hey i dont know $71 is low i paid good money for these subs they slam hard and i only have it hooked up to 760 watt i need to get more out of these subs cause i do have to pay for shipping and i also have a few other things for sale i have 2 MTX8000 10inch subs fs/ft i also have a MTX8000 and i want to sell it cheap cause the voice coil in broke and if you take it to a car audio place they will fix it but hey i need to sell stuff soon and fast