Read the review of the GR 1.6 Golden Ratio Amp in The Tone Quest Report   NEW!    Read JCA Circuits' Builder's Profile in Vintage Guitar Magazine Read the review of the GR 1.6 Golden Ratio Amp in Vintage Guitar Magazine Check out JCA Circuits' Builder's Profile on page 118 in the August 2007 issue of Vintage Guitar Magazine with Joe Bonamassa on the cover!   Check out reviews of the GR 1.6 at Harmony Central   View our Press Release at Harmony Central       Read about us in this Pottstown Mercury Newspaper Article

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