Picked up a couple 8Ks the other day. Initial testing is very promising. I did a 158.0 with just one (was doing 159.2 with the Soundigital 12K) driving my subs wired to .7 ohm. Added the second one both amps driving 1.4 ohm and put up a 159.3 today at a show. Really first day out with them but so far so good, they seem to make a lot of power, price is stupid cheap and comes with Sundown 2 year warranty through a local dealer which is nothing to sneeze at. I'm thinking Sundown is going to sell a lot of these.