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
In addition to the standard included manufacturer warranty, virtually all new products carry our exclusive, industry-leading, absolutely free Sound Pure 3-Year Warranty, which includes parts and labor. It's our way of adding real value to the personal touch our small, dedicated team brings to every purchase.
Coverage exclusions live in Terms & Conditions, Section 27. Read the warranty →
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