Some scrapes on the case from use. Everything works, has the usual power jumper mod that most of these units have, so just plug in and go. Includes Symphony expansion card.

Introduction from the manual:

The AD-16X, Apogee’s latest and most advanced analog to digital converter, takes the legendary quality of

Apogee a significant step forward. Features such as a redesigned power supply, standard 192kHz sampling rates,

the C777 clocking technology found in Big Ben, and optional Pro Tools HD and FireWire expansion cards, make

the AD-16X the most powerful and flexible A-to-D converter ever.

Advanced High-Definition Conversion

With up to 192k standard sample rates, the AD-16X combines Apogee’s legendary conversion quality with

the very latest in high-definition digital to provide unrivaled flexibility and quality.

C777 Clocking used by Big Ben

The AD-16X uses Apogee’s C777 clocking technology. Famous for keeping Big Ben on time, the C777

utilizes an entirely digital process that Apogee has developed with the most advanced Direct Digital

Synthesis (DDS) technology and DSP-based digital filtering. With a stable, crystal based digital PLL

handling the clocking, the AD-16X is able to intelligently manipulate incoming signals and adapt to them

accordingly, resulting in unprecedented jitter attenuation and an astonishing and noticeable difference in

sound quality.

Advanced Option Routing

With version 2 firmware, both digital inputs and analog outputs may be routed in conjunction with an

installed X-Option card. Please see page 7 for details.

Universal Connectivity

With it’s wide array of standard and optional digital outputs, the AD-16X can be connected to virtually any

digital system. The AD-16X includes AES and ADAT Optical digital outputs as standard, while either the

X-HD or X-FireWire cards may be installed for connectivity to Pro Tools HD or any FireWire equipped

computer.

SoftLimit

Soft Limit is an analog peak limiter that instantaneously and gracefully controls transient peaks,

thereby allowing an additional 4-6 dB of headroom. Short of purchasing a very expensive stand-alone

compressor/limiter, there is currently no product on the market that handles this process better than

SoftLimit.

UV22HR

UV22HR is Apogee´s industry standard technology for reducing the word-length of a high-resolution digital

signal to 16 bits. UV22HR is also being employed to produce dramatically improved internet and computer

audio content without increased file sizes or data rates. It is estimated that 8 out of 10 hit records are

mastered using Apogee’s UV22HR technology.