The US-125M from Tascam is an USB audio interface that also incorporates mixer functionality. The unit is capable of combining a microphone, instrument and a line source with a computer audio signal, and feeding the mix to a computer via USB.
The unit features level controls for all four sources and an output level control, along with signal and overload indicators. The microphone input has a switchable limiter. The USB-powered device is housed in a solid aluminum case, and can also be used as a simple stand-alone mixer.
| ADC | 16-bit |
| DAC | 16-bit |
| Sample Rates | 32, 44.1 and 48kHz |
| Inputs |
1 x XLR Microphone (rear) 1 x 1/4" TRS phone Microphone (rear) 1 x 1/8" TRS stereo mini Microphone (front) 1 x 1/4" TS phone Instrument (rear) 2 x RCA phono Line (rear) |
| Input Impedance |
Microphone (all): 2.2kΩ Instrument: 1MΩ Line: 10kΩ |
| Nominal Input Level |
Microphone (all): -64dBu to -44dBu, +/-3.0dB Line: -15dBV, +/-2.0dB |
| Maximum Input Level |
Microphone (all): +28dBu, +/-3.0dB Instrument: +6dBV, +/-2.0dB (2.0V) Line: +21dBV, +/-2.0dB |
| Outputs |
2 x RCA phono Line 1 x 1/8" TRS stereo mini Headphone |
| Output Impedance | Line: 200Ω |
| Maximum Output Level |
Line: +3dBV, +/-2.0dB (+1.41Vrms) Headphone: 15mW + 15mW (with 32Ω connection) |
| Other Connectors | USB 2.0 Type B, 4-pin (supports USB 1.1) |
| Frequency Response | 20Hz to 20kHz, +/-2.0dB (Mic->Line, Line->Line, Inst->Line, PC->Line) |
| Distortion |
Interface: Less than 0.1% (during direct monitoring, 1kHz, Mic In->Line Out) ADC: 0.01% DAC: 0.005% |
| Dynamic Range |
ADC: 89dB DAC: 93dB |
| S/N Ratio |
ADC: 89dB DAC: 96dB |
| Channel Separation |
ADC: 65dB DAC: 92dB |
| Operating Temperature | 41 to 95°F (5 to 35°C) |
| Power Requirements | USB bus (1W consumption) |
| System Requirements |
Mac OS X 10.3 or better Core Audio driver PC Windows XP, Vista, Windows 7 WDM driver |
| Dimensions (WxDxH) | 5.9 x 4.8 x 1.7" (150 x 122 x 42mm) |
| Weight | 17.6 oz (500g) |