I have read on the HSU forums that some people who bought B-stock subs had their amps blow out. But since warranty was still good, they sent out a new amplifier for you to install your self. That seems like a reasonable deal. Also looks like HSU is coming out with some sort of VTF-3/HO turbocharged model soon. The VTF-3 would meet and far exceed my needs for $560 + Shipping.