orion cobalt 200.4 specs?

[Michael James Murphy]

I been having an orion cobalt 200.4 for a while. I just never messed with it until now. I was wondering if anyone has any info on the lowest ohm load to bridge 2 channels. I have 2 4 ohm subs and I was just wondering if I could drop them down to 2 ohms and bridge the rear channels. They are some cadence tens. 250 max 125 rms in a under seat probox In a Chevy Silverado ext cab 2001. Thanks in advance