Check the listing for details. Audison AV bit IN HD VOCE Series HD Digital Audio Interface for VOCE Amplifiers. Condition: New. Listed at 649.99 USD. AV bit IN HD - DIGITAL INTERFACE Digital interface for all AV amplifiers, for perfect digital connection with Audison bit processors provided with AD Link and AC Link connections. By mounting the AV bit IN “Digital Interface” onto the Voce amplifier series, through the AD Link connection the S/PDIF digital signal will get directly to the high quality internal D/A converters. After these, the signal becomes analog and is immediately amplified preventing it from deterioration due to the long paths. The result is extremely high quality music, not achievable with any other analog system. It offers one AD Link and AC Link input, as well as one AD Link and AC Link output in order to drive a multi-amplified system.