Your Brutus amp can handle a 1 ohm load however, your coil configuration doesnt allow you to wire it up at 1 ohm but a 2.67 Ohm which will give your subs around 1250 watts or so.
You want to wire them in series like so:
The thing to be careful of is your gain setting. It is NOT intended to be used as a volume adjuster. The gain is used to set the input sensitivity which tells your amp how fast to go to full power based on your stereos volume setting.
Typically, you want to set your gain all the way down at first and turn up your stereo to about 3/4 ways. then go to the amp and turn it up until your subs distort, then back it down until the distortion goes away and your set.