Headphone AKG K701 Open-Back Kit with Grace M900 Headphone Amp

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AKG K701 Open-Back Reference Stereo Headphones Specs

Headphone
Maximum Power Handling 200 mW
Foldable No
Audio Connector to Source 1/8" / 3.5 mm TRS
Connector Plating Gold
Adapter (Included) 1/4"

 

Grace Design M900 Compact, Portable Headphone Amp, DAC, And Preamp Specs

Headphone
Connectors Inputs
Digital Inputs: S/PDIF and TOSLINK
USB Power: Micro-USB 5 V, 2 A (high power input)
USB Data: Micro-USB 2.0 (for data, signal, bus power input)

Output
Stereo Line Outputs: RCA (L/R)
Headphone: 2 x 1/4" / 6.35 mm
Display 7-segment LED
THD + N THD+N 1 kHz, 22 Hz - 22 kHz BW
@1.0 V Out, No Load: <0.002%
@1.0 V Out, 32 Ohms Load: <0.010%
Intermodulation Distortion Intermodulation Distortion SMTPE/DIN 4:1 50 Hz, 7 kHz
@1.0 V Out, No Load: <0.008%
@1.0 V Out, 32 Ohms load: <0.009%
Frequency Response ± 3dB Fs=96 kHz: 0.5 Hz to 45.9 kHz
Dynamic Range 20 Hz to 22 kHz Bandwidth: 112 dB
20 Hz to 22 kHz Bandwidth and A-Weighting Filter: 115 dB
Output Noise 20 Hz to 22 kHz, Volume = 0-90: -106 dBV
A-Weighting Filter, Volume = 0-90: -109 dBV
20 Hz to 22 kHz, Volume = 90.5-99.5: -96 dBV
A-Weighting Filter, Volume = 90.5-99.5: -98 dBV
Crosstalk 100 Hz: <107 dB
1 kHz: <98 dB
20 kHz: <72 dB
Attenuation Attenuation Range: 0 to -99 dB, 0.5 dB steps
Accuracy Channel Tracking Accuracy: ±0.05 dB
Maximum Output Level Maximum Output Level, No load
Low Power Mode: +14.1 dBV (5.1 V)
High Power Mode: +15.5 dBV (6.0 V)
Impedance Headphone Output: 0.08 Ohms
Line Output: 47.5 Ohms
Lock Range S/PDIF
44.1 kHz: 43870-45420 Hz
48 kHz: 46590-49220 Hz
88.2 kHz: 87760-90830 Hz
96 kHz: 93520-98430 Hz
176.4 kHz: 175700-181640 Hz
192 kHz: 187050-196380 Hz

TOSLINK
44.1 kHz: 43900-45410 Hz
48 kHz: 46590-49190 Hz
88.2 kHz: 87840-90830 Hz
96 kHz: 93520-97530 Hz

USB Supported Sample Rates: 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz
Power Consumption Max, High Power Mode: 8.0 W
Max, Low Power Mode: 2.5 W
Power Mode Headphone Output Power
Low Power Mode

 

1 Channel Driven
4 Ohms: 80 mW
8 Ohms: 140 mW
16 Ohms: 310 mW
20 Ohms: 350 mW
32 Ohms: 600 mW
50 Ohms: 560 mW
300 Ohms: 83 mW
600 Ohms: 40 mW

2-Channels Driven
4 Ohms: 22 mW
8 Ohms: 45 mW
16 Ohms: 90 mW
20 Ohms: 100 mW
32 Ohms: 175 mW
50 Ohms: 280 mW
300 Ohms: 83 mW
600 Ohms: 40 mW

High Power Mode

1 Channel Driven
4 Ohms: 925 mW
8 Ohms: 1800 mW
16 Ohms: 1900 mW
20 Ohms: 1575 mW
32 Ohms: 1020 mW
50 Ohms: 680 mW
300 Ohms: 115 mW
600 Ohms: 57 mW

2-Channels Driven
4 Ohms: 240 mW
8 Ohms: 490 mW
16 Ohms: 940 mW
20 Ohms: 1030 mW
32 Ohms: 950 mW
50 Ohms: 650 mW
300 Ohms: 115 mW
600 Ohms: 57 mW

Dimensions 4.0 x 5.3 x 1.8" / 101.6 x 133.4 x 45.7 mm

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