Before buying Memphis I had a U.S, Acoustic 4 channel amp, it was pretty good and reasonably priced. also was using a very old peice of shit pyramid 2 channel amp for the subs, this amp was from the 80's, and had a ton of distortion.
Well once I heard how clear the Memphis were, I was sold, also needed to replace my U.S, Acoustic 4 channel amp because one of the channels crapped out on me. I was told how much better Memphis was and souned, and also that they were digital amps and used less eneregy, well that was bullshit. I had to add a second battery because the 2 channel would draw so much power, that my battery needle would go crazy and get a huge power drain. Once I added an addtional battery I had a total of 1475 amps, and never had a power drain experience again.