Offers consumer-generated product reviews, ratings, prices for brands and models.

Includes information, reviews and technical guides for equipment and accessories.

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.

Audio industry, news, reviews, ratings, references, company directory, and cross reference.

Blog with news and views about the audio industry and design.

Home theater and audio community with product reviews.

Information on mid- to high-end universal remote controls: product reviews; message forums.

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.

The music and pro-audio theme park. Features classifieds, synth site, directory, and chat.

Focused on vintage FM stereo tuners. Reviews, explanations of how tuners work, explains about tube tuners, and notes on alleged fraudulent online auctions.