Those sub-woofers.. it depends. Some has shielded body and does not. Usually, sub-woofer does not have shield to block the magnetic field as in the satellite speaker.

It is a good practice to not put sub-woofer near tv, monitor, or games console.

Tak Percaya.. Sila angkat itu sub-woofer dan letak depan CRT-TV. If ada kaler-kaler kelakar kelaur than it is not shielded.