Used. Mint condition with

• Black Lion Audio Mods: Because the preamps and converters are older, some professional engineers used to send these units to companies like Black Lion Audio for internal component upgrades.

The Digidesign Digi 003 Rack (released around 2007-2008 and widely used through 2011) is a 2U rackmount FireWire audio interface. Designed as the hardware hub for Pro Tools LE, it features 4 to 8 high-quality mic preamps, extensive analog/digital I/O, and up to 24-bit/96kHz audio resolution. 

]Hardware Specifications

• Connectivity: FireWire
• Preamps: 4 discrete preamps (8 in the "Rack+" version)
• Analog I/O: 8 analog inputs (4 mic/line, 4 line) and 8 analog outputs on TRS jacks
• Digital I/O: ADAT optical I/O (8 channels) and S/PDIF (2 channels) for up to 18 simultaneous inputs
• Extras: Dual headphone outputs (with separate mixes), MIDI I/O, and Word Clock sync.

Software & CompatibilityThe 003 Rack was natively built for Pro Tools LE. It is important to note that because this is a legacy device, using it on modern computer operating systems can be challenging. 

• OS Support: It requires legacy drivers and older Mac or Windows operating systems. Modern machines (especially those using Apple Silicon or newer Windows versions) often do not support FireWire natively and may require specific Thunderbolt-to-FireWire adapter combinations. 
• DAW Support: While primarily a Pro Tools system, it can be used with other DAWs (like Reaper, Cubase, or Logic) using the provided CoreAudio (Mac) or ASIO (Windows) drivers, though setup requires some tweaking. 
• Factory Bundle: Units originally sold as the "Factory" bundle came with an iLok and a package of plugins including Bomb Factory compressors.
• The Black Lion Audio (BLA) Signature Modification for the Digidesign Digi 003 (Console or Rack) transforms the legacy FireWire interface by drastically upgrading its internal components. It yields wider stereo imaging, a more articulate frequency response, and significantly improved detail retrieval across your mixes. [1, 2, 3, 4]Key Details of the UpgradeThe upgrade is split into two primary categories: Analog and Digital. [1]Analog Upgrades:
• Premium Op-Amps: High-performance operational amplifiers are installed on all analog inputs and outputs (mic preamps, line ins/outs, and headphone jacks) to reduce noise and distortion. [1, 2]

Digital Upgrades:

• Signature Clock: A proprietary, ultra-low-jitter "Signature" internal word clock is added, resulting in more accurate A/D and D/A conversion. [1, 2]
• Converter Decoupling: Proprietary decoupling is applied to all analog-to-digital and digital-to-analog converters, resulting in a tighter, more defined low-end.

• Upgraded Capacitors: High-grade signal path capacitors replace the stock components for increased clarity and a punchier transient response. [1, 2]
• Dedicated Power Supply: A linear power supply is installed specifically for the analog-stage rails, dropping the noise floor significantly. [1]