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what does pressurizing a room mean

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Nick B:
Some of you have been aware I’ve been looking for new/used speakers for over three months. As I’ve done a lot of reading regarding speakers, I’ve come across this term a number of times. I’d appreciate an explanation of what that term means. Thanks,
Nick
PS as it fits in with this post, i wanted to mention that I have abandoned my pursuit of full range single driver speakers

_Scotty_:
In my experience, most of the time room pressurization occurs when one has standing waves in a room. These are areas of high sound pressure levels in the bass frequencies. There are also corresponding areas of low pressure as well.
 When you are in or near a standing wave zone you can frequently feel the sound waves across your entire body which is a function of the bass wave length being reproduced. 32Hz is the threshold of both feeling and hearing the bass frequencies. As the bass frequencies go lower than 32Hz we predominately feel the bass rather than sense a discrete pitch as we can at higher frequencies. 
 Dipole sub-woofers  generally don't pressurize a room the way box type sub-woofer does. They also get less of the benefits of room reinforcement in the bass frequencies when compared to box type subs. More power is also generally required and servo control is mandatory in order for this design to function properly.
 When I attended symphonic concerts there was no room pressurization, there was the sensation of impact on my body and to my chest cavity from the tympani drums and the big bass drum. On the other hand I have experienced room pressurization or the sensation of bass being felt on my entire body from pipe organ performances. You will notice that I have avoided characterizing the bass behavior of amplified music which can being wildly variable. Even live jazz performances may be hard to characterize if amplification is present.
 It may come down to equalization and how far the knob was turned during any given performance.
Scotty
 Disclaimer, I have a bass problem, and I have no intention of enrolling in a 12 step program.

rollo:
   Scotty covered it all. Just add volume to the mix. The more volume the more pressure. Nick please consider the location of where speaker to be chosen must be positioned in your room.
   Without proper placement no speaker will perform at its best period. Will they be close to front wall ? Side walls ? Is there a TV in the middle ? Rack in between ? Those items will affect your choice big time.
   Look at Fritz Carrera. On a budget ELAC. Stand mounted designs go a long way with obstacles as mentioned.


charles

Nick B:
Although I enjoy a room with excellent bass response, it’s not possible in my situation and I’m not a bass hound anyway. I very much enjoyed what the SP Tech gave me .... extension into the 30s. As to
speaker placement, max 2’ from left sidewall and max 3’ from front wall. Previous setup was 6-7’ apart and listening 11’ ft back. That’s the desired/mandatory setup. It needs to work...few other options.

Have looked at Fritz, GR Research and currently looking at

http://audience-av.com/loudspeakers/1plus1/ with help from                                                      https://rel.net/shop/subwoofers/zero/

http://www.evolutionacoustics.com/loudspeakers/micro-series/microone/

As I’m downsizing and simplifying, nothing heavy or taking up lots of space. Easy to pack and easy to ship......someday.  Budget fluctuates
Nick

Bill O'Connell:
How about the Dynaudio Special Forty ?

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