Used Universal Audio knuckles Guitar Preamp

Used Universal Audio Knuckles Guitar Preamp in good condition, delivering rich tube-style tone with classic UA warmth and clarity. Features include high-voltage Class A circuitry, a custom transformer-balanced output, and variable input impedance for tonal flexibility. Designed for both studio and stage, this preamp adds character and definition to any guitar signal. Shows light cosmetic wear but functions perfectly—ready to enhance your tone with that unmistakable Universal Audio quality.