audioXpress Supplementary Material

Supplemental Material (previously available on CD): Loudspeaker Design Cookbook
Issue Article Author File(s)
02/21 X-Altra Moving Coil/Moving Magnet RIAA EQ Preamplifier  Andrew C. Russell Russell-AX-Feb2021
01/21 Getting Started with Automotive Audio Bus Brewster LaMacchia LaMacchia-AX-Jan2021
01/21 Live-Edge Dipoles Perry Marshall Marshall-AX-Jan2021
01/21 Four Digital Stylus Force Gauges Gary Galo Galo-AX-Jan2021
12/20 Article Update: Comparing IMD (and THD) Measurements Burkhard Vogel Vogel-AX-Dec2020
09/20 Loudspeaker Measurements at Home: A Guide for Building Your Own Test Chamber Geoff Hill Hill-AX-July2020
07/20 Build a Fully Balanced Transconductance Preamplifier Dimitri Danyuk Danyuk-AX-June2020
05/20 Build This MoFo! Mike Rothacher Rothacher-AX-May2020
05/20 Stop Worrying About Coupling Capacitors! Ethan Winer Winer-AX-May2020
06/19 Searching for a Unicorn Brian Lowe Lowe-AX-June2019
03/19 Attenuators for Measurement Jonathan Novick Novick-AX-Mar2019
02/19 An Experimental Cutterhead for Phonograph Disc Recording Jim Wood Wood-AX-Feb2019
02/19 DPA d:vote 4099 Instrument Microphone Stuart Yaniger Yaniger-AX-Feb2019
01/19 The PR-3: A High-Quality Stereo Preamplifier George Ntanavaras Ntanavaras-AX-Jan2019
11/18 The Incredible Egg Thomas Perazella Perazella-AX-Oct2018
09/18 Energy-Efficient Multi-Level Amplifier Solutions Ward Maas Maas-AX-Sept2018
06/18 The TSM-100:A Turntable Speed Measurement Device George Ntanavaras Ntanavaras-AX-June2018
06/18 Exploring Master Quality Authenticated (Part 2) Ron Tipton Tipton-AX-June2018
05/18 Exploring Master Quaility Authenticated (Part 1) Ron Tipton Tipton-AX-May2018
04/18 A DIY HRTF Binaural Microphone Head  Ron Tipton Tipton-AX-Apr2018
03/18 IK Multimedia ARC 2.5 Advanced Room Correction System Ron Tipton Tipton-AX-Mar2018
02/18 Realistic Stereo from Headphones Ron Tipton Tipton-AX-Feb2018
01/18 Music Streaming Services with Volume Normalization Ron Tipton Tipton-AX-Jan2018
01/18 The 6922 Project Robert Nance Dee Dee-AX-Jan2018
01/18 Reparing Switching Mode Power Supplies Scott Dorsey Dorsey-AX-Jan2018
12/17 Vinyl vs. CD (Part 3): Exploring Effects Ron Tipton Tipton-AX-Dec2017
11/17 Vinyl vs. CD (Part 2): Repeated Measurements Ron Tipton Tipton-AX-Nov2017
10/17 Build the Mojo Maestro Ethan Winer Winer-AX-Oct2017
10/17 Vinyl vs. CD (Part 1): Measuring the Sound Difference Ron Tipton Tipton-AX-Oct2017
1017 The Denali Voltage Reference Christopher Paul Paul-AX-Oct2017
10/17 Modern JFETs in Audio Circuits Dimitri Danyuk Danyuk-AX-Oct2017
9/17 True Bass in a Large Space Don Keele, Jr. Keele-AX-Sep2017
9/17 Hybrid Electrostatic Loudspeaker with Tailored Dispersion Charlie Mimbs Mimbs-AX-Sep2017
8/17 Early Reflections Ethan Winer Winer-AX-Aug2017
8/17 Loudness Revisited (Part 3): Software Tools Ron Tipton Tipton-AX-Aug2017
7/17 Hypex Electronics: Class-D High-Fidelity Ward Maas Maas-AX-July2017
7/17 Cherry Bomb—A VFET SET Amplifier (Part 2): Construction and Listening Tests Thomas Perazella Perazella-AX-July2017
7/17 Loudness Revisited (Part 2): Varying Methods of Loudness Measurement Ron Tipton Tipton-AX-July2017
06/17 Cherry Bomb—A VFET SET Amplifier (Part 1): The Concept, the Design, and the Plan Modifications Thomas Perazella Perazella-AX-June2017
06/17 A Sources 101 Update Walt Jung Jung-AX-June2017
06/17 Head Space: A Binaural Recording Session Neville Roberts
06/17 Loudness Revisited (Part 1): It All Started with Volume Control Ron Tipton Tipton-AX-June2017
05/17 High-Quality Hi-Fi Circlotron Power Amplifiers Gerhard Haas Haas-AX-May2017
05/17 Kismet 5: The 20th Anniversary Edition Fabio Camorani Camorani-AX-May2017
05/17 Streaming Music Experiences (Part 5): Streaming from Sonos and Deezer Ron Tipton Tipton-AX-May2017
  Streaming Music Experiences (Part 4): Streaming from Spotify
Ron Tipton Tipton-AX-April2017
04/17 DIM-100—A Device for Interfacing and Measuring with Sound Cards (Part 2): Assembly and Testing George Ntanavaras Ntanavaras-AX-April2017
04/17 Use 6C33 Tubes to Build a Push-Pull AB Amplifier Gerhard Haas Haas-AX-April2017
03/17 Build a TM50x Power Module Tester Chuck Hansen Hansen-AX-March2017
03/17 Streaming Music Experiences (Part 3): Streaming from TIDAL HiFi  Ron Tipton Tipton-AX-March2017
02/17 Streaming Music Experiences (Part 2): Streaming Multichannel Audio from Apple TV Ron Tipton Tipton-AX-February2017
01/17 Streaming Music Experiences (Part 1): Streaming Direct Stream Digital Audio Ron Tipton Tipton-AX-January17
01/17 Kii Three: The Next Step in Loudspeaker Evolution Jan Didden and Paul Wilke Didden-Wilke-AX-January2017


