Originally Posted by LTD02
"Performance at the limit is not predictable..."
Tell me how much compression will occur between 55 and 70hz with the driver of your choice in a sealed 130L enclosure with a nominal 120db sweep level referenced to 50hz at 2m outdoor gp. How much distortion and noise will be present in the 10-20hz octave during this sweep and what will the harmonic makeup be? For that matter what will the simple FR at 80db nominal look like exactly? Perhaps the vc melts? Maybe it bottoms out? Who knows what can happen. You can make reasonably educated guesses but without measuring it you won't know for sure.
The commercial subs that Audioholics is going to test...Can you say when their limiters or protection circuits will kick in, how aggresive they will be, whether they even have these circuits, what the base FR will look like, where they will compress first or hardest, how much distortion will be present, etc? How much 25hz signal can that PSB output at maximum?
For example who would've predicted that the 13" driver in the SVS PB13 Ultra coupled with the 750w rated amp would perform as well as it does? I certainly wouldn't have. SVS has always had good products but it is a substantial leap over their previous 12" offerings with only slightly more cone area and power.