11-Mar-2021, 04:32
Your measurements are too low, 30 dB is considered a very quiet environment. Likely, you are picking up ambient noise plus a bit of the Phantoms in the bass region. Also suggest updating to latest beta version of REW.
Mine looks like this, left in red, right in green (offset -15 dB for clarity), 1/24 smoothing applied. In untreated family room...
Mine looks like this, left in red, right in green (offset -15 dB for clarity), 1/24 smoothing applied. In untreated family room...