Links and downloads
The US-100 is a simple yet high-quality USB 2.0 audio interface perfect for people getting started with recording. It features a microphone input as well as instrument level input for direct recording guitar or bass. Stereo line inputs are provided, and can be switched to phono-level to connect a favorite turntable to digitize a vinyl collection. All of this is housed in a solid aluminum chassis to withstand daily use from the road to the dorm room.
As a 48-kHz/16-bit stereo audio interface, the US-100 connects to and is powered by a Mac or Windows computer using USB 2.0. It offers a 3.5-mm stereo headphone output and zero-latency input monitoring as well as a separate control to adjust the balance between audio input and computer sound. A free copy of Audacity software is included to start recording right away.
Main Features
- USB audio interface with two input and output channels
- 44.1/48 kHz, 16-bit resolution
- Balanced microphone input (XLR or TRS)
- Guitar input with separate connector on front panel (TRS)
- Unbalanced stereo line input (RCA), switchable to RIAA phono for direct connection of analogue turntables
- Ground terminal for turntables
- Unbalanced stereo line output (RCA)
- Headphones output (mini-jack)
- Direct monitoring function allows latency-free input monitoring
- Power supplied by USB connection – no AC adapter required
- Operates using standard Windows and Mac OS X audio drivers
- Audacity recording software included
Specifications
| Inputs and outputs | ||
|---|---|---|
| Microphone input (XLR, balanced) | XLR-3-31 (1 = GND, 2 = HOT, 3 = COLD) | |
| Input impedance | 2.2k ohm or more | |
| Nominal input level | –62 dBu to –23 dBu | |
| Maximum input level | –7 dBu | |
| Microphone input (TRS, balanced) | 6.3-mm TRS jack (Tip = HOT, Ring = COLD, Sleeve = GND) |
|
| Input impedance | 2.2k ohm or more | |
| Nominal input level | –62 dBu to –23 dBu | |
| Maximum input level | –7 dBu | |
| Line input (unbalanced) | 2 x RCA | |
| Input impedance | 10k ohm | |
| Nominal input level | –10 dBV (INPUT knob minimized) | |
| Maximum input level | +6 dBV | |
| RIAA Phono input (Line input set to PHONO) | ||
| Input impedance | 47k ohm | |
| Nominal input level | –50 dBV (INPUT knob minimized) | |
| Maximum input level | –34 dBV | |
| Guitar input | 6.3-mm jack | |
| Input impedance | 1M ohm | |
| Maximum input level | +3 dBV | |
| Line output | 2 x RCA | |
| Output impedance | 200 ohm | |
| Maximum output level | 0 dBV | |
| Headphones output | 3.5-mm stereo mini-jack | |
| Maximum output power | 15 mW + 15 mW or more (32 ohm load, THD+N 0.1% or less) |
|
| USB connector | USB B type, 4 pin | |
| Formats | USB 2.0 Hi-speed (480 Mbit/s) USB 2.0 Full-speed (12 Mbit/s, USB 1.1 equivalent) |
|
| Audio performance | ||
|---|---|---|
| Frequency response (MIC IN to OUTPUT) | 20 Hz – 20 kHz, +1/–2 dB | |
| Noise level (MIC IN to OUTPUT, when direct monitoring) | –90 dB(A) (Input 150 ohm terminated, INPUT knob minimized, BALANCE knob INPUT, OUTPUT level –10 dBFS) | |
| Total harmonic distortion (MIC IN to OUTPUT, when direct monitoring) | 0.1% or less (INPUT knob minimized, 1 kHz, –7 dBu input, Output level –10 dBFS) | |
| Sampling frequency | 44.1/48 kHz | |
| Quantization bit rate | 16-bit | |
| System requirements | ||
|---|---|---|
| Supported OS | Windows XP 32-bit/64-bit Windows Vista 32-bit/64-bit Mac OS X 10.3.9 or later |
|
| Drivers | WDM (standard Windows driver) Core Audio (standard Macintosh OS X driver) |
|
| Other specifications | ||
|---|---|---|
| Power supply | Supplied from computer by USB | |
| Power consumption | 1 W | |
| Dimensions (W x H x D) | 150 mm x 41 mm x 128 mm | |
| Weight | 0.53 kg | |
| Operating environment temperature | 5–35 ºC (41–95 ºF) | |
| Bundled software | Audacity (for Windows and Mac OS X) | |
Design and specifications subject to change without notice.