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Grace Design M905 立體聲控制器詳細(xì)介紹



m905是Grace Design第二代的立體聲監(jiān)聽控制器，內(nèi)置了各種需求的輸入和輸出接口，包括模擬和數(shù)字，同時有異步USB輸入來跟電腦做同步的24bit/192kHz回放。***多可連接3對監(jiān)聽音箱，2對低音炮和一個監(jiān)聽耳機(jī)。它的遙控部分很強(qiáng)大又很簡介，包含了耳機(jī)輸出、對講話筒和立的實時SPL表。m905主要特性：?模擬輸入：非平衡、平衡、CUE和對講話筒?數(shù)字輸入：雙AES 3、1個S/PDIF、1個TOSLINK、ADAT（4對立體聲通道或SMUX模式雙立體聲通道）?異步的USB 2.0 USB接口，支持24bit/192kHz精度的回放?母帶級別數(shù)字模擬轉(zhuǎn)換器電路，帶de-emphasis濾波?S-lock雙段Phase Lock，極低的時鐘時基偏移?LCD屏幕可顯示輸入、音量、輸出、SPL和數(shù)字模擬轉(zhuǎn)換器狀態(tài)?通過內(nèi)置的ECU話筒來顯示的SPL表?耳機(jī)和監(jiān)聽音箱的音量調(diào)節(jié)精度為0.5dB?立的單聲道、衰減、靜音、低音炮靜音按鈕?3個立體聲監(jiān)聽輸出接口，其中兩個可接2.1 m905分主機(jī)和遙控器兩個部分：（如下圖）
技術(shù)參數(shù)：
ANALOG I/O
THD+N at Maximum Volume, 1kHz, 22Hz-22kHz BW
+20dBu out <0.0008%
+10dBu out <0.0008%
0dBu out <0.002%


Intermodulation Distortion SMTPE/DIN 4:1 50Hz, 7kHz
@+20dBu out <0.002%
@ 0dBu out <0.0015%


Frequency Response
Balanced Inputs +/-3dB 3Hz to 1.25MHz
Unbalanced Input +/-3dB 3Hz to 275kHz


Dynamic Range
20-22kHz bandwidth 118dB
20-22kHz bandwidth and A weighting filter 121dB


Output Noise
20-22kHz bandwidth, at -20dB gain -99dBu
20-22kHz bandwidth and A weighting filter, at -20dB Gain -102dBu


Phase Deviation
20Hz to 20kHz <10 degrees
10Hz to 100kHz < 19 degrees


Crosstalk any channel
100Hz <104dB
1kHz <100dB
20kHz <79dB


Balanced Input CMRR
60Hz >90dB
1kHz >85dB
10kHz >70dB


Gain Range -104dB to +13dB


Channel Tracking Accuracy
Any channel +/-0.1dB


Maximum Output Level +26dBu


Maximum Input Level
Balanced inputs +29dBu
Unbalanced inputs +21dBu


Impedances
Balanced inputs 88k Ohms
Unbalanced inputs 53k Ohms
Balanced outputs 300 Ohms
Minimum load impedance 300 Ohms


External Talkback Mic Preamp Gain +7dB to +70dB in 1dB steps




DIGITAL TO ANALOG CONVERTER FIXED OUTPUTS
Output Levels
User selectable (0dBFS) -76dBu to +24dBu in 0.5dB steps
Fixed output trim range (0.5dB steps)


THD+N
1kHz, -1dBFS, (0dBFS = +20dBu), 20-22kHz bandwidth 0.0006%


Dynamic Range
20-22kHz bandwidth, 0dBFS = +20dBu (AES17 filter) 117dB
20-22kHz bandwidth, 0dBFS = +20dBu (A-weighted) 119dB


Input Lock Range
AES3/SPDIF 44.1kHz +/-400Hz
48kHz +/-700Hz
88.2kHz +/-1200Hz
96kHz +/-1300Hz
176.4kHz +/-2000Hz
192kHz +/-2000Hz
TOSLINK 44.1kHz +/-400Hz
48kHz +/-700Hz
88.2kHz +/-1200Hz
96kHz +/-1300Hz
ADAT LIGHTPIPE?
8 Channels at 44.1kHz and 48kHz
4 Channels at 88.2kHz and 96kHz (s/mux) 44.1kHz +/-50Hz
48kHz +/-70Hz
88.2kHz +/-50Hz
96kHz +/-70Hz
USB Supported Sample Rates 44.1, 48, 88.2, 96, 176.4, 192kHz, DSD64 2.8224MHz, DSD128 5.6448MHz


s-Lock? Capture Range
44.1kHz +/- 6Hz
48kHz +/- 7Hz
88.2kHz +/- 14Hz
96kHz +/- 20Hz
176.4kHz +/- 24Hz
192kHz +/- 30Hz


Word Clock / Superclock Input
Impedance (switchable) 75 ohm / 1Meg ohm
Minimum Voltage 3V peak to peak
Maximum Voltage 5V peak to peak
Word clock frequencies supported 44.1, 48, 88.2, 96, 176.4, 192kHz
Superclock frequencies supported N/A


POWER SUPPLY / GENERAL
Power consumption 60W
Input Voltage 50-60Hz 100VAC – 240VAC


Dimensions
Main chassis IEC 2U 3.5" x 10.5" x 17"
Remote control unit 8.9" x 5.1" x 2.2"


Weight
Main chassis 7.8lbs
Remote control unit 2.2lbs

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