Going through a few ideas about what I'm going to change next. Thinking about doing a 4th in the cab of my truck. I know I won't be able to fit a 6th so 4 th would be the only other option other than a flat wall. I've been told a 3:1 ratio for spl so I'm thinking 4 sealed and 12 ported? I could more than likely fit that. Suggestions?
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