Specs

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USBPre 2
High-Resolution Two-Channel Computer Audio Interface
Frequency Response (reference 1 kHz)
10 Hz - 20 kHz, +/- 0.5 dB (any input to PC
recording)
10 Hz - 20 kHz, +/- 1.0 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 dBV 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 clock-
wise, 15 dB pad out)
Input Sensitivity (typical, for 0 dBFS)
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 Clipping Level (1% THD)
Mic: -10 dBu
Mic (15 dB pad): +4 dBu
Line: +28 dBu (12.3 V rms)
Aux: +9 dBu (2.0 V rms)
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 dB FS
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
23-segment, 44 dB total range, peak
ballistics. 0 dB on meter = 0 dBFS (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 Euro-
pean Directive 89/336/EEC.
Features, nomenclature, and specifications subject to change.
© 2010, Sound Devices, LLC
Specifications
and Linux. The USBPre 2 can be used
in Stand-Alone mode as a portable
microphone preamplifier and analog-to-
digital converter.
Powered by the USB port of notebook
or desktop computers, no additional
power source is required—the computer
provides all power needed for operation.
The durable construction and compact
size of the USBPre 2 allow no-
compromise audio I/O everywhere.
Description Continued
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