Im running the HDS310s/pair of dvc 2 ohm @ 2ohms on approx 1500 rms(could use more power, but afraid that my non deadened roof cant handle much more ATM) in 4.0 @32 htz, and they slamm pretty good in my CRV.Roof gets a workout with some dubsteb,and they sound pretty clean as well as loud when wanting to driving down the highway.Pretty good subs thus far.My wonderful wife just bought me a set of soundqubed hdc310 d1s for my birthday. Just wanted to share. It will be my 50th. What would be a good size for a box? Hoping I can get by with 3.5cuft, with maybe 32hrtz tuning. For those who may know, is that a big enough enclosure for these subs?