High Efficiency (Exponential) Loudspeaker Set For Disco Application
- Physics principles, calculations, drawings, specifications, pictures, and internet resources/references. PDF version of the site available as well.
- http://www.home.zonnet.nl/andre.barel/loudspeaker.htm

Subwoofers - What You Need To Know
- Explains types, crossovers, alternatives, shopping and installation tips.
- http://hometheater.about.com/cs/loudspeakers/a/aasubwoofera.htm

Epinions: Computer Speakers
- Comparisons and reviews written by consumers.
- http://www.epinions.com/cmhd-Speakers-All

eBuying Guides: Where to Buy Speakers/Headphones
- Concentrates on where to shop for products, but also has staff-produced buying guides. Some of the guides are links to other buying guide sites.
- http://www.ebuyingguides.com/where/speakers_w.htm

ReviewCentre.com: Speaker Reviews
- Consumer reviews on speakers.
- http://www.reviewcentre.com/items21.php3

Epinions: Speakers
- Consumer-generated reviews, buying tips and advice, ratings, price information, and searchable in a variety of ways from price to product type.
- http://www.epinions.com/elec-Audio-Components-Speakers-All