12/16 Room Correction Revisited (Part 6) Ron Tipton Tipton-AX-December2016
12/16 Optocouplers in a MOSFET Power Amplifier Design Richard K. Mains Mains-AX-December2016
12/16 Retro-Style High-Fidelity Preamplifier Bill Christie Christie-AX-December2016
  Room Correction Revisited (Part 5)
Ron Tipton Tipton-AX-November2016
11/16 Fairchild 275 Restoration Bruce Brown Brown-AX-November2016
11/16 KEMET's Electrolytic Capacitors: The PEG124 Series Scott Dorsey Dorsey-AX-November2016
10/16 Room Correction Revisited (Part 4) Ron Tipton Tipton-AX-October2016
10/16 Reggie-Phil Chris Paul Paul-AX-October2016
9/16 Room Correction Revisited (Part 3) Ron Tipton Tipton-AX-Sept2016
9/16 Eliminating Room Reflections in Woofer Measurements (Part 2) Richard K. Mains Mains-AX-Sept2016
8/16 Room Correction Revisited (Part 2) Ron Tipton
8/16 Eliminating Room Reflections in Woofer Measurements (Part 1) Richard K. Mains
7/16 Room Correction Revisited (Part 1) Ron Tipton
7/16 The D70 Stereo Tube Amplifier Mark Driedger
6/16 An Ecological Power Supply for Power Amplifiers Vincent Thiernesse Thiernesse-AX-June2016
5/16 Universal Tube Power Amplifier System Gerhard Haas
5/16 Higher Order Ambisonics (Part 2) Ron Tipton
04/16 Higher Order Ambisonics (Part 1) Ron Tipton
04/16 A 3.1 Channel System Bill Christie
04/16 TERESA de Luxe Harald Frank
03/16 Build an Audio Headroom Meter James. B. Wood Wood-Mar-2016
03/16 Playing with Room Correction Ron Tipton
02/16 Willow Revisited: A Design Celebrating the Enthusiasm and the Creativity of the Bulder Robert Nance Dee
02/16 Three-Way Loudspeakers with Active Crossovers Ron Tipton
02/16 Immersive Sound (Part 2): Experiments with Dolby Atmos Ron Tipton
01/16 The iSEMic 725TR Measurement and Recording Microphone Stuart Yaniger


