decibels vs. spl

[valhallax]

so today I was rockin out my as-101's and turned up the volume to raise the decibels..later I was crankin up my 210's and as it was really nice out this afternoon, I opened all the windows, and the tunes got noticeably louder...so my spl was overcoming my listening space, hehehe
the forecast calls for a high pressure system rolling in.
my neighbors love me..or not

[LOUDER]

So let me get this straight.You wanted more db's. But they were spln out your windows, and you think high pressure is going to push them back in ?

[valhallax]

actually I thought it was more like compression.. people talk about room gain, but in this case, in a 30x40 room, it seemed the opposite

[LOUDER]

I now know exactly what your talking about. I actually cracked a window a few years ago.(whether it was the altecs or four 18"s remains to be seen.or the whole combo.) But if I can make it LOUDER by opening doors and windows? The neighbors will just have to keep on hating me, and we'll see if the local police hired anybody new !

[GM]

A room is a box, so open a window and/or a door to the outside world or even another room is like adding a vent, so will be tuned based on its acoustic properties same as a Helmholtz resonator or vented speaker.

Typically it lowers Fb and increases its upper bass, etc., so want to somewhat re-tune a room, then French doors or multiple adjustable windows has worked well for some. One dude used the doors, then re-tuned his speakers to increase efficiency for his flea power amp.

GM