Really? You're saying they don't handle rated? I've never heard that about a Hifonics product. They probably take the 400 in a sealed box but wouldn't do it in a ported box. As far as the lows, I think my sub hits the lows just right. It doesn't make a lot of noise on the low lows, but I think that's what makes it a clean-sounding sub, unlike my brother-in-laws old XPlods, I can actually hear a musical note coming out of this sub, instead of just the same booming sound every time the sub gets a signal. I dunno. It sounds fine to me. I don't expect notes at 30Hz and 90Hz to hit as hard or sound as loud as notes at 40Hz or 70Hz.