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