Here's an example of using three SVC subs. Generally, SVC subs are 4ohms.
You'd wire the subs in parallel to the amp for a total load of:
1/R = 1/4 + 1/4 + 1/4
R = 1.33ohms
You'll then need to find an amp which is stable into a 1.33ohm mono load (round down to 1ohm to make sure it's stable). You'll more likely spend more money for a 1ohm stable amp, have less of a selection, and might possibly have more heat dissipation/distortion problems to deal with.
