My sub can hit 115 db@20 Hz, but only one metre away. My listening/viewing position is 4 metres away from the sub, so it's 12 dB down from that, or around 103 dB.

If I'm not mistaken, it will hit 132 dB at 32 Hz at one metre, though.

Of course, these figures are with corner reinforcement -- that tends to pick the response up below around 30 to 40 Hz. Anechoic response is nowhere near as impressive. And these figures are achieve close to Dmax -- needless to say, I don't make a point of driving it that hard.