Ensoniq - an MSN Group
- Offers a hub for exchanging information and swapping patches. Includes registration details.
- http://groups.msn.com/Ensoniq

ZeroGain
- Offers several discussion forums, articles, news and photos. Includes registration details.
- http://www.zerogain.com/

Audio Nirvana
- Devoted to high fidelity with special attention to vintage equipment and tube equipment. Topics include news, reviews, tweaks, gallery, articles, auditions, links. English and Spanish options.
- http://audio-nirvana.fortunecity.net/

The Classic Speaker
- Support for acoustic research, repair and upgrade information, discussion forum, and links.
- http://www.classicspeakerpages.net/

Scruff & Audio Research
- Tribute to Audio Research Corporation (ARC) SP tube preamplifiers. Photos and description of SP-2, SP-3, SP-6, SP-8 preamps. Information about tubes, line conditioners and related topics.
- http://members.aol.com/unoname/sp_preampindex.html

Kenwood L-07D Direct Drive Turntable
- Unofficial site that focuses on this quartz PLL direct drive turntable developed in the 1970's. Learn more about technical specifications, history, photo gallery, parts and supplies.
- http://www.l-07d.com/

The Quad ESL
- Reference source on this classic electrostatic loudspeaker.
- http://www.quadesl.org/

Audiotools.com
- Collects information on past and present models of Hi-Fi and recording equipment along with links to, history and contact information for companies and individuals active in the field.
- http://audiotools.com/

Naks.com
- A thorough unofficial resource for Nakamichi tape decks.
- http://naks.com/

The Analog Dept.
- System gallery, online user manuals and maintenance information on Thorens turntables.
- http://www.theanalogdept.com/

Roger Russell and McIntosh
- Roger was former Director of Acoustic Research for McIntosh Labs. Offers information and photos of McIntosh equipment.
- http://www.roger-russell.com/

BlueFi
- Includes news and reviews. Plus a forum, polls and user feedback.
- http://www.bluefi.co.uk/