Hello, is there anyone who has experienced with broken preamp system ? My bongo 5 string (2003 model, HS version) is not working anymore. All I can hear is noises and fuzz. Local guitar technician said the Active EQ( or should I say preamp?) system is completely broken because of rusty resistors and some circuit parts. I can't use other third party preamp system because of Bongo building system. The knobs are recessed into the body. I live in a country where there is no Musicman dealer.