GRACE DESIGN / m303

The GRACE DESIGN/m303 is an active DI box that delivers the transparent sound characteristic of Grace Design, thanks to its innovative power supply and custom-wound Lundahl transformers.

■ Active Direct Box

■ An active DI with next-generation sound quality.

The GRACE design m303 is an active DI (direct box) developed to achieve next-generation audio performance.

Its innovative power supply design achieves unparalleled headroom and dynamic range.

Furthermore, custom-wound Lundahl transformers contribute to high-grade bass clarity and treble detail reproduction.

The beautiful, elegant blue enclosure features a 1/4-inch thick extruded aluminum chassis, ensuring robust durability for long-term use.

This sound is authentic.

■ As a high-quality DI for live stages.

The m303 is the highest-quality DI box that FOH engineers can choose.

Its unparalleled transparency and detail reproduction keep large-scale live productions sounding amazing.

Its open, musical sound is ideal for all sources on stage, including bass, acoustic guitar, and keyboards.

Furthermore, the proven reliability of Grace Design products will satisfy venues and stage crews for extended periods.

■ As a studio DI for high-quality recording.

The m303 delivers the highest quality sound as a DI for studio recording.

It produces a vibrant sound with incredible detail, perfectly maintaining low-frequency clarity.

This allows for more effective post-processing (saturation, compression, EQ, etc.), resulting in better recordings and mixes.

It represents a new standard in high-quality DIs that musicians and engineers have been searching for.

■ Features custom-wound Lundahl transformers.

Lundahl is a world-renowned manufacturer of high-end transformers for professional audio, and the m303 was the best choice to meet the high sound standards it pursued.

The custom-wound Lundahl transformers deliver astonishing low-frequency clarity and beautiful high-frequency detail with exceptionally low-noise performance.

■ Advantages of the m303

● Transparent sound quality and musicality unique to Grace Design

● Active design with perfect galvanic isolation

● Utilizes Lundahl's globally acclaimed custom transformers

● Extremely low distortion and noise, and a wide dynamic range

● Deep, stable bass response

● 1MΩ input impedance

● Designed for long-term durability

● Made in the USA

These features give the m303 an advantage over many other DI products, making it the most reliable choice in professional audio environments.

■Main Product Specifications

● Active DI driven by phantom power

● Complete galvanic isolation

● Custom Lundahl transformer with high nickel core and magnetic shielding

● Achieves ultra-low distortion characteristics of -100dB@1kHz, -80dB@50Hz or less

● Ultra-low noise (-118dBu, A weighting)

● Ultra-wide frequency response (20-80kHz) and dynamic range (124dB)

● Excellent low-frequency headroom: THD+N @50Hz <-80dB (0.007%)

● 1MΩ input impedance: Suitable for line and pickup signals

● Peak indicator: Illuminates 3dB before clipping

● Efficient phantom power design: Current consumption is only 4mA

● Thru-out output

● Input PAD switch (13dB): Suitable for high-level signals

● Complete ESD (Electrostatic Discharge) and RFI (Radio Frequency Interference) protection

● High-quality gold-plated toggle switches

● Durable 1/4-inch thick extruded aluminum chassis and flush-mounted connectors