[rsachs]

It seems that the key problem that was causing the problem in the input level warning being to low was a Windows error: the SndVol32.exe file was wiped out. A reinstall of this file did the trick....almost.

Now I get the opposite error: Input level too high. It seems you have to adjust the input level on the line in to be a very very precise and relatively low value, using the Sound level control from Windows. Unfortunately, REW does the input setting so quickly you don't get a lot of time to adjust it while the process runs so it takes multiple attempts. Finally I got it just right. Then the next problem:

I could not set the target level for the sub. Either reading was too low, or the "no signal level" was too high at 61dB.

So where am I going wrong? Any suggestions?

After considerable frustration, I resorted to just using the stepped sine wave output, from 10Hz to 105Hz, and manually taking the readings on the RS, while entering the values in a spreadsheet, using the "new" RS calibration offsets to adjust. I found a peak at 50Hz (85db relative to 75db reference or full range pink noise). Figuring I want the sub system (2 Earthquake Supernovas and 2 Deftech Towers) to be 3dB over the fronts, I targeted for 78dB at 50Hz. This gave me 35 and 65 as the -7dB points around 50, for Q of 1.67. I set this as a filter in BFD, ultimately adjusting it to -5dB at Q=1.5. That measured at 50Hz at 78dB. Tomorrow I'll measure it all over again.

Let me know if this protocol seems workable.

Thanks,