GRACE DESIGN / m308

<> The GRACE design m308 is an 8-channel, 1U rack-mountable active DI box. Its galvanic isolation design provides low noise and next-generation audio performance in any stage and studio environment.

■Specifications

・Gain

Pad OFF (13.6kΩ load): -6dB, Pad ON (13.6kΩ load): -19dB

・Frequency Response

±0.2dB (50Ω source, 13.6kΩ load): 82Hz - 27kHz

±3dB (50Ω source, 13.6kΩ load): 20Hz - 80kHz

・Built-in High-Pass Filter

2nd-order Bessel filter: -3dB @ 20Hz

・Total Harmonic Distortion + Noise (THD+N) ※20Hz-20kHz bandwidth

-10dBu output, 1kHz: -102.8dB (0.00072%)

-10dBu output, 50Hz: -83dB (0.0073%)

-10dBu output, 25Hz (10Hz-20kHz bandwidth): -72dB (0.023%)

* Intermodulation Distortion (at -10dBu output)

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 unconnected (equivalent to 330pF source): -112.3dBu

Pad ON, 50Ω source: -113.1dBu

Pad ON, input unconnected (equivalent to 330pF source): -113.0dBu

* Noise - Output Level A-weighted (Noise Output Level A-weighted)

Pad OFF, 50Ω source: -118.6dBu

Pad OFF, input unconnected (equivalent to 330pF source): -114.9dBu

Pad ON, 50Ω source: -115.5dBu

Pad ON, input unconnected (equivalent to 330pF source): -115.2dBu

* Phase Deviation

<10° (97Hz - 7.5kHz)

* Maximum Input Level (0.1% THD+N)

1kHz, pad OFF: 14dBu, 1kHz, pad ON: 27dBu

* Maximum Output Level (0.1% THD+N)

Balanced, 1kHz, 13.6kΩ load: 8dBu, Balanced, 1kHz, 3.65kΩ load: 7.3dBu

* Impedance

Input (Pad OFF): 1MΩ, Input (Pad ON): 115kΩ, Output: 330Ω

* Power Supply

48V Phantom Power (IEC 61938 compliant), Maximum 4mA

* Weight

1,817g

* Dimensions

165mm(D) x 483mm(W) x 44mm(H)

* This unit is for 48V phantom power only.