Bass traps require dissimilar materials, wood, foam, fiberglass, corrugated, etc. to diffuse the sonic pressure.
It is a lot of work and time to get that tuned right to the room and a given source.
If you stay above 80Hz, you avoid that,... just HPF your mastering.
Very few can reproduce it at home or through ear pods anyhow.
GC is on-point, listen before you buy.
It is your hearing that is important.
I do not EQ to flat, although start there.
I rarely use loudness at all.
The new Lady GaGa release is a brick of compression.
Many people have said that they love it, and it will likely win awards.
Everyone has their own preferences...