RickyShade

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.

The HFX12D4 is a great sub especially for the price. It is rated at 400/800, although some sources falsely list it as a 300/600 sub like the HFi. You overpaid, but paid the right price for it being a local shop. $32 shipped on Amazon is what mine cost. I love the damn thing. 250+W RMS and all the bass boost in the world all day every day and doing plenty well at it. Can't wait to get more power, and another one of these cheap bastards, to blow people's brains out proper, on the cheap no less...