Grace Design m900 DAC/Amp

Headphone Output Power: Low Power Mode (2 Channels Driven)

• 22 mW @ 4 Ω
• 45 mW @ 8 Ω
• 90 mW @ 16 Ω
• 100 mW @ 20 Ω
• 175 mW @ 32 Ω
• 280 mW @ 50 Ω
• 83 mW @ 300 Ω
• 40 mW @ 600 Ω

Headphone Output Power: High Power Mode (2 Channels Driven)

• 240 mW @ 4 Ω
• 490 mW @ 8 Ω
• 940 mW @ 16 Ω
• 1030 mW @ 20 Ω
• 950 mW @ 32 Ω
• 650 mW @ 50 Ω
• 115 mW @ 300 Ω
• 57 mW @ 600 Ω

Impedances             

• Headphone output: 0.08 Ω 
• Line output: 47.5 Ω

THD+N at Maximum Volume

• 1kHz, 22H–22kHz BW          
• 0dBFS in, +14dBV out: k<0.002%

Intermodulation Distortion

• SMTPE/DIN 4:1 50Hz, 7kHz                    
• @1.0V out, no load: <0.008%      
• @1.0V out, 32-ohm load: <0.009%

Frequency Response

• +/-3dB          
• Fs=96kHz: 0.5-45.9kHz

Dynamic Range 

• 20Hz–22kHz bandwidth: 112dB
• 20Hz–22kHz bandwidth and A weighting filter: 115dB

Output Noise 

• 20Hz–22kHz, volume = 0-90: -106dBV      
• A-weighting filter, volume = 0-90: -109dBV      
• 20Hz–22kHz, volume = 90.5-99.5: -96dBV        
• A-weighting filter, volume = 90.5-99.5: -98dBV

Crosstalk 

• 100Hz: <107dB        
• 1kHz: <98dB
• 20kHz: <72dB

Attenuation Range

• 0 to -99dB, 0.5dB steps

Channel Tracking Accuracy

• +/-0.05dB

Maximum Output Level

• +14dBV (5.1V)

THD+N 

• 1kHz, -1dBFS, (0dBFS = +20dBu), 20Hz–22kHz bandwidth: 0.0006%                   

Dynamic Range                 

• 20Hz–22kHz bandwidth, 0dBFS = +20dBu (AES17 filter): 117dB
• 20Hz–22kHz bandwidth, 0dBFS = +20dBu (A-weighted): 119dB

Sample Rate       

• TOSLINK:    
• 44.1 kHz +/- 400 Hz
• 48 kHz +/- 700 Hz
• 88.2 kHz +/- 1200 Hz
• 96 kHz +/- 1300 Hz   
• USB:
• 44.1, 48, 88.2, 96, 176.4, 192, 352, 384 kHz
• DSD64, DSD128
• S/PDIF:
• 44.1 kHz (Lock range: 43870–45420 Hz)
• 48 kHz (Lock range: 46590–49220 Hz)
• 88.2 kHz (Lock range: 87760–90830 Hz)
• 176.4 kHz (Lock range: 93520–98430 Hz)
• 192 kHz (Lock range: 175700–181540 Hz)

Power Consumption

• Max, high-power mode: 8.0W
• Max, low-power mode: 2.5W     

Dimensions

• 4 x 5.25 x 1.8 in (10.2 x 13.3 x 2.6 cm)   

• Printed owner manual
• 6 ft (1.8 m) USB cable (gold-plated connectors, ferrite bead)
• 10 ft (3 m) USB cable (gold-plated connectors, ferrite bead)
• USB power adapter (110V or 220V, choose at checkout)