12/15 Immersive Sound: A Look at Auro-3D Ron Tipton
12/15 A Single-Ended Type-A Monobloc Amplifier: Obtain 25 W with Two KT 88 Vacuum Tubes Gerhard Haas
11/15 Binaural Sound from Two Loudspeakers (Part 2): Software Options and Afforable Solutions Ron Tipton
11/15 Build the PhaseBuster! James Wood
10/15 Binaural Sound from Two Loudspeakers (Part 1): Crosstalk Cancellation and Spectral Compensation Ron Tipton
9/15 Enhanced Stereo (Part 3) Adding Realism to Sound Files Ron Tipton
8/15 Enhanced Stereo (Part2): Exploring Enhanced Stereo Solutions Ron Tipton Tipton-Aug-2015
8/15 The Right Filter (Part 3): Phase Corrector 2 Brings Us Closer to the Ideal Crossover Vincent Thiernesse
7/15 The Right Filter (Part 2): Crossover Frequency Tuning Vincent Thiernesse
7/15 Enhanced Stereo (Part 1): The Basics Ron Tipton
6/15 Classical Binaural Experiences Ron Tipton
6/15 The Right Filter Vincent Thiernesse
6/15 Construct a PIC-Based Audio DDS Device Larry Cicchinelli
5/15 Signal Dynamic and Loudness Ron Tipton
5/15 Extending the Arduino-Based Tube Power Amplifier Controller Mark Driedger
4/15 Playing with Ambisonics Ron Tipton Tipton_April15
4/15 Construct a Wall Wart Power Supply Larry Cicchinelli
4/15 Benchmark AHB2 Stereo
Power Amplifier
Gary Galo
3/15 The 5.1 Alternative from Digital Theater Systems Ron Tipton Tipton-AX-Mar15-A
2/15 Surround Sound—The Next Generation: Dolby Laboratories Ron Tipton Tipton-AX-Feb15
2/15 Arduino-Based Tube Power
Amplifier Controller
Mark Driedger Driedger-AX-Feb15
1/15 Quadraphonic Ron Tipton
1/15 MOD 102 Guitar Tube Amplifier Kit: Ready-to-Build Tube Sound Elektor.Labs


12/14 The Continuing Quest for Realistic Recorded Sound Reproduction Ron Tipton
11/14 Build a Powerful Tube Amplifier Gerhard Haas
8/14 Audio Spectrum Display Design Larry Cicchinelli
6/14 Build an FM-Stereo Generator George Adamidis


8/12 A 50-W BJT Stereo Amplifier Sam Dulaney
8/12 "PI" Design - A DIY Pre-Amplifier Interface Robert Nance Dee
5/12 An Audiophile's Battery Tube Amp - supplemental information Robert Nance Dee
4/12 Hybrid Electrostatic Loudspeakers Constructed with a Twist Charlie Mimbs
2/12 The 5002 Project - supplemental information Robert Nance Dee


12/11 Correction to Figure 5 (p. 30): "The Willow Preamp" Robert Nance Dee gain_stage__rev3.pdf
11/11 Class D Technology for Home Use Table: "The Abletec Class D Amplifier" Wim de Haan ClassD_Tech_4_home_use-TABLE.pdf
9/11 Additional information: “Impedance Matching Transformers for Ribbon Speakers" Angel Rivera Impedance Angel Rivera - Rivera_Updates_AX_9-11.pdf
8/11 ECC99 Excel spreadsheet too: "Designing Amps for Maximum Linearity with the ECC99" Rudy Godmaire ecc99designer.xls


9/10 Clean Sound from the Drainpipe 8 from Popular Electronics, June 1962 David Weems Weems Drainpip 8.pdf
8/10 Additional Figures: "The Metz Preamp" Reinhard Metz Main board layout.jpg
Control and switch board.jpg
LED board.jpg
Preamp firmware high-level flowchart.jpg
6/10 PCB patters used to contruct the crossover filters, and parts placement: "A Three-Way Tri-Amp Center-Channel System" Andreas Schilloff Schilloff PCB
3/10 XLS files: "A Power Supply Spreadsheet" Paul J. Stamler PowerSupply60Hz.xls


