I used to have a Pioneer 7400MP in my car and my music used to sound clear and loud. It was 50 x 4 Power. Now I just got an Alpine 9857 and now my music isn't as loud as it used to be. I looked up the specs and it says that it pushes 18watts RMS x 4. So obviously the Pioneer is making more power right? Last night I looked for a multi channel amp and I came across a 240 Watts that pushed only 18RMS x 4 at 4 ohms. Now all I want is for my mids and high to be as loud as they were with my old Pioneer. Is a multichannel amp what I need to do this? I played around with all the settings on the Headunit and yet it still isn't as loud as my old Pioneer. Some have any advice for me?