As your needs grow or change, you can easily add more analog inputs, analog outputs, or digital I/O by installing an option card. You can install one option card in HD I/O 8x8x8 and up to two in HD I/O 16x16 Digital. While HD I/O 16x16 Analog comes with the maximum four cards, you can customize your I/O by swapping out any card.
The HD I/O Analog In card contains connectors for analog audio input with 24-bit, 192 kHz A/D converters. Input is provided through two discrete DB–25 connectors (one for +4 dBu sources, and the other for –10 dBV sources). You can connect sources at both operating levels and choose between them from within Pro Tools.
+4 dBu Balanced Provides eight balanced input channels at +4 dBu nominal operating levels.
–10 dBV Balanced Provides eight balanced input channels at –10 dBV nominal operating levels.
The Input Trims below the DB–25 connectors are used to individually calibrate each channel’s