Dark Blood Distortion Effects Pedal. The tone of the KHDK Dark Blood distortion effects pedal is tube-like and mid-heavy with added high gain. Its unique power is its distinctly amp-like sound. Richly articulate and deep, Dark Blood can provide the main tone into your clean amp and is ideal as a fly rig and a backup to an amp or modeling rig. With its high gain and aggressive, uncompromising dynamics, this is the ultimate pedal for gain-freaks, designed both for palm-muting riffs and searing, high-gain solos. Dark Blood is built on KHDK's original circuit combining solid-state and MOSFET technology. In classic metal fashion, a treble booster was added to the front end of the circuit to push your tone to the limit. Like all KHDK pedals, Dark Blood is proudly handcrafted and quality-tested in Kentucky, USA.