discharge noise on shutdown

thanks topkat! will unfortunately bring it back to shop. bummer when you spend this kind of $$$. nterestingly with my "new" speakers i haven't heard it anymore. Maybe I am a "negative" magnetic field as my CAL 10 has gone back to shop-2x in 2 years. i

It's definitely the amp (minor problem). I had the samething happen to me some years back with a Classe' DR-9 with the whistling right after shiut down. They replaced the relay circuit and good as new.