M-AUDIO Duo USB - Manual (Page 26)

Soundcards, Ethernet adapters embedded on the motherboard, or connected via USB,
ISA, or PCI. How many PCI/ISA slots do you have and are you using any USB hubs? 3.
Are you recording to IDE or SCSI hard drives?
These are extremely important pieces of information to know when calling us.
Finally, Mac users using OS X must know what their System Administrator Password is.
Symptoms:
Please be ready to describe the symptoms to the best of your abilities
(crackle, stuck notes, jitter, etc.) and whether or not they are consistent (Do they
happen at the same place at the same time —each time? Etc.). You may also want
to note when you started experiencing these problems and whether it was related
to any specific incident or not.
After gathering this information, please have your telephone near your computer
and/or Midiman/M-Audio product. If you’re calling from a cell phone, please
prepare plenty of battery power as well as make sure that a cellular signal can be
clearly reached where you are calling from. Sit back, try to relax and then dial.
Our top-notch technical support team will be ready to help you fix your problems.
Thank you for using Midiman/M-Audio products.
Appendix A - Technical Specifications
Analog Audio
Maximum Input - Mic In: 16 dBV
Headroom: 26 dB
Maximum Gain - Mic. In: 60 dB
Input Impedance (1 kHz) - Mic In: 2.4 kOhms
Input Impedance (1 kHz) - Line In: 10 kOhms
Peak Analog Input Signal (Line In): +19.0dBu (+4dBu setting),
+2.1dBV (-10dBV setting)
Peak Analog Output Signal (Line Out): +20.0dBu (+4dBu setting),
+2.0dBV (-10dBV setting)
Dynamic Range:
Line In to Line Out: 105dB (A-weighted),
Mic In to Line Out: 107dB (A-weighted)
THD + N (at -10dBFS):
Line In to Line Out: less than 0.002%,
Mic In to Line Out: less than 0.002%
Frequency Response: 22Hz - 22kHz, -0.3,-0.2dB
Input Impedance (Line In): 1M ohms minimum
Line Input Connectors: 1/4" female TS-type, unbalanced
Line Output Connectors: 1/4" female TRS-type, balanced or
unbalanced
Digital Audio
Digital Output Format: S/PDIF coaxial, 0.5V peak-to-peak;
Digital Output Sample Rate: 44.1kHz to 96kHz.
Power Supply: 9V AC 1 Amp; 2.5mm plug.
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