|The Audio Pages|
|Elliott Sound Products|
|Professional results for the Do-It-Yourself enthusiast||Average >3,000 Visitors Per Day Since Jan 2001|
Pages Last Updated November 2018
Welcome to ESP, the home of DIY audio articles, projects and (some) shortform kits. Audio is a wonderful hobby, and with DIY there is a huge scope to get the very best performance for a lot less money than otherwise. DIY audio is fun and educational, and by building your own audio equipment, you get to learn electronics as well as build equipment that would 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.
IMPORTANT: Please see the disclaimer for information about these pages.
You should also read the Links Info to see ESP's revised links policy. It explains why I use external links sparingly.
|Low-voltage, Low Power Amplifier|
Constant Current Transistor Tester
Fully Differential Amplifier
Hobby Servos, Speed Controls & Tachometers
Rectifiers - Common Types Explained
Single Supply BTL Amp DC Protection
FETs (& MOSFETs) - Applications, Advantages and Disadvantages
Instrumentation Amplifiers (INAs)
It is with great sadness that I announce the death of Siegfried Linkwitz. He passed away on 11 September 2018, and will be greatly missed by audio enthusiasts worldwide. I wish to express my condolences to his family, business associates and his many followers. Siegfried was responsible for the Linkwitz-Riley crossover (along with a co-worker Russ Riley), and also developed the Linkwitz Transform Circuit.
While his loudspeaker designs may not be to everyone's taste, there is no denying the effort and passion that Siegfried applied to all aspects of his audio adventures. His contributions will be with us for many years to come, a fitting memorial to an exceptional designer.
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|
|Price List||Complete Pricelist for all Products||May 2017|
|Purchase||Project Printed Circuit Boards and other ESP merchandise||May 2017|
|PayPal Shopping Cart||ESP products in a convenient shopping cart (USD non-Australian purchases only)||Nov 2018|
|Projects||Complete designs and ideas, with schematics and construction details||Nov 2018|
|Contact||Send an email to ESP|
|Advertisements||Why does ESP have advertising on most of the pages?|
|Articles & Information||Update|
|Articles||Amplifier and power supply design, loudspeakers, electronics theory, beginner information, test and measurement, etc.||Sep 2018|
|Lamps & Energy||All material under this heading has its own separate index||Jan 2017|
|Valves||Valve (vacuum tube) amplifiers, information and analysis. Includes A couple of valve-related projects||Apr 2015|
|App. Notes||Application notes, covering a wide range of different applications, not necessarily audio related||Apr 2018|
|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|
|Education||Customised projects for schools, technical colleges and universities||2003|
|Consulting||ESP also offers custom design and consulting services||2002|
|Site Map||Complete index of all available pages on this site|
|Search||Search the ESP pages to find what you are looking for|
|Google™ Search||Search the ESP pages with Google™ Custom Search to find what you are looking for|
|Forum||Discuss ESP projects and articles with other readers on the ESP Forum. Username ... forum, password ... esp-forum|
|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'.||Nov 2018|
|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||Oct 2018|
|Privacy||ESP's privacy and ethics policy||2002|
|Spam/Scams/Security||Some things for you to consider, regarding the threats posed by the Internet||Apr 2018|
|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|
|Clocks||There is great synergy between my life-long career and my hobby - see why here.||May 2014|
|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 copyright © 1999-2018 Rod Elliott, 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.
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|Elliott Sound Products
PO Box 233
Thornleigh NSW 2120
ABN 77 069 281 668
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