I design and build these myself. The Stone Groove is the ultimate in real tube warmth and high gain distortion / overdrive pedals. It has 18VDC and takes any 12AX7 / ECC83, with zero unwanted noise. Our gold capacitors and glass resistors are several dollars instead of cents each in bulk. For photos, demos and detailed information.
The item "STONE GROOVE Real 12AX7 Gain 18V Tube Overdrive Distortion Guitar Effect Pedal" is in sale since Friday, March 8, 2013. This item is in the category "Musical Instruments & Gear\Guitars & Basses\Parts & Accessories\Effects Pedals\Distortion & Overdrive". The seller is "masterbuiltamps" and is located in Johnston, Rhode Island. This item can be shipped worldwide.