Reply To: Beomaster 6500 & 7000 improvement of pre-amp circuit June 7, 2022 at 3:03 pm #5735 RaMaBoBeoworld Member Near MunichTopics Started 0Total Posts 8 Hi, i attached the image i once loaded, but the quality of the circuit diagram is not so good 🙁 But it should be usable. Maybe “Die Bogner” can resend the image in a better quality.