Detail 01
Galvanic isolation via custom-wound Lundahl transformer
Provides the unit's isolated signal path while retaining the described bass and high-frequency detail.
Product detailSKU #1500000444214
Grace Designm303 Fully Isolated Active Direct Box
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Independent shopping perspective
The Korena take
Grace Design’s m303 is an active direct box for stage and studio signal paths where galvanic isolation is required. Its custom-wound Lundahl transformer is designed to retain deep bass response and crisp high-frequency detail without degrading the signal. With distortion below -100 dB at 1 kHz and 124 dB of dynamic range, it is specified for demanding audio work. A peak LED gives a visual warning as the signal nears clipping, and the extruded aluminum chassis is built for heavy use.
Strong match
Who this is for
- Stage direct-box duties where a peak warning helps monitor signals approaching clipping.
- Studio signal paths requiring galvanic isolation through a custom-wound Lundahl transformer.
- Road and studio use that calls for an extruded aluminum chassis built for heavy use.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Distortion below -100 dB at 1 kHz; 124 dB dynamic range
Defines the m303's low-distortion, wide-dynamic-range performance.
Detail 03
Peak indicator LED
Warns when the incoming signal is approaching clipping.
Final check
Know before you order
- 01The m303 is an active direct box; its reduced power consumption is described for compatibility with phantom-powered devices.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What provides the m303's galvanic isolation?
A custom-wound Lundahl transformer provides galvanic isolation.
02How does it indicate a near-clipping signal?
A peak LED warns when the signal approaches clipping.
03Is it intended for stage or studio use?
It is designed for both live-stage and studio environments.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsPickups & controls
- Pickup Configuration
- Active
