Box designing is complicated sometimes, because not everybody knows what they want, or haven't had a lot of experience, some people have ears different than others, etc. The way something sounds is subjective. There's many factors other than the box that can make the system sound bad as well, that I have no control over. Sometimes woofers just aren't the best, or people think they wanted something they didn't. I have to look at the whole picture and figure what will work the best. I look at every woofer and the specs on them and get vehicle information and tons of info before I even start designing. I just take my time to where I feel comfortable with the information I have, then I design with the whole picture in mind. It can be quite a balancing act sometimes.