Can someone watch this can tell me if it is the same as the MixPre but with extra features like digital out etc...?
So it can be used as a preamp/AD for a PCM-D50?
http://www.sounddevices.com/products/usbpre2.htm
If you read the link that you just posted, yes, in theory at least. Compared to the Mixpre there are other non-vital differences though (2 vs. 3 XLR inputs with ability to mix down etc.)
"Stand-Alone Operation
The USBPre 2 can be used in Stand-Alone mode where it operates as a high-quality, portable microphone preamplifier and analog-to-digital converter. Digital signals connected to the USBPre 2 are converted to analog and available at the headphone, XLR, and RCA outputs. Stand-Alone operation requires the unit to be connected to a USB power source. Stand-Alone mode is a great option when an additional microphone preamplifer, A-D converter, or D-A converter is required."
You'd just have to pick up an external USB battery like Tekkeon. Remains to be seen how much running time you'd get if you want P48.
This is actually pretty exciting news. The original USBpre didn't support standalone use, IIRC.
The only weird thing as I see it, is the inclusion of toslink digital jacks, but no coax?!
This narrows down the use with field recorders with 24bit and optical input to almost none.
D50 is pretty much the only one I know with the right specs.
Note that the D50 is known to be very fickle about the optical signal it's being fed. It's
not compatible with UA-5 (use the search for the full story), and it remains to be seen if it actually plays nicely with USBpre 2.
Then there is the H120 and the JB3, but they're 16bit and getting antiquated...
Another interesting question is wether it supports analog pass-through, or if the signal goes through A/D/A conversion?
No MSRP posted yet.
It's being presented at the IBC this week. If anyone happens to be in Amsterdam, go there and quiz the SD crew:
http://www.sounddevices.com/news/usbpre-2Frequency 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 Threshold
Mic: -4 dBFS
Low Cut
Mic: 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 Impedance
Balanced XLR (Line level): 500 ohms
Balanced XLR (Mic level): 5 ohms
Aux: 2k ohms
S/PDIF Digital
24 or 16 bit input
A/D Converter
24-bit resolution. 114 dB typical dynamic range (22 Hz - 22 kHz bandwidth, A-weighted)
D/A Converter
24-bit resolution. 112 dB typical dynamic range (22 Hz - 22 kHz bandwidth, A-weighted)
Sample Rates / Bit Depths
Recording: 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 Clock
Crystal based, low jitter
Metering
48 segments, 44 dB total range, peak ballistics. 0 dB on meter = 0 dB FS (0 dB referenced to full scale digital)
Phantom Power
48 V through 6.8k ohm resistors. Each mic input will supply 10 mA
Powering
USB 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)
Weight
0.5 kg
1.13 lbs.
Certifications
Meets FCC Part 15 Class B
Complies with the Requirements of European Directive 89/336/EEC