It is "possible" to wire it this way. But it is the least effecive and most costly solution.
You would need to RCA Ys. take the Subwoofer preout and Y the SUB rca into all 4 inputs of the amp so they all get the same exact signal.
Then you would need to gain match each channel with a multimeter.
Failure to properly match each channel will result in poor performance from the subwoofer and possible damage.
Both channels MUST be 100% the same. If one is off just a little each voice coil will be putting out a different signal and they will fight each other reducing your volume, greatly increasing distortion and heat. Which could damage your amp and your sub.
So my answer is NO. Dont use that amp for your sub. More trouble than its worth. Use that amp for your mids/highs and get a mono class D subwoofer amplifer with at least 400-600 watts RMS x 1 @ 2ohms.
