If it is of any consolidation. I had 2 8" Infinity ref 860W running off of a APSM 1300 in a custom T-line and they absolutely hammered. The lows were great. I threw everything at them and they never failed me . I still have them . I bought the SA-8 to replace them on a Memphis 16 1.500 in a different box.
I know some will doubt me , but the 8" SVC infinity with the APSM 1300 would outperform them . I'm no expert , but the 860w on the apsm made my speedo do 15 MPH and flex my hatch, and the SA-8 DVC 4 with the memphis could not budge them.
I have nothing bad to say, but I wish they offered a DVC in the infinity.
I think the infinity are like $45 a piece with 1 year warranty .