HEATKEYS

Tests your audio equipment, speakers, room acoustics and hearing. Audio signals and test tones playable online. High resolution sound test files available for free download.

YouTube is a place to discover, watch, upload and share videos.

The definitive source for real-time news, information, and discussion about the Chevrolet Volt electric car.

Dolby is a globally recognized innovator of audio, imaging, and voice technologies for cinemas, home theaters, PCs, mobile phones, and games.

NoiseAddicts is a Music and Audio virtual magazine. This music blog is for anyone who is interested in music, audio technology, musicians, musical instruments or audio-related stories and news

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This is a discussion forum dedicated to Home Theater and the products used.

Home theater forum for discussion of home theater systems design, construction and electronics... DIY subwoofers, Blu-ray reviews and DVD reviews.

News and reviews from the world of gadgets, gear, apps and the web

Head-Fi.org: Head-Fi covers headphones, portable audio, earphones, earbuds, headphone amplifiers and audiophile equipment.

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Digital Trends is your source for technology news, product reviews, buying guides and free software downloads, Digitaltrends.com.