[JohnR]

By "higher up," do you mean at 105 Hz? That isn't present in the measurement of the other channel, so I'm assuming it's not worth worrying about. This is all "pre treatment" - I need to think about the approach for that next

I'm not using the sealed subs on the front and rear wall, I have settled on a single dipole sub over to the right of the listening position. The decay plot is better overall (esp above 40 Hz) with the dipole sub. Here is the decay plot of the final integrated setup (150ms shown, with the default 300 ms analysis window in REW):



Sorry if this has been confusing... I've been a bit confused myself... I've gotten it all down in an article though - don't suppose you'd be interested in commenting on a draft? 

[bpape]

I was referring to the front and rear center position where the 80ish was tamed but one popped up around 55hz.

Decay time does look better.  The dip around 80 is back again but not as severe as before.

[MaxCast]

John, have you ever tried the digitalsix fft app with your iPhone?

[JohnR]

Studio Six? No, not tried it.

[Tyson]

Maxcast - I've tried it - on the iphone 3 it was fairly accurate, on the 4, not so much.

[MaxCast]

Yep that's it John.

Tyson. That's what I figured.     Thanks