I think I'm going to leave this topic alone. Some people on here are too emotional. They guy from Emf has a video comparing the Smart 3k to a half bridge. He was explaining the difference, but I'm sure you would call him a hater. He also tested that overrated Rockville Punisher. I'm pretty sure I'm getting the sfb 5k, and when I hook it up I will know immediately if the low end is lacking. I will report back once I actually run it, but it won't matter because people love to live in fantasy worlds where the L7 is a great sounding sub. There is another well known youtuber that tested a lower power full bridge on a sub, and he said the same thing about the bass. If power is power like everyone on here wants to believe Sundown shouldn't be able to sell one Salt amp unless people love to waste money? Maybe Sundown figured it out since they swear up and down that their amps are different than Brazilian amps?