John... the only thing out of the ordinary on the way I have windows set up is I have the screen black. Besides that, it's just the norm. After work, I double check the exact setting, and then reset the diplay to the original Windows theme and see if that makes a difference.
Bruce... I'll be sure to standardize the graph and readout response. I didn't get the plot out until late last night so at that point I was just happy to have a plot to play with
. As for adjusting the sub volume, I have an IB sub powered by a prosound amp. The cut on the sub amp is at zero (the nob on the front is turned fully clockwise). The only other way to increase the volume relative to the mains is to increase the gain of the SUB OUT on the integrated but that was set to optimize the level input to the BFD so as to not make it clip. Obviously I don't want to change that. That's why I questioned whether I should decrease the gain (or increase the cut) on the Samson itself before calibration. Having headroom to adjust the volume of the sub vs the mains after calibration would be nice .
Having said all that, there is the fact that the sub played significantly louder than the mains over the bulk of it's frequency range before calibration when the gain on the Samson was at the same level. I tested the system response previously with test tones playing from 10Hz to 100Hz in 1Hz steps, and then spaced out from there up to about 200 Hz. When I tested the combined output of the sub and mains, the pink noise was set to 75 dB. The in room response from the main seated position started at 77dB at 10 Hz and steadily and for the most part evenly rose to 97 dB at 37 Hz (there were a few minor blips). It then dropped to 83 dB at 46 Hz. After that it rose to 100 dB at 56Hz (and stayed there until 63Hz). From there it droped to 95 dB at 76 Hz and then rose to 99 dB at 81 Hz (and stayed there until 100 Hz). Then it slowly dropped to about 75 dB at 140 Hz. As stated before, all of this was done with the amp gain turned up 100% and the level output from the integrated amp set to a point where the clip light on the Samson S700 has only flickered once.
What I take from that is with the gain of the sub amp where it is right now, I should be able to generate a plot without boosting anything that is flat to 10 Hz (except for where the dip is at 74 Hz).