discnik
The thump you hear is likely discharge of capacitors in the power supply and causes no harm, nor is it a sign of something wrong. I am associated with a company that manufactures monitors that do the same thing, and I have had long discussions about it. The normal way to prevent the thump is to use turn on/turn off muting circuits, such as a relay, which in some cases engineers feel affects the sonics. In other cases they say it's one more thing to go wrong. Connecting the driver to the amp without power on/off muting is a choice and not an oversight. It does sound a bit alarming but isn't a worry!
Brad
The thump you hear is likely discharge of capacitors in the power supply and causes no harm, nor is it a sign of something wrong. I am associated with a company that manufactures monitors that do the same thing, and I have had long discussions about it. The normal way to prevent the thump is to use turn on/turn off muting circuits, such as a relay, which in some cases engineers feel affects the sonics. In other cases they say it's one more thing to go wrong. Connecting the driver to the amp without power on/off muting is a choice and not an oversight. It does sound a bit alarming but isn't a worry!
Brad