Rarely seen for sale!!
Per Berkley Audio Design’s Website:
“The Alpha USB is an asynchronous High Speed USB Audio 2.0 to digital audio interface designed to provide the highest possible audio quality from computer and music server audio sources.”
“The Alpha USB has a USB Audio 2.0 Standard input and switch selected digital audio output signal type, either coaxial SPDIF using a BNC connector or balanced AES using an XLR connector. Sampling rates up to 192 kHz and word lengths up to 24 bit are supported.”
“Great care was taken in the design of the Alpha USB to isolate the noisy computer/USB environment from the digital audio output. The USB receiver and processing are powered by the computer, while the output master clocks and line drivers are powered by a separate isolated linear power supply. There is no DC connection and also a high degree of capacitive and inductive isolation between the USB input and the digital audio output.”
While this was designed to interface well with Berkley Audio Design’s own DAC’s, I have found it to significantly improve the sound of any DAC, even those with “galvanic isolation” built into the DAC.
Reason for Sale? I am beginning a Master’s Degree Program and this was only minimally used in a Second System I am selling off to help fund my education. This is in mint condition andhas no cosmetic flaws I can find.
All serious offers will be considered. I am happy to answer any questions. Please allow me time to respond as I have a busy schedule and usually do not get time to check e-mails until the evening.
Final Offer accepted will need to have 2.9% PayPal Fees added. Buyer is to pay for shipping cost.
Thank you for your interest!!
Reviews of Berkley Audio Alpha USB:
The Absolute Sound (Issue 214/Robert Harley):
“The Berkeley Audio Design Alpha USB is a breakthrough product that not only overcomes the limitations of the USB interface, but provides a state-of-the-art method of getting audio out of a computer.”
The Computer Audiophile (Christ Connaker):
“After four months using the Alpha USB, in combination with the Alpha DAC Series 2, I'm continually astonished by its level of performance. In fact, the Alpha USB is so good I've yet to hear a better digital interface. Period.”
Input: USB Audio 2.0 Standard asynchronous connection, type B receptacle
Outputs: switch selectable, coaxial SPDIF on 75Ω BNC connector or balanced AES on 110Ω XLR connector
Supported sampling rates: 44.1kHz to 192kHz
Supported word lengths: up to 24-bit
Supported operating systems: Apple, Windows and Linux
Enclosure dimensions: 2.3”H X 10.5”W x 5”D, 2.55”H including feet
Mains power: 100/120/240VAC, 50/60Hz, IEC power input connector
Power consumption: 3W, designed for continuous operation