Would appreciate any help! Just purchased an Audioengine B1 Premium Bluetooth Receiver (link) and trying to connect it to a Beomaster 4500 with a RCA to 7-pin DIN adapter cable. Pairing the device to my iPhone, I can hear music very softly from the Beolabs (iPhone volume all the way up, still need to put my head next to speaker). This happens with B1 connected to any of the Tape/CD/Aux inputs. Resetting and re-pairing B1 (as suggested in the manual) does not work.