Im not a big fan of orions new line up. I do have the new hcca 600d pusing a xtr, and it does fine but the specs are not like the older orions. I am about to install the xtr pro 15's with a 2100 hcca G4 wired at .5 ohm. Ive had it stable @ a .25 ohm puching over 4000 watts. You can not get these specs from a new orion and compete in the class the older ones did. But further more on the new sub. It is a beast. orion has videos on the 12" competing against kicker, jl, cerwin vega, and rockford and the sub whips there ass. so yea i would get the new hcca sub but not there amps. here is a link to see the vids. http://www.orioncaraudio.com/Promos/HCCA_C...ge_Results.aspx. yall are welcome guys. -orion