The equipment I used was the following:
Behringer ECM8000 microphone
Focusrite Scarlett 2i2 USB A/D with Phantom 48V power for the microphone.
25' XLR male to XLR female cable
Tripod to hold the microphone where I sit.
Point the microphone straight up at the ceiling.
Run the RoomEQ software
Make sure it can see the microphone and can send audio to your stereo.
Like I said, I used a USB cable from my computer into my OPPO 105D'd DAC, but you can use analog outputs from your computer if that is easier.
Get a baseline to make sure your volume is adequate for measurement. I centered around 75 dB for most of what I did.
Once you get a frequency response make small changes and re run the sweep. I made 40 small changes one day.
My room naturally amplifies the low end a bit and I ended up running a bit negative on my bass controls.
The following worked for my room. I'm not sure if they are general guidelines or not.
Bass: Distance from the front wall dramatically impacts my bass response. I pulled my speakers out until the bass became crisp and lost the boominess.
Mid: The distance between the speakers seemed to impact the peaks and valleys in the mid range.
Highs: Toe in and the front panel angle to the floor impacted the higher frequencies more.
After a lot of iterations, I finally ended up with this. 21.6 Hz to 20kHz +/- 5dB which is pretty good without room treatments.
To be fair that is with 1/12 smoothing. Without any smoothing it doesn't look nearly this good, but you need to look at the smoothed values to help make changes that average out to an improvement.
It sounds very lifelike to me at all the volumes I listen to music. However if I push the volume much higher than I like the sound quality falls apart and it gets very boomy which I believe is an artifact of my room.
