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Sub Odrive refers to overdriving the subwoofer or when one has reached the sub's excursion limit. The HWK gets a --/? due to the bandpass design. The subs are internal and it is difficult to determine just how hard you are pushing them. One of the ways to tell is a audible clang(ODrive) from the sub bottoming out. Due to the fact at these power levels things are very loud, you might not even here the noise until the damage is done. This is a problem with all BP enclosures not just the HWK.
The Wedge also has a weakness in this department. It is a seal enclosure but you can visually check to see how hard you are pushing it. Sealed enclosure will play loud but with the air from the back of the sub trapped, this can often cause distortion at high power levels, which pretty much goes hand in hand with over excursion. But remember these are my opinions from the experinces I have had thru many a build. Regardless of the negatives, I would still recommend either enclosure for HT or home audio.
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