From Grace Design
The all-new m303s is an active, truly-isolated stereo direct box, delivering next-generation audio performance for all live stage and studio applications. Our advanced power supply design provides incredible headroom and dynamic range. Custom-wound Lundahl transformers output amazing low-end clarity and high frequency detail. All of this performance is packaged in beautiful and rugged ¼” extruded aluminum chassis. Don’t let the elegant exterior fool you, these things are built.
Features:
- Stereo version of the m303
- Unmatched transparent, musical audio performance
- Massive headroom - handles a wide array of signal levels coming off the stage
- Incredibly low distortion and noise
- Active design with true galvanic isolation - NO NOISE
- 2x world-class Lundahl output transformers
- Deep, rock-solid bass response
- 1M Ohm input impedance, perfect for passive pickups
- Designed and built for years of reliability
- Backed by a 5 year warranty
- Made in the USA
|
m303s Specifications |
|
| Gain | |
| Pad Off, 13.6k Ohm load | -6dB |
| Pad On, 13.6k Ohm load | -19dB |
| Frequency Response | |
| ± 0.2dB (50Ω source, 13.6k load) | 82Hz-27kHz |
| ± 3dB (50Ω source, 13.6k load) | 20Hz-80kHz |
| THD+N 20Hz-20kHz BW | |
| -10dBu out, 1kHz | -102.8dB (0.00072%) |
| -10dBu out, 50Hz | -83dB (0.0073%) |
| -10dBu out, 25Hz (10Hz-20kHz BW) | -72dB (0.023%) |
| High Pass Filter | |
| 2nd Order, Bessel | -3dB 20Hz |
| Intermodulation Distortion -10dBu Out | |
| SMPTE/DIN 1:1 (50Hz, 7kHz) | -106dB (0.0005%) |
| SMPTE/DIN 4:1 (50Hz, 7kHz) | -99dB (0.0010%) |
| Noise – Output Level 20Hz-20kHz | |
| Pad Off, 50Ω source | -116.2dBu |
| Pad Off, Input disconnected (equivalent to 330pF source) | -112.3dBu |
| Pad On, 50Ω source | -113.1dBu |
| Pad On, Input disconnected (equivalent to 330pF source) | -113d.0Bu |
| Noise – Output Level A-weighted | |
| Pad Off, 50Ω source | -118.6dBu |
| Pad Off, Input disconnected (equivalent to 330pF source) | -114.9dBu |
| Pad On, 50Ω source | -115.5dBu |
| Pad On, Input disconnected (equivalent to 330pF source) | -115.2dBu |
| Maximum Input Level (0.1% THD+N) | |
| 1kHz, Pad Off | 14dBu |
| 1kHz, Pad On | |
| Maximum Output Level (0.1% THD+N) | |
| Balanced, 1kHz, 13.6kΩ Load | 8dBu |
| Balanced, 1kHz, 3.65kΩ Load | |
| Impedance | |
| Input Pad Off | 1MΩ |
| Input Pad On | 115kΩ |
| Output | |
| Power Supply | |
| 48V Phantom Power, IEC 61938 | |
| Weight and Dimensions | |
| 1.05lb, (0.48kg) - 5.30”L x 3.19”W x 1.73”H (134mmL x 81mmW x 44mmH) | |
Free 3-Year Warranty
Sound Pure stands behind our products. Free three-year warranty on this item. Coverage exclusions live in Terms & Conditions, Section 27.
Level of support and expertise that simply isn't available at big-box megastores. Read the warranty →
Returns
This item is not eligible for the Try-Before-You-Buy 48-hour audition. Standard return policy applies — see Terms & Conditions, Section 18 for details.
You may also like
Browse Direct Boxes →
Sound Pure Studios · Durham, NC
Come hear it in our control rooms.
Sound Pure is a working studio in Durham, NC — a 1,000 sq ft live room and two pro control rooms. Book a session to audition gear in a world-class acoustic space before you buy.