Offers a hub for exchanging information and swapping patches. Includes registration details.

Offers several discussion forums, articles, news and photos. Includes registration details.

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.

Support for acoustic research, repair and upgrade information, discussion forum, and links.

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.

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.

Reference source on this classic electrostatic loudspeaker.

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.

A thorough unofficial resource for Nakamichi tape decks.

HiFi and music guide including equipment and music reviews, and related links.