Mods vs. Science-based Evidence
A Hybrid (Tube/Solid-State) High-Fidelity
Power Amplifier (Jan.)
A Minimalist Audio
Amplifier Design
An
Inductively-Equalized Solid-State Phono Preamp
Soldering: A Brief Tutorial
The G40EP: A Flea-Powered Headphone
Amp (Mar)
The G40EP: A Flea-Powered
Headphone Amp (and how
to improve this classic design)
Copper Tubing Capacitor Connections (June)
Multiple “Wall-Wart” Power
Supply for Audio (June)
Single-Ended, Vacuum Tube, Class-A
Headphone Amp (a DIY project) (Jun.)
Upgrading a Belt-Drive
Turntable
Salvaging vintage audio
(electronics) treasures -- from dumpsters, eBay, etc.
Buying audio gear on the web: eBay, Craig's
List, Audigon, and beyond
Tips with audio projects using
vacuum tubes (valves) circuits: Choosing Cathode Bypass Capacitors (Aug.)
AC power methods:
A Beginner 6BQ5 SE Amplifier
Class-D amps (Nov.)
2009:
Benchmark DAC1 USB [review]
Tri-Way Low Voltage Supply
A Chip-Driven SE Monoblock Amplifier
Balanced Audio Cable Hum: Cause and Cure (May)
ezDAC -- A high-performance DIY digital-to-analog
processor (May)
The Unnecessarily Complex 300B Amplifier
Design and Measurement of a
Dipole Microphone (Jun.)
Improving a Flea-Powered
Headphone Amplifier (Jun.)
Pre-amplifier design tips (Jun.)
Maintaining Your Balance
-- A DIY project to handle balanced/unbalanced devices
A DIY true RMS audio AC Voltmeter
An experimental error-correction power
amplifier (Aug.)
Regulated Power Supply for
Tube Projects (Aug.)
PS Audio Digital
Link III -- Digital-to-Analog Converter
Review of the Pioneer
X-Z9 Compact Stereo System
21st-Century Cinema Design--Viewing
and listening requirements for a THX-quality theater design.
Review of Echo Busters
Decorative Acoustical Treatments
Phonograph Groove Jockey -- a unity-gain
signal-conditioning module (Oct.)
The Noise (Analysis)
Machine -- a method to perform accurate noise measurements
Distortion Meter
– An Audio Interconnect Tester?
Interview with the late Professor
Malcolm Hawksford
Chassis construction techniques
for audio projects
2011
"Vanishing" Loudspeakers
– a DIY project for stereo and THX surround use (Mar.)
The Basics of Headphone
Testing and Measurements
Ultra Low-Noise
Phono Preamp [theory, concept, design and DIY project]
DIY DAP—A Do-It-Yourself
Digital Audio Player: Build an embedded hardware/software
system for 16-bit digital audio.
The Willowhill Pre-amp --
A high slew-rate JFET pre-amplifier
Rebuild an Old Turntable --
A simple circuit and some tinkering allow clean analog sound.
All About Speaker
Cones -- Let's examine loudspeaker materials, fabrication,
and quality
Below content adapted from Edward T. Dell, Jr.'s original Audio Electronics
/ Audio
Amateur magazine ...
2002-02:
ARTICLES:
Hybrid Tube/MOSFET SE Amp
The Hearing Assistant
A Case Study in Audio Amp Design: Part 4
DEPARTMENTS:
EDITORIAL -- By Edward T. Dell, Jr.
GUEST EDITORIAL -- By Gary Galo
PRODUCT REVIEW -- HHB Compact Disc Recorder
KIT REVIEWS:
PHONES-01 Headphone Amplifier
Marchand PR41 Passive Preamplifier
AUDIO AID
Resins for Loads -- By Mark L. Sanfilipo
JUST LOOKING
LETTERS
2000-03
ARTICLES
Audio Power Meter
On The Mechanics of Tonearms, Part 1
The Power Follower 99
A Case Study in Audio Amp Design: Part
5
DEPARTMENTS
PRODUCT REVIEWS
NAD PP-1 Phono Preamplifier
A DSO Trio, Part 1
Audio SIP-1
BOOK REVIEW--Elektor 300 Circuits
AUDIO AID
What's a VU?
JUST LOOKING
LETTERS
IN EVERY ISSUE
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