^^^WTF are you talking about?
The FAS was stable to 2 ohms on the MQ-430 section and theoretically 1 ohm on the MS-2125 section. Those are streeo loads. Double that (4 and 2 ohms, respectively) for bridged operation.
The Son of FAS was stable to 1 ohm on all channels (2 ohms bridged). Running either below 2 ohms (4 bridged) requires forced air cooling and a really stout electrical.