I've been trying to figure out if my source, a toshiba satellite laptop with a realtek hd audio soundcard has a dc offset, but I can't find any information that doesnt require a complex knowledge of circuitry, the ability to take the soundcard apart, or using some electrical tools that I dont...

it seems like according to altec lansing they are the best model, but on amazon they were only $20, the lowest out of all the altec lansing products, which confuses me, since the supposedly worse backbeat series are about $70