Hi Greetings from Denver--should be in Aspen tomorrow. My measurement software shifts over to a room response below 200 Hz. I find that very useful in voicing the woofer, because I can see just how prominent the inevitable 70 Hz peak will be for a given woofer in my room, and I can use that as a reference point for building in an appropriate amount of baffle step compensation. My room is very similar to rooms many users have, and although there will be variation, it's still better than just relying on a near-field plot of the woofer, spliced with the port. Sometimes Jim shows frequency response curves with the room response below 200 Hz, and sometimes he doesn't. The problem with showing is that a lot of people will freak out. There will always be a big dip centered around 150 Hz, which is floor bounce cancellation and impossible to avoid unless the woofer is right at floor level, and there will be the 70 hZ (or around that frequency) room peak. So it looks uuuuuggggglllllly. As for bass extension on the ST vs. the Song Center and the Sierra, the ST is pretty much flat down to 37 Hz with room gain. The Song Center is going to start going South quickly just below 50 Hz. I'm just guessing that the Sierra in room will go into the mid 40's.
