Pro Tools 101_ An Introduction to Pro Tools 11 ( PDFDrive )

stereo balanced XLR outputs as well as dedicated ¼-inch outputs. Also
included are a mic input, two ¼-inch line-level inputs, AES/EBU and
S/PDIF digital I/O, and MIDI I/O. Eleven Rack communicates with Pro
Tools via a high-speed USB 2.0 connection.
Figure 1.18 Eleven Rack audio interface
Source: Avid ® .
The 003 Family (Discontinued)
The 003 family consists of the 003, the 003 Rack, and the 003 Rack+
FireWire-enabled interfaces. All three units provide up to 18 channels of
simultaneous I/O. The 003 provides I/O by way of an integrated control
surface with eight motorized, touch-sensitive faders in a portable 8×4×2
digital mixer. The 003 Rack and 003 Rack+ each provide the same I/O
functionality in a rack-mounted unit, with the 003 Rack+ providing additional
mic preamps built into the interface. All units provide 24-bit, 96-kHz audio
and include eight analog inputs, four mic preamps (eight on the 003 Rack+),
eight channels of ADAT optical I/O, and two channels of S/PDIF digital I/O.
Figure 1.19 003 audio interface