I have only seen the RF sub once in a Titan at the dealer, not long enough to get any kind of measurements, but I have an older model 8" Memphis sub that I cannot part because I think the lows that it produces are excellent for its size. So I am considering building an enclosure similar to the RF. The mounting depth on this 8" sub is 3.75" with an overall depth of 3 7/8". Has anyone ever built one? or dissected the RF by chance, that might be able to tell me if there is something special to consider on building this. Originally I built a sealed enclosure with 1 cubic foot of air space to house this sub, so I will be trying to get that much air space as well.