Grace Design
m303
Best high fidelity monitoring for professional audio engineers.
This professional-grade direct box is engineered for exceptional audio clarity and signal integrity. It converts unbalanced instrument signals to balanced line-level signals, ideal for connecting guitars, basses, and keyboards to mixing consoles or PA systems. Its robust aluminum housing ensures durability in demanding environments. Designed for professional audio applications, it offers reliable performance and clean signal transmission, making it a staple for live sound engineers and studio professionals seeking pristine audio quality. It is powered via phantom power, simplifying setup and reducing cable clutter.
$269.00
Owner Satisfaction
4.7
/ 5
Category Rank
34
/ 183
#34 in Direct Boxes
Price vs Category Average
-11%
Below average
DI Box Type
Active
/ Active
Who it's for
- Audio engineers and producers demanding transparent monitoring
- Studio professionals seeking an all-in-one monitoring solution
- Mastering engineers and studios requiring long-term reliability
Who should skip it
- Home studio owners with budget constraints
- Beginners or casual users needing simple monitor control
- Producers working in space-constrained home studios
Performance breakdown
Signal Fidelity
Grace Design circuitry delivers unmatched transparency for critical studio tracking.
Build Durability
Rugged aluminum housing withstands the rigors of constant touring and stage use.
Setup Simplicity
Phantom power operation eliminates the need for external batteries or power supplies.
Input Versatility
Handles guitars, basses, and keyboards with clean, consistent signal conversion.
Monitoring Utility
The 1/4 inch Thru output makes stage monitoring seamless and reliable.
Noise Floor
Exceptionally quiet operation ensures your signal remains pristine and artifact-free.
Key Specs
DI Box Type
Active
Signal Type
Mono
Power Source
Phantom Power
Housing Material
Aluminum
Output Connector Type
1/4 inch TS Thru
Rack Mountable
False
Phantom Power Compatible
True
Know before you buy
No, the m303 is powered entirely by phantom power from your mixing console or audio interface. This eliminates the need for batteries or external power adapters, keeping your setup clean and simple.
Yes. While it is built with the pristine signal integrity required for studio recording, its robust aluminum housing is specifically designed to withstand the rigors of touring and live sound environments.
Absolutely. The unit features a 1/4-inch TS Thru output, which allows you to send your instrument signal to your stage amplifier or monitor while simultaneously sending a balanced signal to the house PA system.
The m303 is an active direct box. This design is ideal for instruments with passive pickups, as it provides the necessary impedance buffering to ensure you don't lose high-end detail or signal strength over long cable runs.
No, the m303 is designed as a standalone, portable unit and is not compatible with rack-mounting systems.
Still have a question?
Ask Hayley anything about this product before you decide.