Why Shop With Us?
Free Shipping
Free Standard Ground shipping (48 contiguous states, some overweight and Used/Vintage items excluded).
Orders placed before 3 p.m. ET usually ship the same business day.
Learn More2-Year Free Warranty on Guitars
Every guitar or bass you purchase from Musician's Friend (electric or acoustic, New or Open Box) includes two years of protection from manufacturer defects.
Contact Us for DetailsWe're Here for You
Our Gear Advisers are available to guide you through your entire shopping experience. Call or Chat for expert advice and to hear the latest deals.
Contact UsContact Us
Hablamos Español
866.226.2919
Hours:
MON - FRI 6 AM – 7 PM PT
SAT 7 AM – 6 PM PT
SUN 8 AM – 5 PM PT
Grace Design m303 Fully Isolated Active Direct Box
true true
Musician's Friend Rewards
This oversized item has special shipping requirements
Grace Design m303 Fully Isolated Active Direct Box
Oops!
- Free Shipping
- Flexible Financing
- Lowest Price
Gold Coverage Protection
Protect your gear
Gold Coverage Protection
Gold Coverage goes above and beyond the manufacturer's warranty to protect your gear from unexpected breakdowns, accidental damage from handling and failures. This plan covers your product for one, two, three or up to five years from your date of purchase, costs just pennies per day and gives you a complete "no-worry" solution for protecting your investment.
Gold Coverage Includes:
- Unexpected and unintentional spills, drops and cracks
- Normal wear and tear
- Power surges
- Dust, internal heat and humidity
Other plan features include:
- For products over $200, No Lemon Policy applies. If it fails for the same defect 3 times, it is replaced on the 4th breakdown. (Does not apply to failures due to drops, spills, and cracks)
- For products under $200 experiencing the above failures, a Musician's Friend gift card will be issued for the full price of the product + tax.
- Shipping fees covered if required for repair or replacement
- Plans are transferable in the event merchandise is sold
- Plans are renewable on new gear
*Limitations and exclusions apply. See terms and conditions (Opens in new window) for program details
Term for New Gear begins on date of purchase but does not replace the store return policy or manufacturer coverage.
The Grace Design m303 delivers exceptional audio performance with its active, fully isolated design, ideal for live stage and studio applications.
The Grace Design m303 is an active direct box designed to handle the demands of both live stage and studio environments. It features galvanic isolation through a custom-wound Lundahl transformer, ensuring deep bass response and crisp high-frequency details without signal degradation. With ultralow distortion levels (below -100dB at 1kHz) and an impressively wide dynamic range (124dB), the m303 sets a new standard for direct boxes. Its rugged, extruded aluminum chassis is built to withstand heavy use, making it perfect for professional audio engineers who need reliability on the road or in the studio. The m303 also features a peak indicator LED to warn when the signal approaches clipping, along with reduced power consumption for broad compatibility with phantom-powered devices.
Features
Phantom powered active DI with full galvanic isolation.
- Custom wound Lundahl transformer, magnetically shielded with a high nickel core
- Ultralow distortion (below -100dB at 1kHz, below -80dB at 50Hz)
- Ultralow noise (-118dBu, A weighting)
- Ultrawide bandwidth 20-80kHz
- Wide dynamic range (124dB)
- Excellent low frequency headroom THD+N @50Hz <-80dB (0.007%)
- 1 mohm input impedance works with any line or pickup signal source
- Peak indicator LED - 3dB before clipping
- Power indicator LED
- Efficient design only draws 4mA of phantom power current
- Through signal connector
- Fully ESD and RFI protected
- Input pad (13dB) for high level signals
- High-quality gold contact toggle switches
- Very rugged 1/4" wall extruded aluminum chassis, recessed connectors
- Signature Grace Design transparent, musical audio performance
- Active design with true galvanic isolation
- Backed by a 5 year warranty
- Made in the USA
Experience world-class audio transparency and reliability with the Grace Design m303—ideal for both live and studio setups,
Questions & Answers
Do you have questions about this product?
- Free Standard Ground shipping (48 contiguous states, some overweight and Used/Vintage items excluded).
- Orders placed before 3 p.m. ET usually ship the same business day.
Every guitar or bass you purchase from Musician's Friend (electric or acoustic, New or Open Box) includes two years of protection from manufacturer defects.
Our Gear Advisers are available to guide you through your entire shopping experience. Call or Chat for expert advice and to hear the latest deals.
Musician's Friend Support