In the house we recently sold, my "man cave" was a 24’x26’ room. I got the system with the main speakers "dialed in", sounding awesome. Then when I added my sub woofers I discovered that the room had terrible acoustics in the bass region; regardless of the bass line in the music, the room added one loud bass tone.
I eventually purchased a " miniDSP UMIK-1 USB Measurement Calibrated Microphone" (I found it on Amazon), a mike stand and the REW (Room EQ Wizard) software (
https://www.roomeqwizard.com/ ), which guided me to purchase and position what eventually turned out to be 10 bass traps, to mostly control the errant bass response from the room.
I probably could have used two more traps, but the love of my life began asking if I was headed for my "padded cell" when going for my nightly listening session.