A Dirty Germanium Booster built around a selected Bulgarian SFT transistor, OJAY adds grit, body, and warmth to clean tube amps while pushing edge-of-breakup tones into rich crunch, all without losing clarity. The Range control lets you shape your tone, from thick, full lows to sharper treble boosts. When boosting into a crunchy amp, rolling back your guitar’s volume brings out those signature Germanium sparkles, delivering cleaner tones with more clarity than you’d get without. Setup for 9VDC Centre Negative power only Controls – Output – Volume level Range – EQ Shift – Left (Boost mode) / Right (Compression mode)