Hi, Daniel, If you care to pay a look to my web site www.qsl.net\ea3blq\in_dig_ang.htm you'll see how I use the balanced audio output present at J5 and convert it from balanced to unbalanced to feed the incoming audio to my Digital Interface for the K2. Greetings from Barcelona, Spain Best 73 Pauli EA3BLQ K2 # 1044 URL: http://www.qsl.net/ea3blq/ [email protected] [email protected]