M-Audio Delta 1010

Here's another interface that I acquired on a whim, only to realize that it requires a d-sub (25 pin) card to function. Apparently it has to be connected to your PC/Mac to even turn on (it's not bus-powered, though) 
For that reason, I was unable to properly test it. I did, however, check over the circuit and cleaned the contacts/jacks.
The filter capacitor was a bit bloated, so I replaced it. Otherwise, everything appears to be in excellent shape. It should operate properly if you have everything connected.
Utilizes a 9V (3A) AC adapter, which is not included.
I really have no further knowledge of this unit (hopefully you do if you've read this far)
At one point in time, these were ubiquitous in small-studios - and I know that a lot of people swear by them. 

The manual is available online, here's the brief details: 

• 10-input, 10-output recording interface
• +4dB or -10dB operation (operating levels are individually selectable for each channel)
• -Supports up to 24-bit, 96kHz operation
• Sturdy rack-mounted I/O interface
• Eight balanced/unbalanced analog inputs and outputs on 1/4” connectors with MIDI, Word Clock, and S/PDIF inputs and outputs
• Balanced or unbalanced operation
• High dynamic range: D/A 114dB, A/D 109dB (A-weighted)
• Low distortion (measured THD @ 0dBFS): A/D 0.001%, D/A 0.0015%.
• All data paths support up to 24bit/96kHz performance.
• Control Panel software for mixing, routing, and monitoring capabilities
• Sample-accurate hardware sync allows linking of up to four Delta 1010 interfaces in one computer