Hi guys, sorry on the Peerless recommendation, I don't know why I missed that it was 83db sensitivity.
@stevepa on the Peerless SLS 830669, it will go down to about 50 hz in a sealed box. I would not mind porting the box on the right driver, but this driver really wants a large box ported. Also, it has a very cheap frame. That does effect sound quality.
In 3 cu ft, the Scan Speak will work well. The Monoliths published crossover point is 125hz. I believe stevepa said that he was crossing electronically. Good excursion limits, however, with a qts of .32, you must vent or port your box with this woofer. If you do so, it will go be 3db down at just about 27 hz in an sb4 alignment or 24 hz in a qb3 alignment.
As it stands, I'd run this way without worry of distortion.
Of course box size could change it all.