The Audioholics

Includes information, reviews and technical guides for equipment and accessories.
http://www.audioholics.com/

AudioKarma

Focused to stereo high-fidelity, including tube audio, home theater, and especially vintage 1970s gear, even vintage TV receivers. Site offers discussion forums, help, and general information for the audio enthusiast.
http://www.audiokarma.org/

Retro hi-fi

A vintage high-fidelity portal for discussing and displaying classic and vintage amplifiers, tuners, turntables such as Thorens, Quad, and pick-up arms. Also, provides a classified listings.
http://www.retrohifi.co.uk/

Pancake Audio

Discussion forums for hi-fi and DIY audio equipment, tips and tweaks, and classifieds.
http://www.pancakeaudio.com/

Road Trip to Ken Kantor's New Company

Photo album and text of a visit to Intelligent Audio Systems, a start-up audio company founded by industry veteran Ken Kantor.
http://www.arsenal.net/speakers/IAS/Road-Trip%20to%20IAS.htm

Remote Central

Information on mid- to high-end universal remote controls: product reviews; message forums.
http://www.remotecentral.com/

AudioWorld

Audio industry, news, reviews, ratings, references, company directory, and cross reference.
http://www.audioworld.com/

Audio Ideas Guide

Hi-fi and Home Theater e-zines. Reviews, news, articles, tweaks, and other audiophile resources.
http://www.audio-ideas.com/

Sonic State

The music and pro-audio theme park. Features classifieds, synth site, directory, and chat.
http://www.sonicstate.com/

Audioed Resources Site

Offers educational resources for the International sound recording community.
http://www.audioed.com.au/

Wired 4 Music

Resource of information on Super Audio CD, DVD-A, DSD, Surround. Practical tips on hi-res recording and 5.1 surround.
http://www.wired4music.com/

5dot1.com

Promotes the use of surround sound and multi-channel audio systems. Sites includes information on how to listen to and record for 5.1 surround sound, articles of Dolby Digital, DTS and using AC-3 on CD-R discs.
http://www.5dot1.com/

AudioNova

Audio resource for manufacturers, forums, magazines and journals.
http://www.audionova.nu/

Home Theater Discussion Forum

Database of home theater information, set-up hints and buyers guides.
http://www.smr-archive.com/

NASG naim audio

Short guide to naim audio including overview, history and gallery.
http://impulse7.com/naim/

HeadRoom

Offers reviews and evaluations of headphone equipment. Includes a buyers guide.
http://headroom.headphone.com/layout.php

Los Angeles Audio File

Home theater and audio community with product reviews.
http://www.laaudiofile.com/

High End Audio

Discussion forum on audio, amplifiers and home theater.
http://www.highendaudioforum.com/

Tuner Information Center

Focused on vintage stereo tuners. Site includes reviews of many different tuners, provides explanations of how tuners work, explains about tube tuners, and notes alleged fraudulent online auctions.
http://www.fmtunerinfo.com/

Useful Audio Potpourri, A

Focuses on indoor FM antenna design and a Hafler circuit for surround sound. Also, includes a directory of related links.
http://members.tripod.com/martin_leese/Audio/

Andromeda

A privately owned picture and electronic music studio. A composition workshop for contemporary music.
http://www.vaarboda.se/andromeda/andromeda-english.html

Audio Review

Offers consumer-generated product reviews, ratings, prices for brands and models.
http://www.audioreview.com/