You could set the gains low, like set the gains low enough so that your normal driving volume only gets like 800 watts out of the amp. Depends on how many amps too. For 2 orions you could get dual 2 ohm subs. wire the subs series all of them, for 4 ohms a piece, parallel a pair to each orion for 2 ohm load and something like 1200-1400 watts per pair of subs. Then for comp wire the subs down to 1 ohm load each, .5 ohms to each orion amp for a hella lot of power. This is what I would do, I've heard those subs can take serious amounts of power on burps anyhow.
Or if you wanted to run just one orion amp, you could get dual 2 ohm subs, wire them all series 4 ohms ea, then parallel to the amp for 2500 x1 at 1 ohm for all 4 subs netting about 625 watts each.