Rockport Avior II's in 19x24.5 room?

@mckinneymike 

I also used an acoustician. He designed my room and  while my Avior ii speakers were being built I built my room. Who did you go with? My acoustician was Jeff hedback at hdacoustics. 

I love subwoofers all types cuz it's all about the base😃

@ronboco  I have a friend that is in a firm here in the North Texas area that does primarily large corporate projects.  He is giving me his inputs on diffusion/absorbtion/placement, but I want to finalize my speaker selection before I do a final design with measured performance.  

  I have exchanged a few emails with Jeff and know of his reputation among forum members here and in other forums.  I still might engage him once I take possession of my dream speaker.  I am having some scatter plates CNC’d to use on my DIY acoustic panels.  My interior designer (wife) selected the coordinating color/fabric for the Guilford fabric I am using.

  You obviously did a complete from scratch design and that is quite impressive to say the least.  I should have requested input before I started this build, but I think I can live with the bones of this room as it is built much more solidly than a typical room structure.  

@mckinneymike 

It sounds like you are thinking everything through very well. I’m sure your room will sound amazing once you get it all done and don’t forget to share some great pics of it! 
 

Regards 

Ron 

@mckinneymike 

Pressurizing the room is about moving air - so high db and low hz help a lot.  Bass moves more air than midrange.  As @soix already said, you get down to 25 hz with -3db.  Not bad...  20 hz with -3db would be better, but, you can do well with 25 hz...   Play with speaker positioning as much as you can to increase the bass without it getting flabby, ie. the closer to the front wall, the more bass, but, it can get boomy/flabby.   Then, there is room treatments to play with.  I also have a big room with high cathedral ceilings and I managed to get great bass out of my tower speakers by good positioning (note: mine go down to 20 hz).  My area is a living room and bar with lots of objects in it and pictures on the wall...  This can also help with the boominess. 

Note: Looking at the Stereophile review of your speakers, it seems they dip down to 2.3 ohms or so at 22 hz...  If you have an amp that almost doubles down in power as the speaker ohms halve, you may get more bass out of those speakers.  Here is a quote from the Stereophile speaker review that may help your cause: "The coincidence of the port tuning and the lowest-frequency mode in my room boosts the Rockports' output in the octave between 18 and 36Hz, a region where the sealed-enclosure Magicos were more neutrally balanced."