[Vader]

Unicron-WMD,

When Ron and I were troubleshooting a single 20-39 PC+ cylinder (remember, 3200 ft^3), we found that compression started to set in around 106-107dB (listening position about 12 ft away) using the "tripod emergence" sequence in WotW; any louder and I feared for my own safety (and the structureal integrity of the house). So, as co-located duals would give approx 6dB additional headroom, that would be in the ballpark of your figures. I am thinking that once I get a BFD and upgrade my soundcard, I can raise the lost 3-4dB SPL back to flat safely. I thought WotW bottomed the single 20-39 PC+ cylinder, but now am not so sure that is what I heard. The sound is described as a loud "clack", but is it obvious it is not part of the soundtrack? I had mistaken a loud "crack" (during the rocket launch in "The Incredibles") for bottoming, but Ron told me that many do, and for that reason they don't use that particular sequence for testing. I just don't want the subs bottoming because I am oblivious to what is happening.