POWERBASS OE-400POWERBASS OE 400 4" midrange car speakers designed to replace 2 ohm factory speakers Replacement speakers for your 2 ohm factory system Some vehicles, like those with a Bose premium sound system, use low impedance speakers to get a little more punch out of the factory radio. If you try to replace these speakers with standard 4 ohm aftermarket speakers, you'll notice a significant loss of volume never a good thing. These 2 ohm replacement speakers,