DIY guitar site that features guitar tube amps, pedal building and related projects.

Regularly updated blog containing a lot of information about DIY Audio.

Describes a few tube amplifier projects including schematics and descriptions of the circuitry.

Showcases the author's build of tube amplifiers, pre-amplifiers and restorations of tube radios.

Description and photos of multi-amp PCB with three integrated amplifiers each PCB and 24 dB/Octave Linkwitz-Riley Electronic filters. Configurable as a bi-amp or tri-amp.

Projects by Nelson Pass including amplifiers, preamps and loudspeakers. Site offers information on circuit boards, FAQs and how to articles.

A photographic gallery of DIY Audio Projects. The projects include are pictures of speakers, amplifiers, cables and more. Share photographs of your DIY Audio creations.

Discussion of vacuum tube audio amplifiers and high fidelity equipment with photos and schematic diagrams.