That Aura amp used to be mine. It is an older “Cheater” Amp. 4ch/3ch/2ch Bridgeable.
Class A/B
Unregulated Power Supply.
100RMS X4 @4 Ohm @14.4V
200RMS X4 @2 Ohm @14.4V
400RMS X4 @1 Ohm @14.4V
I had this amp and those MTX subs in my S4 at one point in time and hit 143Db at S/R cruise night. In the right car they could easily do over 145Db clean.