Formula B That Screamer

The That Screamer 4558 packs three legendary overdrive tones into one beast of a pedal. Switch between TS808, TS9, and TS10 flavors and unleash pure rock ‘n’ roll grit with vintage mojo and modern punch.

The Formula B That Screamer 4558 is a hand-built boutique overdrive inspired by one of the most legendary circuits in guitar history. This pedal delivers the warm, dynamic drive tones players have loved for decades — but with the craftsmanship, detail, and reliability only Formula B can offer.

Perfect for pushing a clean amp into rich breakup, tightening up a high-gain setup, or adding harmonic grit to your solos, the That Screamer 4558 is a versatile tool for any guitarist chasing vintage-flavored overdrive.

• Classic 3-knob layout — Drive, Tone, and Level for intuitive control
• True bypass switching — preserves your guitar’s natural tone when disengaged
• Hand-built in Italy — boutique quality and attention to detail
• Compact enclosure — pedalboard-friendly size