I bought this 20 year old or so integrated amp off ebay uk in order to replace the Trends TA-10.1 that I fried (Trends is awaiting potential repair).
When I power the Rotel on or off, the speakers pop and the woofers move about half an inch. It's especially bad when turning off, and I notice it happens a couple seconds after I've press the button (at which point the sound also cuts off). I know energy is stored and has to run out after the unit is shut off, hence the delay for the sound to stop (which I believe is normal).
My question is why the pop and is there a connection between the slow power off and the pop?

Also, I've read that the 'output ic's' on this amp are notorious for burning out, what exactly are these and how would I go about replacing them when the time comes?