XO Gold — Mechanical Resonator XO Gold is a compact experimental percussion instrument built around a mechanical spring resonator with a built-in pickup and digital effects processor. The spring acts as the sound source, which you can play by hand or trigger electronically. It can function as a percussion instrument, a resonant sound generator, or an unusual effects processor. Key Features Mechanical spring resonator with built-in pickup Playable by hand or with trigger / gate signals Works as percussion, resonator, or effects processor Compact experimental sound device Sound Capabilities Bass drum–like hits Plucked and metallic sounds Karplus–Strong–style resonances Bit-crushed and distorted textures Resonant basslines with sequencing Effects Resonant delay / feedback Bit-crushing Ring modulation Pitch shifting Controls Three parameter modes (LED indicated): 1 blink — Feedback 2 blinks — Size / resonance length 3 blinks — Time Each mode remembers the knob position. Connectivity Trigger / Gate input CV input for parameter modulation (vactrol-style response) XO Gold is designed for hands-on experimentation, helping you discover unique resonant “sweet spots” in the mechanical spring. 12 hp 12v+ 92mA 12- 0mA 5 0 mA