11/09 Color Figures (Fig. 4-6): "Distortion Meter" Ed Simon Simon3126_fig4.jpg
11/09 Audio tracks: "The Essex Echo: Audio According to Hawksford, Pt. 1" Jan Didden Hawksford Jitter
10/09 Datasheet: "paX Protection System, Part 3" Jan Didden Didden3123 Datashhet.pdf
9/09 paX Amplifier Construction Guide: "paX, Part 2" Jan Didden Didden3038 Guide.pdf
8/09 Circuit boards: "Maintaining Your Balance, Part 2" Thomas M. Perazella Perazella3083 Figure 2.pdf
Perazella3083 Figure 3.pdf
Perazella3083 Figure 4.pdf Perazella3083 Figure 5.pdf
7/09 Rebuilding a Cheap Chinese EL84 Amp Merlin Blencowe Blencowe2996.pdf
7/09 Feedback loop set up: "Setting Feedback On the Mullard 20" Pierre Touzelet Feedback loop set up on the Mullard 20 W.doc
6/09 Design and Measurement Of a Dipole Microphone Mark Williamsen Williamson3063.pdf Measurement Tips
5/09 ezDAC Claudio Negro Negro3051.pdf
4/09 Modding the Music Hall CD25.2 CD Player Kit Ryan Ryan3050.pdf
3/09 Excel application for calculation of Vg1T/U : "Vg1 Correlations" Rudy Godmaire Vg1 Correlations.xls
2/09 A De-Emphasis Test CD Gary Galo Galo3025.pdf
2/09 Noise Measurements of the LSK389B Dual JFET Dennis Colin Colin2993.pdf
1/09 Tri-Way PC boards and parts list: "Tri-Way Low Voltage Supply Part 1" Paul J. Stamler stamler3006_fig4a.pdf
Tri Way Worked Examples Parts lists.xls
1/09 Show Reports: The Munich Hi-End Show 2008, The Rocky Mountain Audio Fest, Burning Amplifier 2008 Jan Didden Didden_Munich.pdf


12/08 Printed circuit boards: "An Automated Level Control" J.R. Laughlin PCB_1.pdf
10/08 Figures 3 & 4: "A Beginner 6BQ5 SE Amp" Rick Spencer Spencer2957_fig3.pdf
10/08 An Isolation Transformer, Part 3 Ed Simon Simon2945.pdf
10/08 Testing Loudspeaker: Which Measurements Matter, Part 1 Joseph D’Appolito D'Appolito2960.pdf
9/08 Testing Loudspeakers: Which Measurements Matter, Part 1 Joseph D’Appolito D'Appolito2959.pdf
9/08 More Box, Less Sawdust Mark Rumreich Rumreich2964.pdf
9/08 A Line-Cleaning Filter, Part 2 Ed Simon Simon2944.pdf
8/08 An On-Peak Power Supply, Part 1 Ed Simon Simon2943.pdf
7/08 A Belt-Drive Turntable Upgrade Gary Galo Galo2931.pdf
7/08 A Graphical Evaluation of Harmonic Distortion in Valves Pierre Touzelet Touzelet2917.pdf
6/08 A Multiple "Wall-Wart" Power Supply Ron Tipton Tipton2926.pdf
6/08 Is SACD Doomed? Gary Galo Galo2941.pdf
5/08 Valve (Tube) Regulated Power Supplies Terry Bicknell Bicknell2890.pdf
5/08 The Sidewoofer Line Array Ken Bird Bird2483.pdf
5/08 The Mighty Midget Pete Millet Millet2903.pdf
4/08 Horn Theory: An Introduction, Part 2 Bjørn Kolbrek Kolbrek2885.pdf
4/08 Everything You Wanted to Know About SPL Meters Ethan Winer Winer2901.pdf
3/08 Soldering: A Tutorial Ed Simon Simon2894.pdf
3/08 Horn Theory: An Introduction, Part 1 Bjørn Kolbrek Kolbrek2884.pdf
3/08 Figure 12: "The Noise (Analysis) Machine" Jack Walton Walton2905_fig12.pdf
3/08 Circuit Board Basics: "Amp6" J.R. Laughlin Laughlin2887cb.pdf
2/08 AES Multi-Tracks in New York 2007, Part 1 David J. Weinberg Weinberg2906.pdf
1/08 In Praise of Wall Warts Paul J. Stamler Stamler2874.pdf
1/08 A Hybrid High-Fidelity Power Amplifier Bill Christie Christie_fig4.pdf
To request materials from 2007 and beyond, please contact customer service.