I can't get past the appearance of the Mac amp/sub assembly (which I find to be butt-fugly), so I ordered the panel used on non-Mac cars ($1,225); . I plan to relocate both the amp and sub behind the passenger's seat. When separated, neither the amp nor the sub appears to be more than a few inches deep (can anyone provide the exact dimensions of each? I'm yet to remove the unit.) I'm confident that the amp will fit without a problem. I'm less confident about the sub, but will find a smaller replacement if need be. This strategy will enable me to continue to use the Mac (which does sound pretty darn good) and retain reasonable sound quality. I'll extend the wire harness as necessary and fabricate an enclosure to house both units which I will mount to the child seat anchor. Please post a response if IYO anything about this plan appears flawed.