[atledreier]

Such a low tuning that I used is a somewhat special case. I tuned it that low because the driver/port/enclosure system would roll off about 6dB towards the tuning frequency. At such low frequencies this rolloff is countered by room gain (the room acting as an enclosure in itself), thus yielding a flat in-room response. Most systems aim to have flat response for the system itself. Read up on LLT (Large low tuned) and EBS (Extended bass shelf) for more information on this way of doing things. I ended up with 13.3 for my enclosures. I was aiming for around 14. The caps and port took less volume than I anticipated, and my internal damping was probably more efficient than anticipated. That said, they play very, very well.