[Otto]

Hi Greg,

Well, we normally measure our sub response by itself -- turn off all other speakers either by cutting power to their amp, or by simply removing the speaker cables from the speakers (or at the amp).

Also, the fact that you were able to measure the center response tells me that you were using some type of audio processing mode -- perhaps DPLII or "multi channel stereo" mode. Either way, disable any of those modes and just measure the sub in a stereo mode with crossovers engaged. REW is a mono signal that's meant to be handled in a simple fashion.

What sub are you using? You're getting a very solid response to 30 Hz, and then it drops like a rock. Is that expected or is the ICBM somehow imposing that?

If you're asking whether or not you should get a BFD, I would answer that I could go either way on that. Your response looks very good in general, and most of us would be happy to have a natural response like that. On the other hand, I love the BFD, and would not be without it or its equivalent.

In general, you're on the right track. It looks like you have REW set up properly, and you're able to take measurements. Keep going!