The TruTone is a “second back” for your acoustic, designed to increase its resonance

(Image credit: The TruTone)

A few years ago, Wales-based builder Mark Adams unveiled the Jam Jar, which fashioned a working guitar amp out of a two-and-a-half-inch speaker crammed into a glass jar.

Now Adams is back with another creation, the TruTone, a retro-fit “second back” for acoustic guitars.

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Richard Bienstock

Rich is the co-author of the best-selling Nöthin' But a Good Time: The Uncensored History of the '80s Hard Rock Explosion. He is also a recording and performing musician, and a former editor of Guitar World magazine and executive editor of Guitar Aficionado magazine. He has authored several additional books, among them Kurt Cobain: Montage of Heck, the companion to the documentary of the same name.