Just got back from metering. As you all know i fixed my voltage problem and so it only drops to about 13 (used to drop to 11.8). Here are some numbers from today. And these numbers are from tones, but it does the exact same numbers on music.
On the dash at 41 hz: 143.0 dB
On the dash at 24 hz: 140.3 dB
In the kick at 41 hz: 144.1 dB
In the kick at 24 hz: 142.1 dB
My amp (Powerbass ASA1500.1) was also clamped during these runs doing 1100 watts, rising from 1 to 2 ohms. I'm very impressed with this amp and these subs. Love the way they sound and this box is very musical, while putting up good numbers for a regular cab on 1100 watts.