|The Audio Pages|
|Elliott Sound Products|
|Professional results for the Do-It-Yourself enthusiast||Average >1,700 Visitors Per Day Since Jan 2001|
Pages Last Updated May 2023
Welcome to ESP, the home of DIY audio and electronics articles, and PCBs for popular projects. Electronics is a wonderful hobby, and with DIY there is a huge scope to get the best performance for less money than otherwise. DIY is fun and educational, and by building your own audio equipment, you get to learn electronics as well as build equipment that may cost a great deal more in the shops. ESP is committed to providing high quality projects that are known to work, printed circuit boards (PCBs) for the most popular projects, and to assist you if necessary to complete or debug your project. There is a very wide range of power amplifiers, preamps, guitar/ bass amplifiers, studio equipment, effects, and other projects to build, including loudspeakers, subwoofers, and many others. Purchase PCBs to gain access to even more information. sound-au™ is a trade mark of Elliott Sound Products, and represents the site's primary focus (sound) and where I'm located (au - Australia).
IMPORTANT: Please see the disclaimer for information about these pages.
|Auto Power-On Circuit (Mk II)|
High Voltage, Low Current DC Source
JFET Test System
DIY Current Feedback Opamp
Resistor Substitution Box
Low-Power Isolated PSUs
Distortion Measurement System
Go to the Contact Page to send me an email.
|This site can't exist without purchases from readers, but if you don't need to buy anything please consider a donation to ensure the site's survival.|
|Products & Services||Update|
|Projects||Complete designs and ideas, with schematics and details of how each circuit works, including alternative uses (if applicable)||May 2023|
|Project List||Projects 'Quick Access Links' To All Projects In Numerical Order||May 2023|
|Purchase Information||Project Printed Circuit Boards and other ESP merchandise||Jun 2022|
|Price List||Complete Pricelist for all Products - Includes postage to most regions (tracked airmail is used for all orders.||Dec 2020|
|PayPal Shopping Cart||ESP products in a convenient shopping cart (USD non-Australian purchases only)||Dec 2021|
|Contact||Send an email to ESP|
|Articles & Information||Update|
|Articles||Amplifier and power supply design, loudspeakers, electronics theory, beginner information, test and measurement, etc. +||Mar 2023|
|App. Notes||Application notes, covering a wide range of different applications, not necessarily audio related||May 2022|
|Lamps & Energy||Covers not only lamps, but inrush current, external power supplies (aka 'wall warts'), power factor and other poorly understood topics.||Jul 2020|
|Valves||Valve (vacuum tube) amplifiers, information and analysis. Includes a couple of valve-related projects||Jan 2019|
|The Class-A Amplifier Site||TCAAS (by Geoff Moss in the UK) is now hosted as an archive by ESP. Please note: Queries will be answered, but only if kept brief.||Nov 2012|
|Clocks||There is great synergy between my life-long career and my hobby - see why here.||Dec 2019|
|Education||Customised projects for schools, technical colleges and universities||2003|
|Consulting||ESP also offers custom design and consulting services||2002|
|Navigation & Utilities|
|Site Map||Complete index of all available pages on this site|
|Site Search||Use the Freefind Custom Search to find a particular article or project|
|Google™ Search||Search the ESP website with Google™ Custom Search to find what you are looking for|
|ESP Forum||Discuss ESP projects and articles with other readers on the ESP Forum. When you sign up, you get an email to verify your address.|
Requires 'Dual Login' - initial login details ... Username ... forum, password ... esp-forum
|ESP Guestbook||View or Sign the ESP Guestbook (Note: Requires login - details ... Username ... guest, password ... esp-gb )|
|ESP Gallery||Have a look at some of the outstanding builds using ESP boards - Contributions welcome!||Feb 2022|
|Privacy, Ethics & Security||Update|
|Copyright||A few facts about copyright, and what you can and cannot do with other peoples' material.||Apr 2011|
|Counterfeit Devices||There are many counterfeit (fake) devices, and it pays you to be vigilant before buying anything that looks 'too cheap'.||Jan 2022|
|Disclaimer||The fine print. Please make sure that you read it thoroughly.||2002|
|ESP Philosophy||My philosophy is based on factual (evidence based) information, and this article explains the basis behind all ESP articles and projects||May 2020|
|Privacy||ESP's privacy and ethics policy||2002|
|Spam/ Scams/ Security||Some things for you to consider, regarding the threats posed by the Internet||Feb 2021|
|Advertisements||Why does ESP have advertising on most of the pages?|
|Contribute||If you have an article or project you would like published, let me know||Jun 2005|
|Downloads||Various useful programs and spreadsheets to make your life easier||Dec 2004|
|FAQs||Frequently Asked Questions. Check here first||Oct 2007|
|Links||to my favourite sites (plus additional and miscellaneous links)||Apr 2005|
|Useful & Miscellaneous||Various things that don't seem to have a real home anywhere else||Apr 2010|
|Why DIY?||There are many reasons that people DIY, and there are also many benefits.||May 2008|
| projects and articles are free for personal use only. Any commercial use is strictly prohibited by international copyright laws without the express written consent of Rod Elliott. Images and text are © 1999-2022 Rod Elliott (or as shown on each individual page), unless otherwise stated. Web and graphics design by Rod Elliott except for specific (non ESP) logos where used, whose copyright is the property of the respective owner(s).
Links - Anyone wishing to link to my pages may do so freely, but please make the main index page (sound-au.com) the sole link. Please do not link to individual pages or image files without asking first. This ensures that visitors get to see all that the site has to offer, and not just a part of it.
Anyone wishing to do so may use this image for linking to the ESP site.
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|Elliott Sound Products
PO Box 233
Thornleigh NSW 2120
ABN 77 069 281 668
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ESP acknowledges the Traditional Custodians of the land upon which it operates, and recognises their continuing connection to land, water and community. We pay respect to Elders past, present and emerging.
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