Sound Devices usbpre - Hardware; Specifications

User Guide and
Technical Information
page 5SOUND DEVICES, LLC
Hardware
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 PC AUDIO out)
THD+N: (10 Hz - 22 kHz measurement band-
width)
0.05% max. (any input to PC recording, gain
control at min., input driven to -6 dB FS)
0.009% max. (PC AUDIO output, 0 dB FS
output, 100k ohm load)
0.05% max. (HEADPHONES output, 2 V rms
output, 600 ohm load)
E.I.N.: (MIC inputs)
-124 dBu min. (10 Hz - 22 kHz bandwidth,
150 ohm source, gain control at 50% or more,
15 dB pad out)
Clip Level
(1% THD)
Sensitivity
(typical, for 0 dB FS)
min. gain and max. gain
Impedance
(actual)
MIC
(15 dB pad out)
-12 dBu (195 mV rms) -10 dBu -53 dBu
2k ohm, active-
balanced
MIC
(15 dB pad in)
+4 dBu (1.2 V rms) +5 dBu -38 dBu
2k ohm, active-
balanced
LINE
+24 dBu (12.3 V rms) +24 dBu +7 dBu
65k ohm, active-
balanced
DI
+6 dBu (1.5 V rms) + 8dBu -9 dBu
10M ohm,
unbalanced
TAPE
+8 dBu (2.0 V rms) +10 dBu -7 dBu
110k ohm,
unbalanced
Output Clipping Levels: (1% THD, Windows
Mixer/Mac volume at max.)
PC AUDIO: +8 dBu (2.0 V rms) w/ 100k ohm
load
HEADPHONES: +11 dBu (2.75 V rms) w/
600 ohm load
Output Impedance:
PC AUDIO: 3.3k ohms
HEADPHONES: 20 ohms
S/PDIF Digital:
24-bit maximum input, 20-bit maximum
hardware output (limited to 16-bit output in
Windows Me and Mac Sound Manager),
sample rate and bit depth selected by record-
ing software and operating system
A/D Converter:
24-bit resolution - no dither added
104 dB min. dynamic range, 24-bit mode
(10 Hz - 22 kHz bandwidth, A-weighted)
96 dB min. dynamic range, 16-bit mode
(10 Hz - 22 kHz bandwidth, A-weighted)
D/A Converter:
16-bit resolution
90 dB min. dynamic range, 24 and 16-bit
mode (10 Hz - 22 kHz bandwidth,
A weighted)
Sample Rates / Bit Depths:
Recording: 8, 16, or 24-bit at 32, 44.1, 48 kHz
Playback: 8, 16-bit at 5 to 55 kHz, will play
back 24-bit sources at 16-bit
Master Clock: (recording)
PLL generated, low jitter
Metering:
Input level at A/D converter
6 segments, 30 dB total range, peak
responding
0 dB on meter = 0 dB FS (0 dB referenced to
Full Scaled Digital)
Phantom Power:
48 V through 6.8k W resistors, each mic input
will supply 10 mA
Specifications
Analog Audio Inputs: