The Mesa Boogie Rosette Acoustic DI Preamp is a professional-grade, studio-console-derived preamp and direct box designed specifically for acoustic instruments. [1, 2]Core Design & Audio Path

• Console Heritage: Uses front-end and EQ circuitry adapted from the Rosette 300 Two:Eight amplifier, minus the mic input, for ultra-low noise and pure signal fidelity.
• Input Stage: Features a high-impedance, current source-biased FET input to handle a wide range of active and passive acoustic pickups. [1, 2, 3]

EQ & Tone Shaping

• 4-Band Active EQ: Includes fixed Bass and Treble shelving controls alongside two fully active, sweepable midrange bands (Low-Mid and High-Mid) for precise frequency cutting or boosting. [1, 2]
• Feedback & Rumble Control: Equipped with a sweepable Notch Filter (40Hz–500Hz) to eliminate onstage feedback and a variable High-Pass Filter (40Hz–200Hz) to clear out low-end sub-harmonic rumble. [1, 2, 3]
• Phase Switch: Top-mounted phase control to optimize resonance and manage phase cancellation. [1, 2]

Performance & Connectivity Features

• Footswitches: Dual remote footswitches for a variable Solo/Boost level control and a Mute function tied to a silent tuner output.
• I/O & Outputs: Offers an effects loop, an unbalanced 1/4" line-level preamp output, and versatile balanced XLR direct outputs with pre/post-EQ switching and ground lifts. [1, 2, 3, 4]