You want to use the PreSonus universal driver... and yeah, it's ASIO (or Core Audio on Mac), but make sure you have the latest version 3.5.2.
Scroll down this page, it's under "Firestudio" devices. All of those devices in that class use the same universal driver.
http://www.presonus.com/technical-su...vers-software/
As to latency, it has direct hardware monitoring so unless you're recording through plugs then you shouldn't have any latency at all.