IF you have the amp or can look at it, you should be able to tell on the back panel. There is often a switch and or pictoral instructions for bridging the amp if it's possible.
BTW, if the amp is bridgable, it would probably put out more than 250 wpc. When bridged, the wpc rating is normally twice the 4 ohm output power.
BTW, if the amp is bridgable, it would probably put out more than 250 wpc. When bridged, the wpc rating is normally twice the 4 ohm output power.