First of all, the feedback is for the SELLER and previously sold items ... NOT that sub.
The sub is using a 500 watt replacement eD amp that can be purchased for $300 directly from Elemental Designs:
http://www.edesignaudio.com/product_...roducts_id=822
It is attempting to replace the 1000 watt amp designed for the sub and will NOT have the proper boost at the points required to make the sub sound like it did with the original amp.
There is no doubt that the sub will work, but it will not sound as originally intended.
Without ANY working amp, this sub was just an attractive doorstop ... it MAY be worth the asking price. Go ahead and buy it, then you tell us if it's worth it.
Bill C