When you first plug the sub in after it has sit overnight, you should hear a low level, but solid, thump. If you don't here this thump, the sub is not turning on. It does not have an on/off switch. It turnes on with the power.
If the sub thumps on turn on, I would double check the cables from your amp output to the sub. The filter inserted between the preamp and amp will not keep the sub from working since the signal comes off the output of the amp.
If the sub doesn't thump, make sure you have wall power at the socket.
If the sub thumps on turn on, I would double check the cables from your amp output to the sub. The filter inserted between the preamp and amp will not keep the sub from working since the signal comes off the output of the amp.
If the sub doesn't thump, make sure you have wall power at the socket.