sucks, they would near perfect for a lot of smaller projects especially. Shielded is a near necessaty for a cabinet since it will be up near the monitor (bad for non-sheilding) or down by the bottom where your computer is...
I had some non-shielded speakers in my cab for a while... and I used tinfoil to help (and it did some) but got real shielded speakers and never looked back... MUCH happier now.