推荐一个1000美刀内最厚道的usb解码器之一

punkerji · 发表于 2012-2-21 14:38:45

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Sound devices这个牌子在专业音频领域基本声音和南瓜一个级别的。
最近才发现他家新推出的才卖600美刀的Sound Devices的 usbpre 2非常给力啊, 虽说专业用途，做usb解码器是非常超值的，耳放也很给力，我试了下HD650还不错。其实这个最超值的是话放部分。
http://www.sounddevices.com/products/usbpre2.htm

punkerji · 发表于 2012-2-21 14:41:10

话放部分据说和他们家的 744T Digital Audio Recorder是一个电路

punkerji · 发表于 2012-2-21 14:42:07

usbpre2居然还可以做独立模式，这就可以脱离电脑单独做话放和解码了。

punkerji · 发表于 2012-2-21 14:44:26

技术参数比较牛逼（供参考）：

Frequency Response (reference 1 kHz, at 96 kHz Sample Rate)10 Hz - 40 kHz, ± 0.5 dB (any input to PC recording)
10 Hz - 40 kHz, ± 0.5 dB (PC source to AUX output)
THD+N (22 Hz - 22 kHz measurement bandwidth)0.05% max (any input to PC recording, gain control at min, input driven to -6 dB FS)
0.009% max (AUX output, 0 dB V output, 100 ohm load)
0.05% max (HEADPHONES output, 2 V rms output, 600 ohm load)
E.I.N. (MIC inputs)-127 dBu min (22 Hz - 22 kHz bandwidth, 150 ohm source, gain control fully clockwise, 15 dB pad out)
Input Clipping Level (1% THD)Mic: -10 dBu
Mic (15 dB pad): +4 dBu
Line: +28 dBu (19.45 V rms)
Aux: +9 dBu (2.18 V rms)
Input Sensitivity (typical, for 0 dB FS)Mic: -9 dBu min, -60 dBu max
Mic (15 dB pad): +6 dBu min, -58 dBu max
Line: +29 dBu min, +10 dBu max
Aux: +12 dBu min, -7 dBu max.
Input Impedance (actual)Mic: 4k ohm, active-balanced
Mic (15 dB pad): 4k ohm, active-balanced
Line: 60k ohm, active-balanced
Aux: 80k ohm, active-balanced
Input Limiter ThresholdMic: -4 dBFS
Low CutMic: 80 Hz, -3 dB, 12 dB per octave
Output Clipping Level (1% THD, PC-controlled output levels at max)Balanced XLR: +18 dBu with 100k ohm load
Aux: +8 dBu (2.0 V rms) with 100k ohm load
Headphones: +11 dBu (2.75 V rms) with 600 ohm load
Output ImpedanceHeadphone (Actual): 22 ohms
Balanced XLR (Line level): 500 ohms
Balanced XLR (Mic level): 5 ohms
Aux: 2k ohms
S/PDIF Digital24 or 16 bit input
A/D Converter24-bit resolution. 114 dB typical dynamic range (22 Hz - 22 kHz bandwidth, A-weighted)
D/A Converter24-bit resolution. 112 dB typical dynamic range (22 Hz - 22 kHz bandwidth, A-weighted)
Sample Rates / Bit DepthsRecording: 8, 16, or 24-bit at 8, 16, 32, 44.1, 48, 96, or 192 kHz
Playback: 24-bit at 8, 16, 32, 44.1, 48, 96, or 192 kHz
Master ClockCrystal based, low jitter
Metering48 segments, 44 dB total range, peak ballistics. 0 dB on meter = 0 dB FS (0 dB referenced to full scale digital)
Phantom Power48 V through 6.8k ohm resistors. Each mic input will supply 10 mA
PoweringUSB bus powered, soft-start meets USB hot-plugging power requirements (5 V, 100 mA max current drawn during enumeration)
5 V, 500 mA max current from USB port (USBPre 2 will not function if connected through a passive USB connection or hub)
Dimensions (unpackaged)4.3 cm x 18 cm x 10 cm (H x W x D)
1.7 in. x 7.25 in. x 4.25 in. (H x W x D)
Weight0.5 kg
1.13 lbs.
CertificationsMeets FCC Part 15 Class B
Complies with the Requirements of European Directive 89/336/EEC

[ 本帖最后由 punkerji 于 2012-2-21 14:45 编辑 ]