Technical Audio and Reference Information
Technical Audio and Reference InformationOur collection of technical articles and papers, reference information, online calculators and tutorials related to Do-It-Yourself (DIY), Hi-Fi audio and electronics. If you have any information that you think may be of value to fellow DIY audio and electronic hobbyists that you would like to share, contact us. For those new to DIY audio and electronics, take a moment to browse our DIY audio, speakers and electronics book suggestions.
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Speakers
- Baffle Step Correction Compensation Network and Circuit Calculator
- Zobel / Impedance Equalization Network and Circuit Calculator
- Dummy Speaker Load Box (Supersedes DIY Speaker Dummy Load)
- Thiele / Small (T/S) Speaker Parameter Definitions
- Aperiodic Loudspeaker Enclosure Design
- Fostex FE206En Fullrange Speaker Driver Modifications and Tweaks
- Small Fullrange Speaker Driver Modifications and Tweaks
Amplifiers
- Dummy Speaker Load Box (Supersedes DIY Amplifier Dummy Load)
- Grounding and Shielding for your DIY Amplifiers
Vacuum Tube Audio
- 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization
- Optimization of the 6L6 Single-Ended (SE) Ultra Linear (UL) - [External Link] NEW!
- Power Supply Design for Vacuum Tube Amplifiers
- How to Calculate Audio Output Transformer Load Resistance
- Grounding and Shielding for your DIY Audio Projects
- The Care and Feeding of LM317 and LR8 Integrated Circuit Regulators, Particularly in Valve Circuits
- Design and Construction of Vacuum Tube Amplifiers - [External Link]
- Vacuum Tube (Valve) Amplifier Wiring Color Code - [External Link]
Electronics
- American Wire Gauge (AWG) Cable Conductor Size Chart and Table
- Ohm's Law and Ohms Law Calculator
- Basic Electronics (Resistors, Capacitors and Inductors in Series and Parallel)
- Grounding and Shielding for your DIY Audio Projects
- The Care and Feeding of LM317 and LR8 Integrated Circuit Regulators, Particularly in Valve Circuits
- Component Tolerance and Parts Selection
- Resistor Color Codes Guide
- Common Transistor Cases
- LM317, LM338, LM350 Voltage Regulator Calculator, Information and Circuits
- LM317, LM338, LM350 Current Regulator Calculator and Circuits
Technical Audio Publications
Miscellaneous Audio Papers
- Loudness and Pitch - Harvey Fletcher - - Bell Laboratories Record (PDF 1.4MB)
Vacuum Tubes (valves)
- A Direct-Coupled Amplifier with Cathode Follower - Raymond H. Bates - Radio & Television News - November 1949
- The Cathode Follower - A.P. Blackburn - The Radio Constructor - November 1955 - (low resolution scan)
- The Single 300B Amplifier: A Model 91 for 1992 - Joe Roberts - (PDF 759kB)
- 12AX7 / 6V6 Single-Ended Class-A Tube Amp Design and Construction - Student Project - (PDF 1.4MB)
- Design of an Audio Frequency Vacuum Tube Amplifier - Brad Bryant (M.Sc. thesis) - (PDF 569kB)
- 10W 6V6 Push-Pull Vacuum Tube Amplifier (Class-AB) - Michael S. Holden - (PDF 3.4MB)
- Feedback Amplifiers - H.S. Black - Bell Laboratories Record - (PDF 1.6MB)
- Compact Hi-Fi Power Amplifier - Melvin Leibowitz - Electronics World - June 1961
Audio Cables
- The Damping Factor Debate - George L. Augspurger - (PDF 694kB)
- Damping, Damping Factor, and Damn Nonsense - Floyd E. Toole - (PDF 1.33MB)
- Speaker Cables: Science or Snake Oil - Nelson Pass - (PDF 347kB)
Loudspeakers
- A Model of Open-Baffle Loudspeakers - Juha-Backman (1999) - (PDF 1.1MB)
- Alpha Transmission Lines - Rick Schultz - (PDF 951kB)
- Closed Box Loudspeaker Systems Part I - Analysis - Richard H. Small - (PDF 804kB)
- Closed Box Loudspeaker Systems Part II - Synthesis - Richard H. Small - (PDF 601kB)
- Direct Radiator Loudspeaker System Analysis - Richard H. Small - (PDF 985kB)
- Factors in the Design of Loudspeaker Cabinets - H.D. Harwood - (PDF 1.9MB)
- Horn Loudspeaker Design Part 1 - J. Dinsdale - (PDF 832kB)
- Horn Loudspeaker Design Part 2 - J. Dinsdale - (PDF 1.4MB)
- Horn Loudspeaker Design Part 3 - J. Dinsdale - (PDF 953kB)
- Line Source Loudspeaker - Paul H. Taylor - (PDF 888kB)
- Loudspeakers in Vented Boxes - Part I - A. N. Thiele - (PDF 854kB)
- Loudspeakers in Vented Boxes - Part II - A. N. Thiele - (PDF 1.1MB)
- Loudspeakers on Damped Pipes - G. L. Augspurger - (PDF 3.9MB)
- Non-resonant Loudspeaker Enclosure Design - A. R. Bailey - (PDF 549kB)
- Non-resonant Loudspeaker Enclosure Design - Letters to the Editor - (PDF 201kB)
- Transmission Line Loudspeaker Enclosure - A. R. Bailey - (PDF 499kB)
- Vented Box Loudspeaker Systems - Part I - Richard H. Small - (PDF 746kB)
- Vented Box Loudspeaker Systems - Part II - Richard H. Small - (PDF 621kB)
- Vented Box Loudspeaker Systems - Part III - Richard H. Small - (PDF 451kB)
- Vented Box Loudspeaker Systems - Part IV - Richard H. Small - (PDF 340kB)