headphone amplifiers

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Ruby Amp in a Magic 8-ball

Ruby Practice guitar amp housed in a magic 8 ball

The Ruby Amp is a great little battery powered solidstate practice amp. The design is based on the Little Gem design which in turn comes from the Smokey Amp designed by Dave Stork on www.blueguitar.org. The design uses relatively few components and is a good DIY project. Cigar box guitar maker J.K. built a Ruby Amp but found himself hunting for a suitable enclosure for it. Then he noticed an old magic 8 ball that looked just right with a perfect sized hole for the speaker.

Is this a good amp? ...<Shakes ball vigourously>... Signs point to yes!

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VOX amPlug


The Vox amPlug is a range of mini headphone amplifiers designed to simulate the sound famous amplifiers. The amPlug plugs directly into your guitar.

You can choose one of three amp options: VOX AC30, Classic Rock (Marshall), or Metal (Mesa-Boogie). There is an auxiliary input that allows you to you jam along with your CD or MP3 player. Circuitry is all analog. Manufacturers claim up to 15 hours of battery lifewith the supplied AAA batteries (depending on how hard you rock!). Dimensions are 86 x 80 x 31 (mm) or 3.39" x 3.15" x 1.22".

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Located in Benicia, California, Dunlop Manufacturing, Inc. was founded as a small, family-owned and operated company in 1965, and has since grown to be a leading manufacturer of electronic effects, picks, capos, slides, strings and other musical instrument accessories. Dunlop is the home of such products as the Cry Baby wah and Tortex picks.

Dunlop brands include MXR, CryBaby and Way Huge Electronics.


The German based Behringer company designs and manufactures audio products, including public address systems, mixing consoles, amplifiers and audio processing units.  Their guitar gear includes a large range of stompbox effects, amplifiers, interface boxes and some guitars.

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