yes, but a lot more punch than any other of the collum array systems and a lot nicer sound. It hangs really well with the MUCH higher powered and bigger dual 12" DB Tech.
But I agree to a point, which is why I added F1 subs. The F1 subs blow away the dual 12 in the ES1203 in terms of low-frequency extension, but I was okay giving that up for more upper-end kick.
I ended up mainly using the B1s with F1s, Not B2s as the B1s sounds better and made more sense when combined with the F1.
I got more complaints about being too loud with the B2s than any other system I used for an extended period. 100 feet back it would rattle things crazy and I got many venues telling me to disconnect the "subs". I even got banned from one venue.. Go figure!