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Although marketed as such, the AE-IB15"s are certainly not IB sub 'optimized' drivers. Not a low "Q" driver, they are certainly appropriate for other alignments. The low Fs and low Le are attractive features......

Peter, I ran 4-modest excursion 15"s in sealed boxes in my first HT (1989). When DVD's came out I was bottoming the drivers all the time. That's when I threw in the towel and went for multiple drivers with much higher excursion. Over the years I've found no advantage to multiple lower...

Please be so kind as to provide a reference to the testing that validates this statement. Thanks, Thomas

Probably not, the box is too small = the Qtc too high. The best performing portable sealed boxes have a "Q" of 0.5. Also I hope you're planning on a very low XO point. Given the very high Le of the Quatro, you probably don't want to run it much above 70Hz, and lower would be better. A...