The McGrath Tilt EQ

The McGrath Tilt EQ is an onboard active preamp and buffer engineered to streamline bass tone control. Re-imagined from studio utility hardware and adapted for active bass cavities, the Tilt EQ replaces multi-knob layouts with an intuitive, single-knob tone shaper that protects dynamic range and frequency integrity. Core Concept & Circuit Pedigree DOD FX10 Inspiration: The circuit traces back to a concept suggested by Keith Duffy (bassist for The Corrs). Duffy wanted the tone-shaping power of the 1980s DOD FX10 Bi-FET Preamp—a studio secret weapon famously used by Max Martin to punch up 1990s pop productions—rebuilt directly into a bass control cavity. No-Loss Passive Protection: Functions as a low-impedance active buffer right at the source. It protects high-end clarity and low-end punch against signal loss, cable capacitance, and long pedalboard runs, even when set to its center neutral detent. Single-Knob Frequency Response: Unlike standard tilt EQs that slice out low end when boosting top end, the McGrath Tilt EQ is voiced specifically for bass. Clockwise (Treble Tilt): Boosts upper-mid articulation, finger attack, and slap clarity while keeping the low-end fundamental completely intact. Counterclockwise (Bass Tilt): Thickens the low end with immediate vintage warmth, transforming the bass into a sub-bass powerhouse when fully open. Hardware Specs & Engineering Updates Center Detent Potentiometer: Features a mechanical detent at 12 o'clock for an instant return to a flat baseline. Internal Master Gain Trimpot: Overall circuit gain is set via an onboard PCB trimpot, freeing up cavity space while letting players match output levels between active and passive modes. Easy-Connect Terminals: Built with PCB screw terminal blocks for quick, solderless installations during pickups or preamp swaps. Dual-Voltage Operation: Runs on either a standard 9V battery or 18V for maximum clean headroom. Compact Footprint: Miniaturized PCB design drops into tight control cavities (including standard P-Bass and J-Bass routes) without requiring wood removal. Media Reviews & Coverage Bass Magazine Feature Article Highlighting how the Tilt EQ re-engineers a classic studio utility pedal for modern bass players. Focuses on Keith Duffy's initial brainstorm, the maxing-out problem of 3-band EQs, and how the Tilt EQ preserves low-end tightness even when boosting high-end clarity. The Bass Channel YouTube Review Comprehensive hands-on demonstration featuring a 32" medium-scale J-Style Thunderhorse V in Vice City finish. Showcases how the single-knob Tilt EQ works alongside the 12-Way Rotary Pickup Selector, proving how quick it is to dial in studio-ready tones direct-to-desk without wrestling with stacked pots or dead frequencies.