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Grace Design M905 立体声监听控制器
发布时间：1970-01-01编辑：DanceSmile阅读（）
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m905是Grace Design第二代的立体声监听控制器，内置了各种专业需求的输入和输出接口，包括模拟和数字，同时有异步USB输入来跟电脑做同步的24bit/192kHz回放。最多可连接3对监听音箱，2对低音炮和一个监听耳机。它的遥控部分很强大又很简介，包含了耳机输出、对讲话筒和独立的实时SPL表。
m905主要特性：
模拟输入：非平衡、平衡、CUE和对讲话筒
数字输入：双AES 3、1个S/PDIF、1个TOSLINK、ADAT（4对立体声通道或SMUX模式双立体声通道）
异步的USB 2.0 USB接口，支持24bit/192kHz精度的回放
母带级别数字模拟转换器电路，带de-emphasis滤波
S-lock双段Phase Lock，极低的时钟时基偏移
LCD屏幕可显示输入、音量、输出、SPL和数字模拟转换器状态
通过内置的ECU话筒来显示的SPL表
耳机和监听音箱的音量调节精度为0.5dB
独立的单声道、衰减、静音、低音炮静音按钮
3个立体声监听输出接口，其中两个可接2.1
m905分主机和遥控器两个部分：（如下图）
技术参数：
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"
重量
Main chassis
7.8lbs
遥控器
2.2lbs