Many people forget about the box size and end up with a poor quality box. This is why reviews for subwoofers are so important. Once you start looking at reviews, you'll find reviews on box sizes and how they match up to different subwoofer sizes.
If you're looking for free box models, then you'll find some good sites where you can find them. The sound you get is highly subjective, so some sites aren't going to be very helpful in terms of giving you a truly accurate box measurement. Lo
