Yea i have 2 12 w7 s running off 2 1000/1 s , and it s nice , real deep clean and hits low as hell. As for the orion s we had a car with 2 13w7 s and 2 2500d s on them for daily.. yea it sounds like alot but we had the gains set perfect and that... was crazy.. id say around 12.8-13.8 he was prolly getting 2000 or so per sub, partially cuz they were also running at.75 ohms .. the 12w7 s are tricky to find amps for but id look for a 2 ohm stable amp that can run down to 1 ohm ... like the orions s are 1 ohm stable but run at .5 all day .. if u did get a 2500d for them ud prolly be giving them around 900 watts per sub after rise and voltage drop