USBPre2 Specifications

Frequency 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

• Headphone (Actual): 22 ohms
• Balanced XLR (Line level): 500 ohms
• Balanced XLR (Mic level): 5 ohms
• Aux: 2k ohms