Berkeley Audio Design Alpha USB 2 Series 2 Noise Isolation Device

Original box and manual. A few superficial scuffs on the top plate, otherwise in very good condition. 

Robert Harley in his June 2024 review in Absolute Sound said: 

"This humble looking $2495 box takes in USB and outputs SPDIF or AES/EBU. Its function is not merely as an interface converter, but rather as a device that isolates the noisy USB from the DAC and outputs a high-precision clocked signal with the noise removed. That may not sound too exciting, but the sonic effects are profound (...)  Every DAC benefited from the Alpha USB, sometimes dramatically so, even with very expensive DACs that you would think would have a well-designed USB input. And this was with the Aurender’s exceptional USB output that features special clocking, battery power supply, low-noise circuitry, and other tweaky design elements. When used with a computer’s ultra-noisy USB output, the Alpha USB was nothing short of transformative. But even the top Aurender server driving a $100k+ DAC system was improved with the addition of the Alpha USB."

Shipping in the lower 48 included. 

PayPal F&F, Zelle, check, money order or wire