DD amps are great.I looked at a lot of different amps and I own a lot of high powered amps but for my final amp decision I choose the DD Z1a.....Not many amps in the 4000+ range are designed with the efficency to run off a basically stock electrical system....But the DD Z1a is //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
3294 watts @ 84% efficiency (252 amps draw)3938 watts @ 81% efficiency (316 amps draw)
4424 watts @ 74% efficiency (392 amps draw)
If you're running 4,000+ watts, you should have tha electrical to back it up though.. that's my opinion.memphis is not a good choice for daily because it has ZERO undervoltage protection. IE if your daily beating and your voltage drops ~10 volts your amp is dead