Keeley Electronics’ Black Glass British Fuzz is hand-built in the U.S. using an OC81-based design with a circuit modified for increased high frequency and low noise. The company says other design mods have solved temperature issues that often affect fuzz units, and it accepts a standard/modern 9-volt power supply. Controls include Fuzz, Tone, and Level. Housed in a powdercoated enclosure, it’s wired with true-bypass switching. For more, visit www.rkfx.com.