Benchmark Media Systems DAC 1 USB One owner, excellent condition

I am the original owner and have had this in my main system up until the last few years.  As you may know, the Benchmark DAC 1 USB is one of the top rated DAC's with USB capability and excellent design to reduce jitter to levels below audibility.
Build quality is incedible and you will not be disappointed using this DAC for many years.  described as follows:

A Stellar D-A Converter!

The Benchmark DAC1 USB digital-to-analog converter adds another level of performance to an already world-beating product, the DAC1! Adding USB capability, the DAC1 USB gives you pristine D-A conversion, as well as all the "little" features that add up to a lot, such as programmable mute function and headphone gain, automatic standby/resume, and an output stage that's designed to drive long cable runs and low-impedence loads. The heralded UltraLock clock system is also included on the DAC1 USB D-A converter.

• A versatile D-A converter


• USB functionality


• UltraLock for ultra-low jitter


• Error display, Standby/Resume mode

The DAC1 USB is designed for maximum transparency and is well suited for critical playback in studio control rooms, mastering rooms, and high-end audiophile applications. Benchmark's Advanced USB Audio interface makes the DAC1 an ideal primary output device for digital audio workstations, desktop audio editing applications, computer-based media playback, home media servers, and computer-based radio broadcast systems. The rugged and compact rackmountable design makes the DAC1 USB an excellent choice for location recording, broadcast facilities, and mobile trucks.

The USB input is compatible with Windows Vista/XP/2000 and Mac OS X, and does not require driver installation or system configuration. Unlike all previous driverless USB audio interfaces, Benchmark's Advanced USB Audio technology supports sample rates up to 96kHz and word lengths up to 24-bits. The DAC1 USB is a true plug-and-play solution, and is designed to begin playback immediately after the unit is connected to a USB port for the first time.

The Benchmark UltraLock system is nearly 100% jitter-immune. The D/A conversion clock is totally isolated from the input digital audio clock in a topology that outperforms two-stage PLL designs. In fact, no jitter-induced artifacts can be detected using an Audio Precision System 2 Cascade test set. Any signal that can be decoded by the USB or AES/EBU receivers will be reproduced without the addition of any measurable jitter artifacts. The AES/EBU receiver IC has been selected for its ability to accurately recover data in the presence of very high jitter levels.

When the selected digital input signal is disconnected, incompatible, or drops out, the Input Selection Status LEDs will flash indicating a signal error. This flashing will stop when the error is corrected. If the error persists for more than 15 seconds, the DAC1 USB will enter 'Standby Mode'. This mode eliminates the need to turn the converter on and off. 'Standby Mode' starts 15 seconds after a digital source device is turned off, disconnected, or contains errors that prevent D/A conversion. All LED's are off while in standby mode. While in 'Standby Mode', the DAC1 USB continues to monitor the selected digital input and will immediately resume normal operation when an error-free signal is restored.

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All original packaging and accessories are included, 

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