Specs:

6The Digidesign 003 Rack is a 2U FireWire-based audio interface from the late 2000s, designed for Pro Tools LE with 8 analog inputs/outputs, 4 mic preamps, ADAT, and MIDI. It provides low-latency recording at up to 96kHz, suitable for professional-grade audio in home or project studios. YouTube +2Key Features & Capabilities

• Audio I/O: 8 analog inputs (4 mic/line on back, 4 line on back) and 8 analog outputs.
• Expansion: Includes 8 channels of ADAT optical I/O and S/PDIF digital I/O, allowing up to 18 simultaneous inputs.
• Preamps: Four high-quality microphone preamps with individual gain controls and high-pass filters on the front panel.
• Monitoring: Features two independent headphone outputs with volume controls and a dedicated monitor volume knob.
• Connectivity: Uses a FireWire connection to the computer.
• Control: Includes MIDI In/Out/Thru. YouTube +2

Version Differences

• 003 Rack: Standard rackmount unit.
• 003 Rack+: Features a "Rack+" designation, which includes a front-panel DI input.
• Factory Bundle: Often included additional "Factory" plugins, such as the Bomb Factory, in addition to the standard Pro Tools LE software suite. YouTube +4

Compatibility & Use

• Software: Originally designed for Pro Tools LE, it is compatible with older Mac and PC operating systems.
• Limitations: As a FireWire device, modern computers often require FireWire-to-Thunderbolt adapters for connectivity. It is considered a legacy device.
• Use Case: Ideal for producers needing a stable, rack-mountable interface with extensive I/O for older, dedicated Pro Tools workstation.
  
  Some scratches as shown in picture. Works with no issues.