How Speakers Work - Colorful animations and a video help describe how speakers really work. The Subwoofer DIY Page - Includes information on designing and building subwoofers. Zaph|Audio - Features DIY Speaker Projects and a blog. Transmission Line Speakers - A collection of DIY Transmission Line Speaker projects. Humble Homemade Hifi - Several well documented loudspeaker projects. Loudspeaker Projects - Troels Gravesen's DIY Loudspeaker Projects has a number of very well built speaker projects. Collo's DIY Subwoofer Enclosures - DIY subwoofer builder gives tips on the construction of subwoofers, SPL meter usage and home theater setup. Roman Bednarek Speaker Designs - A number of well documented speaker designs that are very practical and keep budget in mind. MurphyBlaster Productions - Dennis Murphy displays some of his better non-commercial designs and modifications. Paul Carmody's DIY Speaker Projects - A collection of DIY Speakers projects by Paul Carmody.